如何让XtraInputBox仅接受数值并判断点击的按钮？

Got it, let's tackle your two requirements step by step—restricting input to valid numbers/backspace and detecting which button the user clicked.

1. Restrict Input to Numeric Values & Backspace #

You have two straightforward ways to lock the XtraInputBox's text editor to only accept digits and backspace:

Option 1: Use Numeric Mask (Simplest Approach) #

Apply a built-in numeric mask directly to the editor in XtraInputBoxArgs—this handles input restriction automatically:

private void btnDown_Click(object sender, EventArgs e) { 
    XtraInputBoxArgs args = new XtraInputBoxArgs(); 
    args.Caption = "Quantité"; 
    args.Prompt = "Entrez la quantité"; 
    args.DefaultButtonIndex = 0; 
    args.DefaultResponse = gridView1.GetRowCellValue(gridView1.FocusedRowHandle, "Quantité Restante");

    // Add numeric mask to restrict input
    var textEdit = args.Editor as TextEdit;
    if (textEdit != null)
    {
        textEdit.Properties.Mask.MaskType = DevExpress.XtraEditors.Mask.MaskType.Numeric;
        textEdit.Properties.Mask.EditMask = "n0"; // Use "n2" if you need decimal support
        textEdit.Properties.Mask.UseMaskAsDisplayFormat = true;
    }

    var result= XtraInputBox.Show(args); 
} 

Option 2: Handle KeyPress Event (Full Control) #

If you want precise control over allowed keys, attach a KeyPress event to the editor to block non-numeric/non-backspace inputs:

private void btnDown_Click(object sender, EventArgs e) { 
    XtraInputBoxArgs args = new XtraInputBoxArgs(); 
    args.Caption = "Quantité"; 
    args.Prompt = "Entrez la quantité"; 
    args.DefaultButtonIndex = 0; 
    args.DefaultResponse = gridView1.GetRowCellValue(gridView1.FocusedRowHandle, "Quantité Restante");

    // Block invalid key presses
    var textEdit = args.Editor as TextEdit;
    if (textEdit != null)
    {
        textEdit.KeyPress += (s, ke) =>
        {
            // Allow digits and backspace; add '.' here if decimals are needed
            if (!char.IsDigit(ke.KeyChar) && ke.KeyChar != '\b')
            {
                ke.Handled = true; // Cancel the invalid key press
            }
        };
    }

    var result= XtraInputBox.Show(args); 
} 

2. Detect Which Button Was Clicked #

The XtraInputBox.Show() method returns a DialogResult that tells you exactly which button the user selected. You can also check args.DialogResult after the box closes:

private void btnDown_Click(object sender, EventArgs e) { 
    XtraInputBoxArgs args = new XtraInputBoxArgs(); 
    args.Caption = "Quantité"; 
    args.Prompt = "Entrez la quantité"; 
    args.DefaultButtonIndex = 0; 
    args.DefaultResponse = gridView1.GetRowCellValue(gridView1.FocusedRowHandle, "Quantité Restante");

    // Add your input restriction code here (either mask or KeyPress)

    var result = XtraInputBox.Show(args);

    // Check button click outcome
    if (result == DialogResult.OK)
    {
        // User clicked the default/OK button
        var inputValue = args.Result;
        // Process the valid input here
    }
    else if (result == DialogResult.Cancel)
    {
        // User clicked Cancel
        // Handle cancellation logic here
    }
} 

Quick Notes: #

• If you added custom buttons to args.Buttons, match the result to the button's DialogResult property to identify which one was clicked.
• Even with input restrictions, always validate the final input (e.g., check for empty values or out-of-range numbers) before processing it.

内容的提问来源于stack exchange，提问作者M.Bouabdallah