ErrorText和ContextMenuStrip之间的交互

本文关键字:交互 之间 ContextMenuStrip ErrorText | 更新日期: 2023-09-27 17:59:21

我的应用程序有一个带有RowValidating事件处理程序的datagridview。如果我在RowValidating中设置了ErrorText,它正确地禁止左键单击其他行和其他控件,但如果我将ContextMenuStrip分配给另一个控件,ContextMenuStap将保持活动状态。用户可以用上下文菜单右键单击控件,选择一个菜单项,菜单事件就会启动。

我已经尝试了各种事件处理,但RowValidating事件在菜单出现之前不会触发,所以我不能只禁用RowValidating中的上下文菜单。每当用户触摸网格的任何部分时,我可能会禁用上下文菜单,但这还有其他陷阱。。。

我看了看,没有看到任何关于微软缺陷或解决方法的现有记录,甚至没有其他人遇到错误,所以我不确定我可能做错了什么。

简化示例:

 private void InitializeComponent()
    {
        this.components = new System.ComponentModel.Container();
        this.dataGridView1 = new System.Windows.Forms.DataGridView();
        this.contextMenuStrip1 = new System.Windows.Forms.ContextMenuStrip(this.components);
        this.menuItemToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
        this.textBox1 = new System.Windows.Forms.TextBox();
        this.Column1 = new System.Windows.Forms.DataGridViewTextBoxColumn();
        ((System.ComponentModel.ISupportInitialize)(this.dataGridView1)).BeginInit();
        this.contextMenuStrip1.SuspendLayout();
        this.SuspendLayout();
        this.dataGridView1.Columns.AddRange(new System.Windows.Forms.DataGridViewColumn[] {
        this.Column1});
        this.dataGridView1.RowValidating += new System.Windows.Forms.DataGridViewCellCancelEventHandler(this.dataGridView1_RowValidating);
        this.contextMenuStrip1.Items.AddRange(new System.Windows.Forms.ToolStripItem[] {
        this.menuItemToolStripMenuItem});
        this.menuItemToolStripMenuItem.Text = "Menu Item";
        this.textBox1.ContextMenuStrip = this.contextMenuStrip1;
        this.Controls.Add(this.textBox1);
        this.Controls.Add(this.dataGridView1);
        ((System.ComponentModel.ISupportInitialize)(this.dataGridView1)).EndInit();
        this.contextMenuStrip1.ResumeLayout(false);
        this.ResumeLayout(false);
        this.PerformLayout();
    }
    private System.Windows.Forms.DataGridView dataGridView1;
    private System.Windows.Forms.ContextMenuStrip contextMenuStrip1;
    private System.Windows.Forms.ToolStripMenuItem menuItemToolStripMenuItem;
    private System.Windows.Forms.TextBox textBox1;
    private System.Windows.Forms.DataGridViewTextBoxColumn Column1;

    private void dataGridView1_RowValidating(object sender, DataGridViewCellCancelEventArgs e)
    {
        if (!RowValid(dataGridView1.Rows[e.RowIndex]))
        {
            dataGridView1.Rows[e.RowIndex].ErrorText = "Value must be 5";
            e.Cancel = true;
        }
        else
        {
            dataGridView1.Rows[e.RowIndex].ErrorText = string.Empty;
            e.Cancel = false;
        }
    }
    private bool RowValid(DataGridViewRow row)
    {
        return string.Equals(row.Cells[0].Value, "5");
    }

作为参考,这些是按顺序触发的事件,注意在菜单打开之前不会进行验证:

dataGridView1_Enter
dataGridView1_RowEnter
dataGridView1_CellEnter
dataGridView1_CellBeginEdit
contextMenuStrip1_Opening

ErrorText和ContextMenuStrip之间的交互

处理ToolStripDropDown。打开事件,通过设置e.Cancel来确定上下文菜单是否应该显示。或者您可以禁用菜单项。