i have a masked text box control that is set for overwrite. i want to disable backspace and delete keys. to that end i added the following code to my form...
private void maskedTextBoxTime_KeyDown(object sender, KeyEventArgs e)
if (e.KeyCode == Keys.Back || e.KeyCode == Keys.Delete)
e.SuppressKeyPress = true;
however, when i run the application and set focus to the masked text box control, backspace and delete continue to function. what am i doing wrong here?
Historically MaskedTextBox has always bugs and issues related to it.
I did some test with your code and in effect DO NOT WORK, only if you eliminate the mask which has no point.
What i recomment use an alternative to enter the data. For time use DateTimePicker and set Format property to Time.
well, it is not my issue but I did reproduce it. I think you only have to draw the MaskedTextBox in a form, declare a mask and the KeyDown event.
hre is what you ask for:// // maskedTextBox1 // this.maskedTextBox1.Location = new System.Drawing.Point(320, 372); this.maskedTextBox1.Mask = "90:00"; this.maskedTextBox1.Name = "maskedTextBox1"; this.maskedTextBox1.Size = new System.Drawing.Size(94, 20); this.maskedTextBox1.TabIndex = 5; this.maskedTextBox1.ValidatingType = typeof(System.DateTime); this.maskedTextBox1.KeyDown += new System.Windows.Forms.KeyEventHandler(this.maskedTextBox1_KeyDown);