学步园

没办法了，好多地方找不到答案，csdn也没人回答，只有贴到这了。
斑竹手下留情，2天后移贴

如果你不排序，直接点击 “del“按钮，没有问题，可以正常删除。
但是如果你单击列名为 “Dname”的列，排了一下序，然后点击 “del“按钮，就发生一个异常，下面是我的代码。

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;
        }
    }
}