datagrid datatable problem.

[clyyy2002]

if you not sort the grid and then click "del" button,no problem.
but if you sort the grid (column caption is "DNAME" ) first and then click
"del"
button, a exception occur(System.IndexOutOfRangeException) .

why?

underside is my program.

Thank.



using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace deldatagridcolumn
{
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.Button button2;
private System.ComponentModel.Container components = null;
private System.Windows.Forms.DataGrid grid;

DataTable dt = new DataTable("T");
public Form1()
{
InitializeComponent();
}

protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}

private void InitializeComponent()
{
this.grid = new System.Windows.Forms.DataGrid();
this.button2 = new System.Windows.Forms.Button();
((System.ComponentModel.ISupportInitialize)(this.grid)).BeginInit();
this.SuspendLayout();
//
// grid
//
this.grid.DataMember = "";
this.grid.HeaderForeColor = System.Drawing.SystemColors.ControlText;
this.grid.Location = new System.Drawing.Point(24, 16);
this.grid.Name = "grid";
this.grid.Size = new System.Drawing.Size(448, 288);
this.grid.TabIndex = 0;
//
// button2
//
this.button2.Location = new System.Drawing.Point(400, 312);
this.button2.Name = "button2";
this.button2.TabIndex = 2;
this.button2.Text = "Del";
this.button2.Click += new System.EventHandler(this.button2_Click);
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(504, 341);
this.Controls.Add(this.button2);
this.Controls.Add(this.grid);
this.Name = "Form1";
this.Text = "Form1";
this.Load += new System.EventHandler(this.Form1_Load);
((System.ComponentModel.ISupportInitialize)(this.grid)).EndInit();
this.ResumeLayout(false);

}

[STAThread]
static void Main()
{
Application.Run(new Form1());
}

private void Form1_Load(object sender, System.EventArgs e)
{

DataColumn dc = new DataColumn("dcode",typeof(string));
DataColumn dc1 = new DataColumn("dname",typeof(string));
dt.Columns.Add(dc);
dt.Columns.Add(dc1);
DataRow dr = dt.NewRow();
dr[0] = "aa";
dr[1] = "aa";
dt.Rows.Add(dr);

grid.DataSource = dt;

DataGridTableStyle myGridStyle = new DataGridTableStyle();
myGridStyle.MappingName = "T";


DataGridTextBoxColumn style = new DataGridTextBoxColumn();
style.MappingName = "dcode";
style.HeaderText = "DCODE";
style.Width = 100;
myGridStyle.GridColumnStyles.Add(style);

DataGridTextBoxColumn style1 = new DataGridTextBoxColumn();
style1.MappingName = "dname";
style1.HeaderText = "DName";
style1.Width = 100;

myGridStyle.GridColumnStyles.Add(style1);
grid.TableStyles.Add(myGridStyle);

}


private void button2_Click(object sender, System.EventArgs e)
{
if(dt.Columns.Count > 1)
{
dt.Columns.RemoveAt(1);
grid.TableStyles[0].GridColumnStyles.RemoveAt(1);
}
button2.Enabled = false;
}
}
}

 

[clyyy2002]

the reason is sort.

dt.DefaultView.Sort = "";
dt.Columns.RemoveAt(1);