创建一个 .net 2.0 Windows 窗体应用程序,在其窗体构造函数中添加一个 splitContainer 停靠填充:
public Form1()
{
InitializeComponent();
for (int i = 1; i <= 300; i++)
{
FlowLayoutPanel f = new FlowLayoutPanel();
f.Dock = DockStyle.Fill;
Button b = new Button();
f.Controls.Add(b);
splitContainer1.Panel2.Controls.Add(f);
}
}
按 F5。抓住表格的右下边缘并快速拖动以展开表格。由于在所有控件中都在完成工作,该表单会相当急速地扩展。
我有一个带有表单的应用程序,其中包含一些缓慢的控件,这些控件同样变得很慢。不同之处在于,在我的应用程序中,当我用鼠标拖出表单时,我会在间隙中出现几分之一秒的丑陋黑色空间。窗口未正确重新绘制。这个丑陋的黑色空间没有出现在上面的示例代码中。
任何想法在扩展慢速形式时可能会导致出现黑色空间?
我试过双缓冲,但这没什么区别。
编辑:我已将表格分解为基础,以便可以复制。启动一个名为 WindowsFormsApplication_SampleFault 的新 C# Windows 窗体应用程序。将下面的代码粘贴到 Form1.cs
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Reflection;
using System.Windows.Forms;
using System.Diagnostics;
using System.Security.Principal;
using System.Runtime.InteropServices;
namespace WindowsFormsApplication_SampleFault
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
for (int i = 1; i <= 200; i++)
{
Button b = new Button();
b.Dock = DockStyle.Fill;
this.Controls.Add(b);
}
}
}
}
然后将其粘贴到 Form1.Designer.cs
namespace WindowsFormsApplication_SampleFault
{
partial class Form1
{
/// <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);
}
#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.statusStrip1 = new System.Windows.Forms.StatusStrip();
this.SuspendLayout();
//
// statusStrip1
//
this.statusStrip1.Location = new System.Drawing.Point(0, 472);
this.statusStrip1.Name = "statusStrip1";
this.statusStrip1.Size = new System.Drawing.Size(756, 22);
this.statusStrip1.TabIndex = 6;
this.statusStrip1.Text = "statusStrip1";
//
// frmOptions
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(756, 494);
this.Controls.Add(this.statusStrip1);
this.DoubleBuffered = true;
this.ImeMode = System.Windows.Forms.ImeMode.Off;
this.MinimizeBox = false;
this.MinimumSize = new System.Drawing.Size(750, 500);
this.Name = "frmOptions";
this.ShowIcon = false;
this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
this.ResumeLayout(false);
this.PerformLayout();
}
#endregion
private System.Windows.Forms.StatusStrip statusStrip1;
}
}
按 F5 并尝试拖出表单。注意我故意超载重绘机制来产生黑色区域。
我相信表单设计器代码有问题,但我不确定是什么。