System.NullReferenceException: 未将对象引用设置到对象的实例

在学习微软认知服务,用C#编写了一个简单的接口,但是出现了“未将对象引用设置到对象的实例 (System.NullReferenceException)”这个问题。在网上查了原因,好像有以下几种说法:
“System.NullReferenceException: 未将对象引用设置到对象的实例”问题可能原因如下:
1、ViewState 对象为Null。
2、DateSet 空。
3、sql语句或Datebase的原因导致DataReader空。
4、声明字符串变量时未赋空值就应用变量。
5、未用new初始化对象。
6、Session对象为空。
7、对控件赋文本值时,值不存在。
8、使用Request.QueryString()时,所获取的对象不存在,或在值为空时未赋初始值。
9、使用FindControl时,控件不存在却没有做预处理。
10、重复定义造成未将对象引用设置到对象的实例错误.
第一次接触C#,看不出来究竟属于哪一类错误,求问各位大神这个错误应该怎么修正。编译器提示的错误在代码中注释出来了
以下附小弟源码:

 using System.Collections.Generic;
using System.Net.Http;
using System.Text;
using Newtonsoft.Json;
using System;
using System.Net.Http.Headers;
using System.Web;

public class Program
{
    private const string ApiKey = "804e4631f32a421b8cf8066ca2d54fb0";

    private const string DescribeImageApiUrl = 
        "https://api.projectoxford.ai/vision/v1.0/describe?maxCandidates=3";

    private const string ContentType = "application/json";

    public static void Main(string[] args)
    {
        var imageUrls = new[] { "http://i.imgur.com/OJ6lzhz.jpg", "http://i.imgur.com/OV80Pr8.jpg" };

        foreach(var imageUrl in imageUrls)
        {
            var response = DescribeImage(imageUrl);

            Console.WriteLine("Image: {http://img.taopic.com/uploads/allimg/110910/2316-110910124R147.jpg}");
            Console.WriteLine("Descriptions:");

            foreach (var caption in response.Description.Captions)//提示错误出现在这一行
            {
                Console.WriteLine(caption.Text);
            }

            Console.WriteLine(new string('-', 5));
        }

        Console.Read();
    }

    private static DescribeImageResponse DescribeImage(string imageUrl)
    {
        var client = new HttpClient();

        client.DefaultRequestHeaders.Add("Ocp-Apim-Subscription-Key", ApiKey);

        var imageJson = new { url = imageUrl };

        var response = client.PostAsync(
            DescribeImageApiUrl,
            new StringContent(
                JsonConvert.SerializeObject(imageJson),
                Encoding.UTF8, ContentType)).Result;

        var content = response.Content.ReadAsStringAsync().Result;

        return JsonConvert.DeserializeObject<DescribeImageResponse>(content);
    }

    private class DescribeImageResponse
    {
        public DescribeImageResponseDescription Description { get; set; }

        public string RequestId { get; set; }

        public DescribeImageResponseMetadata Metadata { get; set; }
    }

    private class DescribeImageResponseDescription
    {
        public List<string> Tags { get; set; }

        public List<DescribeImageResponseDescriptionCaption> Captions { get; set; }
    }

    private class DescribeImageResponseDescriptionCaption
    {
        public string Text { get; set; }

        public decimal Confidence { get; set; }
    }

    private class DescribeImageResponseMetadata
    {
        public double Width { get; set; }

        public double Height { get; set; }

        public string Format { get; set; }
    }
}

4个回答

断点进去看哪里空了 空指针异常很常见的

不知道HttpClient中的PostAsync执行后的response.Content.ReadAsStringAsync().Result是啥,
看样子像是转化的Json字符串格式格式和你定义的类型不匹配

1.首先确保content有值
2.确保JsonConvert.DeserializeObject(content)转换成功

foreach (var caption in response.Description.Captions)//提示错误出现在这一行
在这前面判断下response是否为空就好了

