在C#textBox中限制只能输入字母、数字、空格或逗号:
private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
e.Handled = true;
if ((e.KeyChar>='a'&&e.KeyChar<='z')||(e.KeyChar>='A'&&e.KeyChar<='Z')||(e.KeyChar >= '1' && e.KeyChar <= '9') || e.KeyChar == ' ' || e.KeyChar == ',')
{
e.Handled = false;
}
}
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