我的 Winform 中有一个 ListView,有 4 列,名称、金钱、ID 和级别。
问题是当我运行我的应用程序时,我仍然有能力弄乱列宽 并改变它们。
我搜索并发现我应该做这样的事情:
private void listView1_ColumnWidthChanging(object sender, ColumnWidthChangingEventArgs e)
{
e.Cancel = true;
e.NewWidth = listView1.Columns[e.ColumnIndex].Width;
}
但问题是,当我调试并取消列宽时,该事件甚至没有触发!
为什么不火?
如何固定列宽?
我制作了一个新的 winform 应用程序,以防万一我的旧应用程序出现问题, 它被触发,但仅在第一次运行应用程序时..这是代码:
namespace CsharpWinformTestingStuff
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
listView1.ColumnWidthChanging += new ColumnWidthChangingEventHandler(listView1_ColumnWidthChanging);
}
void listView1_ColumnWidthChanging(object sender, ColumnWidthChangingEventArgs e)
{
e.Cancel = true;
e.NewWidth = listView1.Columns[e.ColumnIndex].Width;
}
}
}
这里是初始化组件,以防万一您可能想知道:
private void InitializeComponent()
{
this.listView1 = new System.Windows.Forms.ListView();
this.columnHeader1 = ((System.Windows.Forms.ColumnHeader)(new System.Windows.Forms.ColumnHeader()));
this.columnHeader2 = ((System.Windows.Forms.ColumnHeader)(new System.Windows.Forms.ColumnHeader()));
this.columnHeader3 = ((System.Windows.Forms.ColumnHeader)(new System.Windows.Forms.ColumnHeader()));
this.SuspendLayout();
//
// listView1
//
this.listView1.Columns.AddRange(new System.Windows.Forms.ColumnHeader[] {
this.columnHeader1,
this.columnHeader2,
this.columnHeader3});
this.listView1.GridLines = true;
this.listView1.Location = new System.Drawing.Point(12, 12);
this.listView1.Name = "listView1";
this.listView1.Size = new System.Drawing.Size(284, 275);
this.listView1.TabIndex = 0;
this.listView1.UseCompatibleStateImageBehavior = false;
this.listView1.View = System.Windows.Forms.View.Details;
//
// columnHeader1
//
this.columnHeader1.Text = "Name";
this.columnHeader1.Width = 97;
//
// columnHeader2
//
this.columnHeader2.Text = "Age";
this.columnHeader2.Width = 52;
//
// columnHeader3
//
this.columnHeader3.Text = "Email";
this.columnHeader3.Width = 157;
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(308, 299);
this.Controls.Add(this.listView1);
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayout(false);
}
您需要在表单中注册 ColumnWidthChanging 事件:
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
// This line registers the event, soc that the form can "hear" it and call the indicated handling code:
this.listView1.ColumnWidthChanging += new ColumnWidthChangingEventHandler(listView1_ColumnWidthChanging);
}
void listView1_ColumnWidthChanging(object sender, ColumnWidthChangingEventArgs e)
{
Console.Write("Column Resizing");
e.NewWidth = this.listView1.Columns[e.ColumnIndex].Width;
e.Cancel = true;
}
}
您可以查看Better ListView Express。我们在列上实现了 AllowResize 属性,这正是您所需要的。
如果这里有人只想限制网格上的某些列,请使用此代码。
{
if (listView.Columns[e.ColumnIndex].Index == 3 || listView.Columns[e.ColumnIndex].Index == 4 || listView.Columns[e.ColumnIndex].Index == 5 || listView.Columns[e.ColumnIndex].Index == 6)
{
//Do nothihng
}
else
{
e.Cancel = true;
e.NewWidth = lvwItems.Columns[e.ColumnIndex].Width;
}
}