Question

我想知道当我点击contextMenuStrip（1项名为clear）时是否有任何方法可以清除文本框。我有4个文本框，我已经为所有文本框提供了相同的contextMenuStrip名称。在运行应用程序时，我向textbox1添加了一些文本。当我右键单击textbox1并选择clear（contextMenuStripItem）时，应清除所有文本。同样，当我右键单击textbox2并选择clear时，应清除所有文本。我在winforms VS2010编程

提前致谢：）

编辑：我尝试的代码可能没有正确的命名约定：

在Designer.cs中

        // contextMenuStrip1
        // 
        this.contextMenuStrip1.Items.AddRange(new System.Windows.Forms.ToolStripItem[] {
        this.clearToolStripMenuItem});
        this.contextMenuStrip1.Name = "contextMenuStrip1";
        this.contextMenuStrip1.Size = new System.Drawing.Size(100, 26);
        // 
        // textBox1
        // 
        this.textBox1.ContextMenuStrip = this.contextMenuStrip1;
        this.textBox1.Location = new System.Drawing.Point(224, 191);
        this.textBox1.Name = "textBox1";
        this.textBox1.Size = new System.Drawing.Size(100, 20);
        this.textBox1.TabIndex = 8;
        // 
        // clearToolStripMenuItem
        // 
        this.clearToolStripMenuItem.Name = "clearToolStripMenuItem";
        this.clearToolStripMenuItem.Size = new System.Drawing.Size(152, 22);
        this.clearToolStripMenuItem.Text = "clear";
        this.clearToolStripMenuItem.Click += new System.EventHandler(this.clearToolStripMenuItem_Click);
this.Controls.Add(this.textBox1);


   private System.Windows.Forms.ContextMenuStrip contextMenuStrip1;
    private System.Windows.Forms.ToolStripMenuItem clearToolStripMenuItem;
    private System.Windows.Forms.TextBox textBox1;

在Form.cs中

 private void clearToolStripMenuItem_Click(object sender, EventArgs e)
    {
        ToolStripItem menuItem = sender as ToolStripItem;
        if (menuItem != null)
        {
            ContextMenuStrip owner = menuItem.Owner as ContextMenuStrip;
            if (owner != null)
            {
                Control sourceControl = owner.SourceControl;
                MessageBox.Show(sourceControl.Name);
                MessageBox.Show(sourceControl.Text);
            }
        }

    }

所以当我右键单击textBox1时，它会显示其文本和名称。所以我的问题是如何清除该文本。为所有文本框设置相同的contextMenu并清除文本是否有用，或者我必须为不同的文本框使用不同的contextMenu。

Answer 1

替换

Control sourceControl = owner.SourceControl;

与

TextBox sourceControl = owner.SourceControl as TextBox;
sourceControl.Text = string.Empty;    
// or   sourceControl.Clear();

如何使用contextmenuStrip清除文本框文本

1 个答案: