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視窗7（64位），.NET 4（32位應用程序）子類的ListView列0顯示在Windows損壞的文本7
我具有包括2列的子類System.Windows.Forms.ListView在顯示 「細節「視圖。只涉及文本字段。該列表包含約100 行。在初始顯示時，所有字段都被清晰地繪製，但當滾動或滾動時，第一列中某些字段的文本變爲 不可讀。它似乎被隨機線條和斑點覆蓋。
有什麼我可以做的，以確保文本清晰地繪製在0列？
當通過局域網使用遠程桌面時，效果會降低（清晰度得到改善）。 當在WAN上使用遠程桌面 時，效果消失（所有文本都清晰地繪製）。
ListView在Windows XP上總是繪製得很完美。
出於剝離測試的目的，列標題和DrawItem調用是根據。該方面的問題是OnDrawSubItem包括代碼
protected override void OnDrawSubItem(DrawListViewSubItemEventArgs e)
{
using (StringFormat sf = new StringFormat(StringFormatFlags.NoWrap))
{
Rectangle rect = new Rectangle(e.Bounds.Left
,e.Bounds.Top, e.Bounds.Width, e.Bounds.Height);
e.Graphics.DrawString(e.SubItem.Text, this.Font, Brushes.Black
,rect, sf);
}
base.OnDrawSubItem(e);
}
下面是再現問題的完整代碼：
using System;
using System.Windows.Forms;
using System.Drawing;
///
/// Build by saving to a file called LVTrial.cs and then executing "csc LVTrial.cs"
/// Scroll list up and down on a windows 7 box and the first column of text is corrupted.
///
class MyListView : ListView
{
Random randomiser = new Random();
private const int NUM_ROWS = 100;
private const int NUM_COLS = 2;
public MyListView()
{
this.Location = new System.Drawing.Point(23, 25);
this.OwnerDraw = true;
this.Size = new System.Drawing.Size(625, 387);
this.TabIndex = 0;
this.UseCompatibleStateImageBehavior = false;
this.View = System.Windows.Forms.View.Details;
for (int ii = 0; ii < NUM_COLS; ii++)
{
this.Columns.Add((
(System.Windows.Forms.ColumnHeader)(new System.Windows.Forms.ColumnHeader())));
}
for (int ii = 0; ii < NUM_ROWS; ii++)
{
this.Items.Add(new ListViewItem(
new string[NUM_COLS] { CreateRandomString(1, 6), CreateRandomString(1, 6) }));
}
}
protected override void OnDrawSubItem(DrawListViewSubItemEventArgs e)
{
using (StringFormat sf = new StringFormat(StringFormatFlags.NoWrap))
{
Rectangle rect = new Rectangle(e.Bounds.Left
,e.Bounds.Top, e.Bounds.Width, e.Bounds.Height);
e.Graphics.DrawString(e.SubItem.Text, this.Font, Brushes.Black
,rect, sf);
}
base.OnDrawSubItem(e);
}
private string CreateRandomString(int minLength, int maxLength)
{
string str = string.Empty;
int length = randomiser.Next(minLength, maxLength + 1);
for (int ii = 0; ii < length; ii++)
{
int asciiChar = randomiser.Next(32, 126); // ascii range
str += Convert.ToChar(asciiChar);
}
return str;
}
}
class LVTrial : Form
{
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new LVTrial());
}
private LVTrial()
{
MyListView myListView = new MyListView();
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(674, 440);
this.Controls.Add(myListView);
this.Text = "LVTrial";
}
}