WinForm中DataGridView驗證單元格輸入的是數字

     事件：DataGridView驗證單元格輸入的是數字，DataGridView源數據是從數據庫讀取的。

     需求：當用戶輸入的不是數字的時候需要提示信息（數據是直接綁定數據庫的，因此dataGridView有自己的報錯功能，我們需要屏蔽掉它，顯示自己的錯誤提示！）

     實現： 選擇DataGridView的CellValidating事件

             

      (1)  驗證整數：

 private void gridPlant_CellValidating(object sender, DataGridViewCellValidatingEventArgs e)
        {
            if (e.RowIndex > -1 && e.ColumnIndex > -1)
            {
                DataGridView grid = (DataGridView)sender;
                grid.Rows[e.RowIndex].ErrorText = "";
               //這里最好用列名，而不是列索引號做判斷
                if (grid.Columns[e.ColumnIndex].Name == "WO0011_NUMBER_IDLE" || grid.Columns[e.ColumnIndex].Name == "WO0011_NUMBER_WORKING" || grid.Columns[e.ColumnIndex].Name == "WO0011_NUMBER_ON_SITE")
                {

                    Int32 newInteger = 0;
                    if (!int.TryParse(e.FormattedValue.ToString(), out newInteger))
                    {
                        e.Cancel = true;
                        grid.Rows[e.RowIndex].ErrorText = "Please enter a int number!";
                        MessageBox.Show("the value is not nubmer , Pleaser enter a int number !");
                        return;
                    }
                }
            }
        }

     (2) 驗證十進制數：

 

 private void gridBriefsOlder_CellValidating(object sender, DataGridViewCellValidatingEventArgs e)
        {
            if (e.RowIndex > -1 && e.ColumnIndex > -1)
            {
                DataGridView grid = (DataGridView)sender;
                grid.Rows[e.RowIndex].ErrorText = "";

                if (grid.Columns[e.ColumnIndex].Name == "WO0009_APPROXIMATE_COMPLETION_PERCENTAGE1")
                {
                    try
                    {
                        Convert.ToDecimal(e.FormattedValue);
                    }
                    catch
                    {
                        e.Cancel = true;
                        grid.Rows[e.RowIndex].ErrorText = "Please enter a number!";
                        MessageBox.Show("the value is not nubmer , Pleaser enter a  number !");
                        return;
                    }
                }
            }
        }