C＃列表框拖放行

Question

我想實現一個C＃拖放列表框的行重新排序。我在互聯網上遇到了一些代碼片段，但沒有一個能夠滿足我的需求。

我想讓你給我看一個如何在ListBox中移動行的示例代碼。

謝謝！

Answer 1

行的移動在方法「listBox1_MouseUp和listBox1_MouseDown做

使用視圖代碼更改此：

using System; 
using System.Collections.Generic; 
using System.ComponentModel; 
using System.Data; 
using System.Drawing; 
using System.Linq; 
using System.Text; 
using System.Windows.Forms; 

namespace Calculator 
{ 
    public partial class ComponentMover : Form 
    { 
     private Control trackedControl; 
     private int gridWidth = 100, gridHeight = 20; 
     private int row; 

     public ComponentMover() 
     { 
      this.InitializeComponent(); 
      this.InitializeDynamic(); 
     } 

     void draggable_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e) 
     { 
      if (this.trackedControl == null) 
       this.trackedControl = (Control)sender; 
     } 

     void draggable_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e) 
     { 
      if (this.trackedControl != null) 
      { 
       int x = e.X + this.trackedControl.Location.X; 
       int y = e.Y + this.trackedControl.Location.Y; 
       Point moved = new Point(x - x % this.gridWidth, y - y % this.gridHeight); 

       Console.WriteLine(e.X + ", " + e.Y + ", " + ", " + moved.X + ", " + moved.Y); 
       if (moved != this.trackedControl.Location) 
        this.trackedControl.Location = moved; 
      } 
     } 

     void draggable_MouseUp(object sender, MouseEventArgs e) 
     { 
      this.trackedControl = null; 
     } 

     private void AddDragListeners(Control draggable) 
     { 
      draggable.MouseDown += new MouseEventHandler(draggable_MouseDown); 
      draggable.MouseMove += new MouseEventHandler(draggable_MouseMove); 
      draggable.MouseUp += new MouseEventHandler(draggable_MouseUp); 
     } 
    } 
} 

設計師代碼：

namespace Calculator 
{ 
    // Designer code. 
    partial class ComponentMover 
    { 
     /// <summary> 
     /// Required designer variable. 
     /// </summary> 
     private System.ComponentModel.IContainer components = null; 

     /// <summary> 
     /// Clean up any resources being used. 
     /// </summary> 
     /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param> 
     protected override void Dispose(bool disposing) 
     { 
      if (disposing && (components != null)) 
      { 
       components.Dispose(); 
      } 
      base.Dispose(disposing); 
     } 

     private void InitializeDynamic() 
     { 
      this.AddDragListeners(button1); 
      this.AddDragListeners(button4); 
      this.AddDragListeners(domainUpDown1); 
      this.AddDragListeners(textBox1); 
      this.AddDragListeners(checkBox1); 
      this.AddDragListeners(radioButton1); 
     } 