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新手,求大神解答! 未将对象引用设置到对象的实例。 说明: 执行当前 Web 请求期间,出现未经处理的异常。请检查堆栈跟踪信息,以了解有关该错误以及代码中导致错误的出处的详细信息。 异常详细信息: System.NullReferenceException: 未将对象引用设置到对象的实例。 源错误: 行 58: string txt = ftb.Text; 行 59: string newstime = Request.Form["newstime"]; 行 60: string txt1 = newstime.Substring(0, 4) + "/" + newstime.Substring(5, 1) + "/" + newstime.Substring(8, 1); 行 61: string strInsert = "insert into news_article(bigclassid,title,writer,newskey,newstime,content,newsfrom)values('" + Request.Form["bigclass"] + "','" + Request.Form["title1"].Trim() + "','" + Request.Form["writer1"].Trim() + "','" + Request.Form["newskey1"].Trim() + "','" + txt1 + "','" + txt + "','" + Request.Form["newsfrom1"].Trim() + "')"; 行 62: SqlCommand commInsert = new SqlCommand(strInsert, conn); 源文件: c:\Users\123\第11章\add_article.aspx.cs 行: 60 堆栈跟踪: [NullReferenceException: 未将对象引用设置到对象的实例。] add_article.Button1_Click(Object sender, EventArgs e) in c:\Users\123\第11章\add_article.aspx.cs:60 System.Web.UI.WebControls.Button.OnClick(EventArgs e) +9692746 System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +108 System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +12 System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +15 System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +35 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3562 代码: using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using System.Data; using System.Data.SqlClient; using System.Configuration; public partial class add_article : System.Web.UI.Page { SqlConnection conn = new SqlConnection(ConfigurationSettings.AppSettings["conn"]); protected void Page_Load(object sender, EventArgs e) { if (Session["username"] == null || Session["password"] == null) { Response.Redirect("login.aspx"); } string rqid = Request.QueryString["newid"]; if (rqid != null) { Button1.Visible = false; string strSql = "select newid,bigclassname,title,newsfrom,newstime,writer,hit,newskey,content from news_article inner join news_bigclass on news_article.bigclassid=news_bigclass.bigclassid where newid='" + rqid + "' order by newstime desc"; conn.Open(); SqlCommand comm = new SqlCommand(strSql, conn); SqlDataReader dr = comm.ExecuteReader(); if (dr.Read()) { title1.Text = dr["title"].ToString(); newskey1.Text = dr["newskey"].ToString(); newsfrom1.Text = dr["newsfrom"].ToString(); writer1.Text = dr["writer"].ToString(); ftb.Text = dr["content"].ToString(); newstime.Text = dr["newstime"].ToString(); } conn.Close(); } else { newstime.Text = DateTime.Now.ToString(); Button2.Visible = false; } string strLeiBie = "select * from news_bigclass"; conn.Open(); SqlCommand commLeiBie = new SqlCommand(strLeiBie, conn); SqlDataAdapter da = new SqlDataAdapter(); da.SelectCommand = commLeiBie; DataSet ds = new DataSet(); da.Fill(ds, "leibie"); bigclass.DataSource = ds.Tables["leibie"]; bigclass.DataBind(); conn.Close(); } protected void Button1_Click(object sender, EventArgs e) { conn.Open(); string txt = ftb.Text; string newstime = Request.Form["newstime"]; string txt1 = newstime.Substring(0, 4) + "/" + newstime.Substring(5, 1) + "/" + newstime.Substring(8, 1); string strInsert = "insert into news_article(bigclassid,title,writer,newskey,newstime,content,newsfrom)values('" + Request.Form["bigclass"] + "','" + Request.Form["title1"].Trim() + "','" + Request.Form["writer1"].Trim() + "','" + Request.Form["newskey1"].Trim() + "','" + txt1 + "','" + txt + "','" + Request.Form["newsfrom1"].Trim() + "')"; SqlCommand commInsert = new SqlCommand(strInsert, conn); commInsert.ExecuteNonQuery(); conn.Close(); Response.Write("<script>alert('成功添加新闻信息!');windows.history.go(-1);</script>"); } protected void Button2_Click(object sender, EventArgs e) { conn.Open(); string txt = ftb.Text; string newstime = Request.Form["newstime"]; string txt1 = newstime.Substring(0, 4) + "/" + newstime.Substring(5, 1) + "/" + newstime.Substring(8, 1); string strUpdate = "update news_article set title='" + Request.Form["title1"].Trim() + "',bigclassid='" + Request.Form["bigclass"] + "',writer='" + Request.Form["writer1"].Trim() + "',newskey='" + Request.Form["newskey1"].Trim() + "',newsfrom='" + Request.Form["newsfrom1"].Trim() + "',newstime='" + txt1 + "',content='" + txt + "'where newid='" + Request.QueryString["newid"] + "'"; SqlCommand commUpdate = new SqlCommand(strUpdate, conn); commUpdate.ExecuteNonQuery(); conn.Close(); Response.Write("<script>alert('成功修改新闻信息!');windows.history.go(-1);</script>"); } }

