我做了一个图片转码入库，但是入库出来之后怎么把它解码放Image控件上，我能想到的方法就是解码到本地路径，然后放路径，但是可以实现不用解到本地，直接解码放到Image控件上啊求指点
页面代码如下：
<form id="form1" runat="server">
<div id="content">
<asp:FileUpload ID="Fu_Demo1" runat="server" />
<asp:TextBox ID="txt_imgname" runat="server" />
<asp:Button ID="Btn_Demo1" Text="获取" runat="server" OnClick="Btn_Demo1_Click" />
<asp:Repeater ID="rp_imagesShow" runat="server">
<ItemTemplate>
<div class="show">
<a href="#"><h3><%# Eval("Name") %></h3></a>
<asp:Image CssClass="imagesItem" ImageUrl="<%# Eval("Img") %>"" runat="server" />
</div>
</ItemTemplate>
</asp:Repeater>
</div>
</form>
我的转码代码如下：可以转成功，也可入库
if (string.IsNullOrEmpty(txt_imgname.Text))
{
Response.Write("<script>alert('请输入图片名！')</script>");
return;
}
string imgname = txt_imgname.Text.Trim();
string filename = Fu_Demo1.FileName;
string fix = filename.Substring(filename.LastIndexOf('.')+1).ToLower();
filename = Guid.NewGuid().ToString() + "." + fix;
string newpath = "MyFile/" + filename;
Fu_Demo1.SaveAs(Server.MapPath(newpath));
newpath = Server.MapPath(".")+"\\"+newpath;
if (File.Exists(newpath))
{
var byteArray = File.ReadAllBytes(newpath);
string base64str = Convert.ToBase64String(byteArray);
//Response.Write($"<script>alert('{base64str}')</script>");
string sql = $"insert ImagesToBase values('{imgname}','{base64str}')";
SqlConnection conn = new SqlConnection("Data Source=.;Initial Catalog=ImageToBase;Integrated Security=True");
conn.Open();
SqlCommand cmd = new SqlCommand(sql,conn);
int result= cmd.ExecuteNonQuery();
conn.Close();
if (result==1)
{
File.Delete(newpath);
if (!File.Exists(newpath))
{
Response.Write("<script>alert('新增成功！')</script>");
return;
}
}
Response.Write("<script>alert('新增失败！')</script>");
return;
}
Response.Write($"<script>alert('未找到文件！')</script>");
转码就是这样子了；
解码，我定义了个实体类对应数据库：
public class Images
{
public int Id { get; set; }
public string Name { get; set; }
public string Img { get; set; }
}
查询方法：
private DataTable GetAllImages()
{
string sql = $"select * from ImagesToBase";
SqlConnection conn = new SqlConnection("Data Source=.;Initial Catalog=ImageToBase;Integrated Security=True");
conn.Open();
SqlDataAdapter dap = new SqlDataAdapter(sql,conn);
DataSet ds = new DataSet();
dap.Fill(ds);
DataTable tab = ds.Tables[0];
conn.Close();
return tab;
}
解码这里，不会搞了，没头苍蝇乱撞，毫无办法：
List<Images> imgmods = new List<Images>();
DataTable dt = GetAllImages();
foreach (DataRow item in dt.Rows)
{
Images imgmod = new Images();
imgmod.Id = Convert.ToInt32(item["id"]);
imgmod.Name = item["name"].ToString();
string imgbackstr = item["img"].ToString();
var bt = Convert.FromBase64String(imgbackstr);
// 搞到这步咱不会搞了，求大佬解惑啊，如果我的思路不对，还请指导指导。
imgmods.Add(imgmod);
}
rp_imagesShow.DataSource = imgmods;
rp_imagesShow.DataBind();
