WinForm中DataGridView验证单元格输入的是数字

事件：DataGridView验证单元格输入的是数字，DataGridView源数据是从数据库读取的。

需求：当用户输入的不是数字的时候需要提示信息（数据是直接绑定数据库的，因此dataGridView有自己的报错功能，我们需要屏蔽掉它，显示自己的错误提示！）

实现：选择DataGridView的CellValidating事件

(1) 验证整数：

View Code

 1  private void gridPlant_CellValidating(object sender, DataGridViewCellValidatingEventArgs e)
 2         {
 3             if (e.RowIndex > -1 && e.ColumnIndex > -1)
 4             {
 5                 DataGridView grid = (DataGridView)sender;
 6                 grid.Rows[e.RowIndex].ErrorText = "";
 7                //这里最好用列名，而不是列索引号做判断
 8                 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")
 9                 {
10 
11                     Int32 newInteger = 0;
12                     if (!int.TryParse(e.FormattedValue.ToString(), out newInteger))
13                     {
14                         e.Cancel = true;
15                         grid.Rows[e.RowIndex].ErrorText = "Please enter a int number!";
16                         MessageBox.Show("the value is not nubmer , Pleaser enter a int number !");
17                         return;
18                     }
19                 }
20             }
21         }

(2) 验证十进制数：

View Code

 1  private void gridBriefsOlder_CellValidating(object sender, DataGridViewCellValidatingEventArgs e)
 2         {
 3             if (e.RowIndex > -1 && e.ColumnIndex > -1)
 4             {
 5                 DataGridView grid = (DataGridView)sender;
 6                 grid.Rows[e.RowIndex].ErrorText = "";
 7 
 8                 if (grid.Columns[e.ColumnIndex].Name == "WO0009_APPROXIMATE_COMPLETION_PERCENTAGE1")
 9                 {
10                     try
11                     {
12                         Convert.ToDecimal(e.FormattedValue);
13                     }
14                     catch
15                     {
16                         e.Cancel = true;
17                         grid.Rows[e.RowIndex].ErrorText = "Please enter a number!";
18                         MessageBox.Show("the value is not nubmer , Pleaser enter a  number !");
19                         return;
20                     }
21                 }
22             }
23         }