这是跟着视频博主打的DataGridView修改操作，但是博主打的时候没有报错而我的却报错了，实在找不出原因，只能麻烦大家帮帮忙啦，谢谢大家！
private void splitContainer1_Panel1_Paint(object sender, PaintEventArgs e)
{
}
DBHelper dbHelper = new DBHelper();
//加载窗体时，操作
SqlDataAdapter adapter = null;
DataSet ds = null;
private void FrmEdit_Load(object sender, EventArgs e)
{// TODO: 这行代码将数据加载到表“masterDataSet.ZC”中。您可以根据需要移动或移除它。
this.zCTableAdapter.Fill(this.masterDataSet.ZC);
//显示学生信息
String conStr = "Data Source=.;Initial Catalog=master;Integrated Security=True";
SqlConnection con = new SqlConnection(conStr);//实例化连接
con.Open();
string sql = "select * from ZC";
SqlCommand cmd = new SqlCommand(sql, con);//一个Sql语句
SqlDataAdapter adapter = new SqlDataAdapter(cmd);//数据适配器
DataSet ds = new DataSet();//DataSet表示数据在内存中的缓存
adapter.Fill(ds, "ZC");//适配器匹配数据
dgv_JZGList.DataSource = ds;//dataGridView1的数据源设为ds
dgv_JZGList.DataMember = "ZC";//绑定ds的表名
con.Close();//关闭数据库连接
con.Dispose();//释放资源
}
//修改
private void btnUpdate_Click(object sender, EventArgs e)
{
DialogResult result = MessageBox.Show("确定要修改吗？", "提示信息", MessageBoxButtons.YesNo);
if (result == DialogResult.Yes)
{
SqlCommandBuilder builder = new SqlCommandBuilder();//需要参数
adapter.Update(ds, "ZC");//修改数据集
}
}
//选中某行单元格（单击事件）
private void dgv_CellClick(object sender, DataGridViewCellEventArgs e)
{
if (dgv_JZGList.CurrentRow.Selected)
{
//将dgv中的行数据显示到修改编辑区域
//1.获取dgv行中的数据
int i = dgv_JZGList.CurrentRow.Index;
ZGH.Text = dgv_JZGList.Rows[i].Cells["ID"].Value.ToString();
MM.Text = dgv_JZGList.Rows[i].Cells["Pwd"].Value.ToString();
name.Text = dgv_JZGList.Rows[i].Cells["XM"].Value.ToString();
Sex.Text = dgv_JZGList.Rows[i].Cells["XB"].Value.ToString();
NL.Text = dgv_JZGList.Rows[i].Cells["Age"].Value.ToString();
DH.Text = dgv_JZGList.Rows[i].Cells["Phone"].Value.ToString();
cboCollege.Text = dgv_JZGList.Rows[i].Cells["CollegeID"].Value.ToString();
cboPosition.Text = dgv_JZGList.Rows[i].Cells["Position"].Value.ToString();
}
}
private void btnUpdataBC_Click(object sender, EventArgs e)
{
String conStr = "Data Source=.;Initial Catalog=master;Integrated Security=True";
SqlConnection con = new SqlConnection(conStr);//实例化连接
con.Open();
string sql = "updata ZC set txtID= '" + ZGH.Text + "', name= '" + name.Text + "',Sex= '" + Sex.Text + "',Age= '" + NL.Text + "',Phone= '" + DH.Text + "',CollegeID= '" + cboCollege.Text + "',PositionID = '" + cboPosition.Text + " ' where txtID= '" + ZGH.Text + "'";
SqlCommand cmd = new SqlCommand(sql, con);//一个Sql语句
int i = cmd.ExecuteNonQuery();
if （i > 0)
{
MessageBox.Show("修改成功");
}
else
{
MessageBox.Show("修改失败");
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