mscorlib.dll中发生未处理的“System.ArgumentOutOfRangeException”类型异常 [英] An unhandled exception of type 'System.ArgumentOutOfRangeException' occurred in mscorlib.dll

问题描述

  private   void  btnmodi_Click（对象发​​件人，EventArgs e）
 {
  if （radGridView1.RowCount <  =  0 ）
 {
 
 MessageBox.Show（ 选择Record to Updae， ）; 
  return ; 
} 
 
 如果（blUpdate ==  true ）
 {
 btnmodi.Text =  & Update; 
 blUpdate =  false ; 
 
 
 txtCode.Text = radGridView1.SelectedCells [ 0 ]。Value.ToString（）; 
 txtcatagory.Text = radGridView1.SelectedCells [ 1 ]。Value.ToString（）; 
 
 
 
 btndele.Enabled =  false ; 
 btnsav.Enabled =  false ; 
 txtCode.Enabled =  false ; 
 txtCode.Focus（）; 
} 
  else  
 {
 btnmodi.Text =  & Edit; 
 blUpdate =  true ; 
 
 {
 SqlConnection cn =  new  SqlConnection（Program.myConnection）; 
  string  sql =  更新学生集代码= @ code，catagory = @ catagory，其中code = + radGridView1.SelectedCells [ 0 ]。Value.ToString（）; 
 
 SqlCommand cmd =  new  SqlCommand（sql，cn）; 
 
 
 
 cmd.Parameters.AddWithValue（  @ code ，txtCode.Text.Trim（））; 
 cmd.Parameters.AddWithValue（  @ catagory，txtcatagory.Text.Trim（） ）; 
 
 
 
 尝试 
 {
 cn.Open（）; 
 cmd.ExecuteNonQuery（）; 
 MessageBox.Show（ 数据已在数据库中成功更新。， 更新记录，MessageBoxButtons.OK，MessageBoxIcon.Information）; 
 
 
} 
  catch （Exception ex）
 {
 MessageBox.Show（ex 。信息）; 
} 
 最后 
 {
 cn.Close（）; 
 cmd.Dispose（）; 
 
 fillGrid（）; 
 btnsav.Enabled =  true ; 
 btndele.Enabled =  true ; 
 txtCode.Enabled =  true ; 
 txtCode.Focus（）; 
 
 
} 
} 
} 
} 

解决方案

< blockquote>可能是你正在使用的超出范围的索引，例如：

 radGridView1.SelectedCells [ 1 ] 

如果位置1没有元素（数组中的第二个元素），
将抛出该异常。



您可以通过调试来提供更多信息，以查看抛出异常的确切行。



干杯，

C

private void btnmodi_Click(object sender, EventArgs e)
        {
            if (radGridView1.RowCount <= 0)
            {

                MessageBox.Show(" Select Record to Updae","" );
                return;
            }

            if (blUpdate == true)
            {
                btnmodi.Text = "&Update";
                blUpdate = false;


                txtCode.Text = radGridView1.SelectedCells[0].Value.ToString();
                txtcatagory.Text = radGridView1.SelectedCells[1].Value.ToString();



                btndele.Enabled = false;
                btnsav.Enabled = false;
                txtCode.Enabled = false;
                txtCode.Focus();
            }
            else
            {
                btnmodi.Text = "&Edit";
                blUpdate = true;

                {
                    SqlConnection cn = new SqlConnection(Program.myConnection);
                    string sql = "update student set code=@code,catagory=@catagory,  where code=" + radGridView1.SelectedCells[0].Value.ToString();

                    SqlCommand cmd = new SqlCommand(sql, cn);



                    cmd.Parameters.AddWithValue("@code", txtCode.Text.Trim());
                    cmd.Parameters.AddWithValue("@catagory", txtcatagory.Text.Trim());
              


                    try
                    {
                        cn.Open();
                        cmd.ExecuteNonQuery();
                        MessageBox.Show("Data has been update successfully in database.", "Update Record", MessageBoxButtons.OK, MessageBoxIcon.Information);


                    }
                    catch (Exception ex)
                    {
                        MessageBox.Show(ex.Message);
                    }
                    finally
                    {
                        cn.Close();
                        cmd.Dispose();

                        fillGrid();
                        btnsav.Enabled = true;
                        btndele.Enabled = true;
                        txtCode.Enabled = true;
                        txtCode.Focus();
                        

                    }
                }
            }
        }

解决方案

Might be an index you are using that is out of bounds, e.g.:

radGridView1.SelectedCells[1]

will throw that exception if there is no element at position 1 (second element in the array).

You can provide more information by debugging to see the exact line in which the exception is being thrown.

Cheers,
C

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