C# (CSharp) StockTracking General.isNumber示例

示例#1

 private void txtProductSalesAmount_KeyPress(object sender, KeyPressEventArgs e)
 {
     e.Handled = General.isNumber(e);
 }

示例#2

 private void txtPrice_KeyPress(object sender, KeyPressEventArgs e)
 {
     e.Handled = General.isNumber(e);
 }