我正在尝试使用列表框实现C＃拖放行重新排序。我在互联网上遇到过一些代码片段，但似乎没有一个能满足我的需求。
我希望您向我展示一个如何在ListBox中移动行的示例代码。
谢谢！
答案 0 :(得分：1)
行的移动是在方法＆＃34; listBox1_MouseUp和listBox1_MouseDown中完成的。
使用视图代码更改此内容：
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);
}
}
}
设计师代码：
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;
}
}