Telerik WinForms RadGridView号码列首键非数字输入校验失效如何解决

问题根因 #

RadGridView通过键盘触发单元格编辑时，执行顺序为：

1. 捕获用户按下的字符
2. 初始化编辑器，将捕获的字符写入编辑器输入框
3. 触发CellEditorInitialized事件
   原有代码在CellEditorInitialized中绑定KeyPress事件，已经错过了首个字符的校验，导致非数字首字符可以被输入。

方案1：使用内置RadMaskedEditBoxEditor（推荐） #

直接给目标列指定带数字掩码的编辑器，从根源上避免校验时机的问题，无需手动处理按键事件，稳定性更高：

// 窗体初始化或网格数据绑定完成后执行一次即可
private void Form1_Load(object sender, EventArgs e)
{
    var phoneColumn = radGridView1.Columns["column1"] as GridViewTextBoxColumn;
    phoneColumn.EditorRequired += (s, args) =>
    {
        var editor = new RadMaskedEditBoxEditor();
        // 配置为纯数字输入，最多11位，适配国内手机号规则
        editor.MaskType = MaskType.Numeric;
        editor.Mask = "D11";
        editor.MaskedEditBoxElement.TextMaskFormat = MaskFormat.ExcludePromptAndLiterals;
        args.Editor = editor;
    };
}

方案2：修复原有KeyPress逻辑的绑定时机 #

如果需要保留自定义的按键校验逻辑，将事件绑定提前到CellBeginEdit事件即可，同时记得编辑结束后解绑避免内存泄漏：

private void radGridView1_CellBeginEdit(object sender, GridViewCellCancelEventArgs e)
{
    if (e.Column.Name != "column1") return;
    
    var editor = new RadTextBoxEditor();
    radGridView1.ActiveEditor = editor;
    var element = editor.EditorElement as RadTextBoxEditorElement;
    element.TextBoxItem.KeyPress -= TextBoxItem_KeyPress;
    element.TextBoxItem.KeyPress += TextBoxItem_KeyPress;
}

private void TextBoxItem_KeyPress(object sender, KeyPressEventArgs e)
{
    if (!char.IsControl(e.KeyChar) && !char.IsDigit(e.KeyChar))
    {
        e.Handled = true;
    }
}

private void radGridView1_CellEndEdit(object sender, GridViewCellEventArgs e)
{
    if (e.Column.Name != "column1" || e.ActiveEditor == null) return;
    
    var editor = e.ActiveEditor as RadTextBoxEditor;
    var element = editor.EditorElement as RadTextBoxEditorElement;
    element.TextBoxItem.KeyPress -= TextBoxItem_KeyPress;
}

内容的提问来源于stack exchange，提问作者Mirzaie.rz