ILSpy2.4反编译框架为.NET Framework 4.5的dll出错

dll是用VS2012,框架是.NET Framework 4.5开发。用ILSpy2.4反编译dll提示错误: ICSharpCode.Decompiler.DecompilerException: Error decompiling System.Void PackageHeaderConverter::.ctor() ---> System.NullReferenceException: 未将对象引用设置到对象的实例。 在 ICSharpCode.Decompiler.CecilExtensions.GetPopDelta(Instruction instruction, MethodDefinition methodDef) 在 ICSharpCode.Decompiler.ILAst.ILAstBuilder.StackAnalysis(MethodDefinition methodDef) 在 ICSharpCode.Decompiler.ILAst.ILAstBuilder.Build(MethodDefinition methodDef, Boolean optimize, DecompilerContext context) 在 ICSharpCode.Decompiler.Ast.AstMethodBodyBuilder.CreateMethodBody(IEnumerable`1 parameters) 在 ICSharpCode.Decompiler.Ast.AstMethodBodyBuilder.CreateMethodBody(MethodDefinition methodDef, DecompilerContext context, IEnumerable`1 parameters) --- 内部异常堆栈跟踪的结尾 --- 在 ICSharpCode.Decompiler.Ast.AstMethodBodyBuilder.CreateMethodBody(MethodDefinition methodDef, DecompilerContext context, IEnumerable`1 parameters) 在 ICSharpCode.Decompiler.Ast.AstBuilder.CreateConstructor(MethodDefinition methodDef) 在 ICSharpCode.Decompiler.Ast.AstBuilder.AddTypeMembers(TypeDeclaration astType, TypeDefinition typeDef) 在 ICSharpCode.Decompiler.Ast.AstBuilder.CreateType(TypeDefinition typeDef) 在 ICSharpCode.Decompiler.Ast.AstBuilder.AddType(TypeDefinition typeDef) 在 ICSharpCode.ILSpy.CSharpLanguage.DecompileType(TypeDefinition type, ITextOutput output, DecompilationOptions options) 在 ICSharpCode.ILSpy.TextView.DecompilerTextView.DecompileNodes(DecompilationContext context, ITextOutput textOutput) 在 ICSharpCode.ILSpy.TextView.DecompilerTextView.<>c__DisplayClass31_0.<DecompileAsync>b__0()

System.NullReferenceException: '未将对象引用设置到对象的实例。'