     #region Windows Form Designer generated code 

     /// <summary> 
     /// Required method for Designer support - do not modify 
     /// the contents of this method with the code editor. 
     /// </summary> 
     private void InitializeComponent() 
     { 
      this.button1 = new System.Windows.Forms.Button(); 
      this.button4 = new System.Windows.Forms.Button(); 
      this.domainUpDown1 = new System.Windows.Forms.DomainUpDown(); 
      this.textBox1 = new System.Windows.Forms.TextBox(); 
      this.checkBox1 = new System.Windows.Forms.CheckBox(); 
      this.radioButton1 = new System.Windows.Forms.RadioButton(); 
      this.listBox1 = new System.Windows.Forms.ListBox(); 
      this.SuspendLayout(); 
      // 
      // button1 
      // 
      this.button1.Location = new System.Drawing.Point(13, 13); 
      this.button1.Name = "button1"; 
      this.button1.Size = new System.Drawing.Size(75, 23); 
      this.button1.TabIndex = 0; 
      this.button1.Text = "button1"; 
      this.button1.UseVisualStyleBackColor = true; 
      // 
      // button4 
      // 
      this.button4.Location = new System.Drawing.Point(177, 43); 
      this.button4.Name = "button4"; 
      this.button4.Size = new System.Drawing.Size(75, 23); 
      this.button4.TabIndex = 3; 
      this.button4.Text = "button4"; 
      this.button4.UseVisualStyleBackColor = true; 
      // 
      // domainUpDown1 
      // 
      this.domainUpDown1.Location = new System.Drawing.Point(95, 42); 
      this.domainUpDown1.Name = "domainUpDown1"; 
      this.domainUpDown1.Size = new System.Drawing.Size(74, 20); 
      this.domainUpDown1.TabIndex = 4; 
      this.domainUpDown1.Text = "domainUpDown1"; 
      // 
      // textBox1 
      // 
      this.textBox1.Location = new System.Drawing.Point(177, 72); 
      this.textBox1.Name = "textBox1"; 
      this.textBox1.Size = new System.Drawing.Size(100, 20); 
      this.textBox1.TabIndex = 5; 
      // 
      // checkBox1 
      // 
      this.checkBox1.AutoSize = true; 
      this.checkBox1.Location = new System.Drawing.Point(281, 13); 
      this.checkBox1.Name = "checkBox1"; 
      this.checkBox1.Size = new System.Drawing.Size(80, 17); 
      this.checkBox1.TabIndex = 6; 
      this.checkBox1.Text = "checkBox1"; 
      this.checkBox1.UseVisualStyleBackColor = true; 
      // 
      // radioButton1 
      // 
      this.radioButton1.AutoSize = true; 
      this.radioButton1.Location = new System.Drawing.Point(366, 42); 
      this.radioButton1.Name = "radioButton1"; 
      this.radioButton1.Size = new System.Drawing.Size(85, 17); 
      this.radioButton1.TabIndex = 7; 
      this.radioButton1.TabStop = true; 
      this.radioButton1.Text = "radioButton1"; 
      this.radioButton1.UseVisualStyleBackColor = true; 
      // 
      // listBox1 
      // 
      this.listBox1.FormattingEnabled = true; 
      this.listBox1.Items.AddRange(new object[] { 
      "word1", 
      "word2", 
      "word3"}); 
      this.listBox1.Location = new System.Drawing.Point(13, 42); 
      this.listBox1.Name = "listBox1"; 
      this.listBox1.Size = new System.Drawing.Size(76, 82); 
      this.listBox1.TabIndex = 8; 
      this.listBox1.MouseDown += new System.Windows.Forms.MouseEventHandler(listBox1_MouseDown); 
      this.listBox1.MouseUp += new System.Windows.Forms.MouseEventHandler(listBox1_MouseUp); 
      // 
      // ComponentMover 
      // 
      this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F); 
      this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; 
      this.ClientSize = new System.Drawing.Size(485, 159); 
      this.Controls.Add(this.listBox1); 
      this.Controls.Add(this.radioButton1); 
      this.Controls.Add(this.checkBox1); 
      this.Controls.Add(this.textBox1); 
      this.Controls.Add(this.domainUpDown1); 
      this.Controls.Add(this.button4); 
      this.Controls.Add(this.button1); 
      this.Name = "ComponentMover"; 
      this.Text = "ComponentMover"; 
      this.ResumeLayout(false); 
      this.PerformLayout(); 

     } 

     void listBox1_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e) 
     { 
      System.Windows.Forms.ListBox list = (System.Windows.Forms.ListBox)sender; 
      int swap = list.SelectedIndex; 

      if(swap != this.row) 
      { 
       string temp = (string)list.Items[this.row]; 
       list.Items[this.row] = list.Items[swap]; 
       list.Items[swap] = temp; 
      } 
     } 

     void listBox1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e) 
     { 
      this.row = ((System.Windows.Forms.ListBox)sender).SelectedIndex; 
     } 

     #endregion 

     private System.Windows.Forms.Button button1; 
     private System.Windows.Forms.Button button4; 
     private System.Windows.Forms.DomainUpDown domainUpDown1; 
     private System.Windows.Forms.TextBox textBox1; 
     private System.Windows.Forms.CheckBox checkBox1; 
     private System.Windows.Forms.RadioButton radioButton1; 
     private System.Windows.Forms.ListBox listBox1; 
    } 
}