【求助】DataGridView运行时动态列宽的保存

Question

DataGridView在绑定了数据并显示出来，这时候每一列的宽度是默认的宽度，现在通过鼠标对其列进行操作，拖动改变了其中某几列的宽度，这时候列的宽度是你拖动之后的。然后DataGridView的DataSource改变了，数据重新显示出来的时候，每一列的宽度又变成了默认的宽度。
问：能不能在DataSource改变之后，让DataGridView的列宽度依然是你通过鼠标拖动之后的列的宽度？

Answer 1

运行看看吧，就是这么个思路现在只能保存一列的列宽，你把help改成help[]的方式就可以满足你的需求了
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;namespace WindowsApplication12
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void InitializeComponent()
        {
            this.dataGridView1 = new System.Windows.Forms.DataGridView();
            this.button1 = new System.Windows.Forms.Button();
            ((System.ComponentModel.ISupportInitialize)(this.dataGridView1)).BeginInit();
            this.SuspendLayout();
            // 
            // dataGridView1
            // 
            this.dataGridView1.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
            this.dataGridView1.Location = new System.Drawing.Point(28, 30);
            this.dataGridView1.Name = "dataGridView1";
            this.dataGridView1.RowTemplate.Height = 23;
            this.dataGridView1.Size = new System.Drawing.Size(240, 150);
            this.dataGridView1.TabIndex = 0;
            this.dataGridView1.ColumnWidthChanged += new System.Windows.Forms.DataGridViewColumnEventHandler(this.dataGridView1_ColumnWidthChanged);
            // 
            // button1
            // 
            this.button1.Location = new System.Drawing.Point(97, 219);
            this.button1.Name = "button1";
            this.button1.Size = new System.Drawing.Size(75, 23);
            this.button1.TabIndex = 1;
            this.button1.Text = "button1";
            this.button1.UseVisualStyleBackColor = true;
            this.button1.Click += new System.EventHandler(this.button1_Click);
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(292, 266);
            this.Controls.Add(this.button1);
            this.Controls.Add(this.dataGridView1);
            this.Name = "Form1";
            this.Text = "Form1";
            this.Load += new System.EventHandler(this.Form1_Load);
            ((System.ComponentModel.ISupportInitialize)(this.dataGridView1)).EndInit();
            this.ResumeLayout(false);        }
        Help h;
        private void dataGridView1_ColumnWidthChanged(object sender, DataGridViewColumnEventArgs e)
        {
            h = new Help();
            h.Width = e.Column.Width;
            h.ColName= e.Column.Name;
        }        private void Form1_Load(object sender, EventArgs e)
        {
            DataTable dt = new DataTable();
            dt.Columns.Add("1");
            dt.Columns.Add("2");
            for (int i = 0; i < 10; i++)
            {
                DataRow row = dt.NewRow();
                row["1"] = i.ToString();
                row["2"] = i.ToString() + "2";
                dt.Rows.Add(row);
            }
            Bind(dt);
        }        private void Bind(DataTable dt)
        {
            
            this.dataGridView1.DataSource = dt.DefaultView;
            if (h!=null)
            {
                this.dataGridView1.Columns[h.ColName].Width = h.Width;
            }
        }        private void button1_Click(object sender, EventArgs e)
        {
            DataTable dt = new DataTable();
            dt.Columns.Add("1");
            dt.Columns.Add("2");
            for (int i = 0; i < 10; i++)
            {
                DataRow row = dt.NewRow();
                row["1"] = i.ToString();
                row["2"] = i.ToString() + "3";
                dt.Rows.Add(row);
            }
            Bind(dt);
        }
    }
    class Help
    {
        private int _width;        public int Width
        {
            get { return _width; }
            set { _width = value; }
        }        private string _colName;        public string ColName
        {
            get { return _colName; }
            set { _colName = value; }
        }    }
}

Answer 2

wzp144650
 非常感谢你的思路，我把MSDN快翻烂了，总想找个属性设置一下就可以搞定，忘记了可以通过辅助类来保存设定。受教了。以后在开发的时候，不能再一棵树上吊死啊！呵呵