刚学不久,自己写一个小项目,出现了这个异常 不知道是不是Session["UserId"]引起的 上网搜到一些解决方法试了试还是不成功 想请大家帮忙看一看 Controller下的ActionResult //Update Picture [HttpPost] public ActionResult UpdatePicture(PictureVM obj) { int userId = Convert.ToInt32(Session["UserId"]); if (userId == 0) { return RedirectToAction("Login", "Account"); } var file = obj.Picture; User u = db.Users.Find(userId); if( file != null) { //update the img var extension = Path.GetExtension(file.FileName); string id_and_extension = userId + extension; string imgUrl = "~/Profile_Images/" + id_and_extension; u.ImageUrl = imgUrl; db.Entry(u).State = EntityState.Modified; //* db.SaveChanges(); var path = Server.MapPath("~/Profile_Images/"); if (!Directory.Exists(path)) { Directory.CreateDirectory(path + id_and_extension); } //when update new img, delete old img if ((System.IO.File.Exists(path + id_and_extension))) //imgUrl { System.IO.File.Delete(path + id_and_extension); } file.SaveAs((path + id_and_extension)); } return RedirectToAction("UserProfile"); } ``` UserProfile.cshtml下关于ImageUrl的部分 <dt> @Html.DisplayNameFor(model => model.ImageUrl) </dt> <dd style="margin-top:15px"> @*@if(Model.ImageUrl.Length > 0)*@ @*System.NullReferenceException: '未将对象引用设置到对象的实例。' ClairG.ChatApp.Domain.Entities.User.ImageUrl.get returned null.*@ @if (Model.ImageUrl != null) //无法保存图片 { <img src="@Url.Content(Model.ImageUrl)" alt="No Image" style="height:200px" class="img-responsive img-circle" /> } <br /><br /> @using (Html.BeginForm("UpdatePicture", "User", FormMethod.Post, new { enctype = "multipart/form-data" })) { <input type="file" name="Picture class=" col-sm-2 form-control"" /> <input type="submit" value="Save Image" class="btn btn-default" /> } </dd> ```

c# System.NullReferenceException:“Object reference not set to an instance of an object.”

不知道为什么出现异常 ![图片说明](https://img-ask.csdn.net/upload/201811/07/1541597859_528784.png) ``` using System; namespace _12._1._3可空类型的装箱拆箱 { class Program { static void Main(string[] args) { Console.WriteLine("可空的类型的装箱拆箱如下:"); BoxdandUnboxed(); Console.Read(); } public static void BoxdandUnboxed() { Nullable<int> nullable = 5; int? nullablewithoutvale = null; Console.WriteLine("获取不为null的可空类型为{0}",nullable.GetType()); Console.WriteLine("获取为null的可空类型为:{0}", nullablewithoutvale.GetType()); object obj = nullable; Console.WriteLine("装箱后obj的类型为{0}",obj.GetType()); int value = (int)obj; Console.WriteLine("拆箱后非可空变量的情况为{0}",value); nullable = (int?)obj; Console.WriteLine("拆箱后可空变量的情况为{0}",nullable); obj = nullablewithoutvale; Console.WriteLine("对null的可空类型装箱后obj是否为null:{0}",obj==null); nullable = (int?)obj; Console.WriteLine("一个没有值的可空类型装箱后,拆成可空变量是否为null:{0}",nullable==null); } } } ```

未将对象引用设置到对象的实例。

未将对象引用设置到对象的实例。 说明: 执行当前 Web 请求期间,出现未经处理的异常。请检查堆栈跟踪信息,以了解有关该错误以及代码中导致错误的出处的详细信息。 异常详细信息: System.NullReferenceException: 未将对象引用设置到对象的实例。 源错误: 行 20: string userName = StrHelper.ConvertSql(UserName.Text.ToString()); 行 21: string userPwd = StrHelper.EncryptPassword(PassWord.Text.ToString(), StrHelper.PasswordType.MD5); 行 22: if (bs.isLoginValidate(userName, userPwd)) 行 23: { 行 24: 源文件: d:\wgm\vs\text\web\Login.aspx.cs 行: 22 堆栈跟踪: [NullReferenceException: 未将对象引用设置到对象的实例。] Leyp.SQLServerDAL.UserDAL.isExistsUserName(String UserName) in C:\Users\yuqin\Desktop\Leyipai\SQLServerDAL\UserDAL.cs:181 Leyp.SQLServerDAL.UserDAL.isLoginValidate(String UserName, String PassWord) in C:\Users\yuqin\Desktop\Leyipai\SQLServerDAL\UserDAL.cs:207 Login.LoginButton_Click(Object sender, ImageClickEventArgs e) in d:\wgm\vs\text\web\Login.aspx.cs:22 System.Web.UI.WebControls.ImageButton.OnClick(ImageClickEventArgs e) +115 System.Web.UI.WebControls.ImageButton.RaisePostBackEvent(String eventArgument) +120 System.Web.UI.WebControls.ImageButton.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10 System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13 System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +36 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5563 #**_在这里分享一下我这问题的原因:是因为我的数据库表不全。希望能帮到后来人。_**#

应用程序中的服务器错误,未将对象引用设置到对象的实例。应该怎么改,我是一个小白。谢谢大家

说明: 执行当前 Web 请求期间,出现未处理的异常。请检查堆栈跟踪信息,以了解有关该错误以及代码中导致错误的出处的详细信息。 异常详细信息: System.NullReferenceException: 未将对象引用设置到对象的实例。 源错误: 行 33: DataSet result = new DataSet(); 行 34: result = new Class1().hsggetdata(sql); 行 35: ngg = result.Tables[0].Rows[0][0].ToString(); 行 36: } 行 37: string sqllb = "select distinct(leibie) from allgonggao"; 堆栈跟踪: [NullReferenceException: 未将对象引用设置到对象的实例。] qtleft.Page_Load(Object sender, EventArgs e) in c:\Users\qtleft.ascx.cs:35 System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14 System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35 System.Web.UI.Control.OnLoad(EventArgs e) +99 System.Web.UI.Control.LoadRecursive() +50 System.Web.UI.Control.LoadRecursive() +141 System.Web.UI.Control.LoadRecursive() +141 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +627

软件登录时提示System.NullReferenceException未被引用到实例

![图片说明](https://img-ask.csdn.net/upload/201904/19/1555644735_976122.png) 测试了很多电脑大部分可以登录,个别电脑登录时提示这个错误,重新装了NET插件和Access数据库还是不行,本人完全菜鸟一枚求大神帮帮忙啊,解决不了急死了~~~~ ee the end of this message for details on invoking just-in-time (JIT) debugging instead of this dialog box. ************** Exception Text ************** ee the end of this message for details on invoking just-in-time (JIT) debugging instead of this dialog box. ************** Exception Text ************** System.NullReferenceException: Object reference not set to an instance of an object. at Emergency.Module.setControls(Single newx, Single newy, Control cons) in d:\Users\Desktop\站务中心应急辅助系统测试版\Emergency\Class\Module.cs:line 2944 at Emergency.FormMain.FormMain_Resize(Object sender, EventArgs e) in d:\Users\Desktop\站务中心应急辅助系统测试版\Emergency\DataForm\FormMain.cs:line 49 at System.Windows.Forms.Control.OnResize(EventArgs e) at System.Windows.Forms.Form.OnResize(EventArgs e) at System.Windows.Forms.Control.OnSizeChanged(EventArgs e) at System.Windows.Forms.Control.UpdateBounds(Int32 x, Int32 y, Int32 width, Int32 height, Int32 clientWidth, Int32 clientHeight) at System.Windows.Forms.Control.UpdateBounds(Int32 x, Int32 y, Int32 width, Int32 height) at System.Windows.Forms.Control.SetBoundsCore(Int32 x, Int32 y, Int32 width, Int32 height, BoundsSpecified specified) at System.Windows.Forms.Form.SetBoundsCore(Int32 x, Int32 y, Int32 width, Int32 height, BoundsSpecified specified) at System.Windows.Forms.Control.ScaleControl(SizeF factor, BoundsSpecified specified) at System.Windows.Forms.ScrollableControl.ScaleControl(SizeF factor, BoundsSpecified specified) at System.Windows.Forms.Form.ScaleControl(SizeF factor, BoundsSpecified specified) at System.Windows.Forms.Control.ScaleControl(SizeF includedFactor, SizeF excludedFactor, Control requestingControl) at System.Windows.Forms.ContainerControl.Scale(SizeF includedFactor, SizeF excludedFactor, Control requestingControl) at System.Windows.Forms.ContainerControl.PerformAutoScale(Boolean includedBounds, Boolean excludedBounds) at System.Windows.Forms.ContainerControl.PerformNeededAutoScaleOnLayout() at System.Windows.Forms.ContainerControl.OnLayoutResuming(Boolean performLayout) at System.Windows.Forms.Control.ResumeLayout(Boolean performLayout) at Emergency.FormMain.InitializeComponent() in d:\Users\Desktop\站务中心应急辅助系统测试版\Emergency\DataForm\FormMain.Designer.cs:line 2355 at Emergency.FormMain..ctor() in