ErrorText和ContextMenuStrip之间的交互

Question

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ErrorText，它会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，则ContextMenuStrip将保持活动状态。用户可以使用上下文菜单右键单击控件，选择菜单项，然后触发菜单事件。

我已尝试过各种事件处理，但RowValidating事件在菜单出现之前并未触发，因此我无法在RowValidating中禁用上下文菜单。我可以在用户触摸网格的任何部分时禁用上下文菜单，但这有其他陷阱......

我看过，我没有看到微软缺陷或变通办法上的任何现有文章，甚至是其他遇到错误的人，所以我不确定我做错了什么

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，在菜单打开之前不会发生注释验证：

dataGridView1_Enter
dataGridView1_RowEnter
dataGridView1_CellEnter
dataGridView1_CellBeginEdit
contextMenuStrip1_Opening

Answer 1

处理ToolStripDropDown.Opening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。