d:\Users\Desktop\站务中心应急辅助系统测试版\Emergency\DataForm\FormMain.cs:line 17 at Emergency.FormLogin.button1_Click(Object sender, EventArgs e) in d:\Users\Desktop\站务中心应急辅助系统测试版\Emergency\DataForm\FormLogin.cs:line 47 at System.Windows.Forms.Control.OnClick(EventArgs e) at System.Windows.Forms.Button.OnClick(EventArgs e) at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent) at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks) at System.Windows.Forms.Control.WndProc(Message& m) at System.Windows.Forms.ButtonBase.WndProc(Message& m) at System.Windows.Forms.Button.WndProc(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m) at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) ************** Loaded Assemblies ************** mscorlib Assembly Version: 4.0.0.0 Win32 Version: 4.0.30319.34209 built by: FX452RTMGDR CodeBase: file:///C:/Windows/Microsoft.NET/Framework/v4.0.30319/mscorlib.dll ---------------------------------------- Emergency Assembly Version: 1.0.0.0 Win32 Version: 1.0.0.0 CodeBase: file:///G:/%E9%99%84%E4%BB%B61%EF%BC%9A%E5%BA%94%E6%80%A5%E8%BE%85%E5%8A%A9%E7%B3%BB%E7%BB%9FV1.0%E5%AE%89%E8%A3%85%E5%8C%85/%E5%BA%94%E6%80%A5%E8%BE%85%E5%8A%A9%E7%B3%BB%E7%BB%9FV1.0%E5%AE%89%E8%A3%85%E5%8C%85/%E5%BA%94%E6%80%A5%E8%BE%85%E5%8A%A9%E7%B3%BB%E7%BB%9FV1.0/%E5%BA%94%E6%80%A5%E8%BE%85%E5%8A%A9%E7%B3%BB%E7%BB%9FV1.0.exe ---------------------------------------- System.Windows.Forms Assembly Version: 4.0.0.0 Win32 Version: 4.0.30319.34209 built by: FX452RTMGDR CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Windows.Forms/v4.0_4.0.0.0__b77a5c561934e089/System.Windows.Forms.dll ---------------------------------------- System.Drawing Assembly Version: 4.0.0.0 Win32 Version: 4.0.30319.34209 built by: FX452RTMGDR CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Drawing/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll ---------------------------------------- System Assembly Version: 4.0.0.0 Win32 Version: 4.0.30319.34209 built by: FX452RTMGDR CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System/v4.0_4.0.0.0__b77a5c561934e089/System.dll ---------------------------------------- System.Data Assembly Version: 4.0.0.0 Win32 Version: 4.0.30319.34209 built by: FX452RTMGDR CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_32/System.Data/v4.0_4.0.0.0__b77a5c561934e089/System.Data.dll ---------------------------------------- System.Core Assembly Version: 4.0.0.0 Win32 Version: 4.0.30319.34209 built by: FX452RTMGDR CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Core/v4.0_4.0.0.0__b77a5c561934e089/System.Core.dll ---------------------------------------- System.Transactions Assembly Version: 4.0.0.0 Win32 Version: 4.0.30319.34209 built by: FX452RTMGDR CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_32/System.Transactions/v4.0_4.0.0.0__b77a5c561934e089/System.Transactions.dll ---------------------------------------- System.EnterpriseServices Assembly Version: 4.0.0.0 Win32 Version: 4.0.30319.34209 built by: FX452RTMGDR CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_32/System.EnterpriseServices/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.EnterpriseServices.dll ---------------------------------------- System.Configuration Assembly Version: 4.0.0.0 Win32 Version: 4.0.30319.34209 built by: FX452RTMGDR CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Configuration/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll ---------------------------------------- System.Xml Assembly Version: 4.0.0.0 Win32 Version: 4.0.30319.34209 built by: FX452RTMGDR CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Xml/v4.0_4.0.0.0__b77a5c561934e089/System.Xml.dll ---------------------------------------- ************** JIT Debugging ************** To enable just-in-time (JIT) debugging, the .config file for this application or computer (machine.config) must have the jitDebugging value set in the system.windows.forms section.: Object reference not set to an instance of an object. at Emergency.Module.setControls(Single newx, Single newy, Control cons) in d:\Users\Desktop\站务中心应急辅助系统测试版\Emergency\Class\Module.cs:line 2944 at Emergency.FormMain.FormMain_Resize(Object sender, EventArgs e) in d:\Users\Desktop\站务中心应急辅助系统测试版\Emergency\DataForm\FormMain.cs:line 49 at System.Windows.Forms.Control.OnResize(EventArgs e) at System.Windows.Forms.Form.OnResize(EventArgs e) at System.Windows.Forms.Control.OnSizeChanged(EventArgs e) at System.Windows.Forms.Control.UpdateBounds(Int32 x, Int32 y, Int32 width, Int32 height, Int32 clientWidth, Int32 clientHeight) at System.Windows.Forms.Control.UpdateBounds(Int32 x, Int32 y, Int32 width, Int32 height) at System.Windows.Forms.Control.SetBoundsCore(Int32 x, Int32 y, Int32 width, Int32 height, BoundsSpecified specified) at System.Windows.Forms.Form.SetBoundsCore(Int32 x, Int32 y, Int32 width, Int32 height, BoundsSpecified specified) at System.Windows.Forms.Control.ScaleControl(SizeF factor, BoundsSpecified specified) at System.Windows.Forms.ScrollableControl.ScaleControl(SizeF factor, BoundsSpecified specified) at System.Windows.Forms.Form.ScaleControl(SizeF factor, BoundsSpecified specified) at System.Windows.Forms.Control.ScaleControl(SizeF includedFactor, SizeF excludedFactor, Control requestingControl) at System.Windows.Forms.ContainerControl.Scale(SizeF includedFactor, SizeF excludedFactor, Control requestingControl) at System.Windows.Forms.ContainerControl.PerformAutoScale(Boolean includedBounds, Boolean excludedBounds) at System.Windows.Forms.ContainerControl.PerformNeededAutoScaleOnLayout() at System.Windows.Forms.ContainerControl.OnLayoutResuming(Boolean performLayout) at System.Windows.Forms.Control.ResumeLayout(Boolean performLayout) at Emergency.FormMain.InitializeComponent() in d:\Users\Desktop\站务中心应急辅助系统测试版\Emergency\DataForm\FormMain.Designer.cs:line 2355 at Emergency.FormMain..ctor() in d:\Users\Desktop\站务中心应急辅助系统测试版\Emergency\DataForm\FormMain.cs:line 17 at Emergency.FormLogin.button1_Click(Object sender, EventArgs e) in d:\Users\Desktop\站务中心应急辅助系统测试版\Emergency\DataForm\FormLogin.cs:line 47 at System.Windows.Forms.Control.OnClick(EventArgs e) at System.Windows.Forms.Button.OnClick(EventArgs e) at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent) at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks) at System.Windows.Forms.Control.WndProc(Message& m) at System.Windows.Forms.ButtonBase.WndProc(Message& m) at System.Windows.Forms.Button.WndProc(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m) at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) ************** Loaded Assemblies ************** mscorlib Assembly Version: 4.0.0.0 Win32 Version: 4.0.30319.34209 built by: FX452RTMGDR CodeBase: file:///C:/Windows/Microsoft.NET/Framework/v4.0.30319/mscorlib.dll ---------------------------------------- Emergency Assembly Version: 1.0.0.0 Win32 Version: 1.0.0.0 CodeBase: file:///G:/%E9%99%84%E4%BB%B61%EF%BC%9A%E5%BA%94%E6%80%A5%E8%BE%85%E5%8A%A9%E7%B3%BB%E7%BB%9FV1.0%E5%AE%89%E8%A3%85%E5%8C%85/%E5%BA%94%E6%80%A5%E8%BE%85%E5%8A%A9%E7%B3%BB%E7%BB%9FV1.0%E5%AE%89%E8%A3%85%E5%8C%85/%E5%BA%94%E6%80%A5%E8%BE%85%E5%8A%A9%E7%B3%BB%E7%BB%9FV1.0/%E5%BA%94%E6%80%A5%E8%BE%85%E5%8A%A9%E7%B3%BB%E7%BB%9FV1.0.exe ---------------------------------------- System.Windows.Forms Assembly Version: 4.0.0.0 Win32 Version: 4.0.30319.34209 built by: FX452RTMGDR CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Windows.Forms/v4.0_4.0.0.0__b77a5c561934e089/System.Windows.Forms.dll ---------------------------------------- System.Drawing Assembly Version: 4.0.0.0 Win32 Version: 4.0.30319.34209 built by: FX452RTMGDR CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Drawing/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll ---------------------------------------- System Assembly Version: 4.0.0.0 Win32 Version: 4.0.30319.34209 built by: FX452RTMGDR CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System/v4.0_4.0.0.0__b77a5c561934e089/System.dll ---------------------------------------- System.Data Assembly Version: 4.0.0.0 Win32 Version: 4.0.30319.34209 built by: FX452RTMGDR CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_32/System.Data/v4.0_4.0.0.0__b77a5c561934e089/System.Data.dll ---------------------------------------- System.Core Assembly Version: 4.0.0.0 Win32 Version: 4.0.30319.34209 built by: FX452RTMGDR CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Core/v4.0_4.0.0.0__b77a5c561934e089/System.Core.dll ---------------------------------------- System.Transactions Assembly Version: 4.0.0.0 Win32 Version: 4.0.30319.34209 built by: FX452RTMGDR CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_32/System.Transactions/v4.0_4.0.0.0__b77a5c561934e089/System.Transactions.dll ---------------------------------------- System.EnterpriseServices Assembly Version: 4.0.0.0 Win32 Version: 4.0.30319.34209 built by: FX452RTMGDR CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_32/System.EnterpriseServices/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.EnterpriseServices.dll ---------------------------------------- System.Configuration Assembly Version: 4.0.0.0 Win32 Version: 4.0.30319.34209 built by: FX452RTMGDR CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Configuration/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll ---------------------------------------- System.Xml Assembly Version: 4.0.0.0 Win32 Version: 4.0.30319.34209 built by: FX452RTMGDR CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Xml/v4.0_4.0.0.0__b77a5c561934e089/System.Xml.dll ---------------------------------------- ************** JIT Debugging ************** To enable just-in-time (JIT) debugging, the .config file for this application or computer (machine.config) must have the jitDebugging value set in the system.windows.forms section.

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谁能帮我C#一段程序调试成功,报错未将对象引用实例化....

![图片说明](https://img-ask.csdn.net/upload/201512/29/1451392315_154027.jpg) ![图片说明](https://img-ask.csdn.net/upload/201512/29/1451392720_799210.jpg)

未将对象引用设置到对象的实例,找不到哪里为NULL啊

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