Question

所以我有一个datagridview，我从数据源调用。

http://i58.tinypic.com/dwvxxv.png

以下是代码：

        string strsql = "select a.Denomination, a.Value, b.Quantity, b.Amount from [Masterfile].[Denomination] a "+
        "left join [GEARS-POS].[POS].[CashCount] b "+
        "on A.Sequence = B.Sequence order by a.sequence";
        dataGridViewEx1.AutoGenerateColumns = false;
        DataTable dtgt = Library.Lib.GetData(strsql, Common.Common.ConnectionString());
        dataGridViewEx1.DataSource = dtgt.DefaultView;

        dataGridViewEx1.Columns[0].DataPropertyName = "Denomination";
        dataGridViewEx1.Columns[1].DataPropertyName = "Value";
        dataGridViewEx1.Columns[2].DataPropertyName = "Quantity";

我想要的是每次从数量行更改一个单元格，然后Amount单元格将从列对应的位置更改。

我是这个事件的初学者，所以在谈到这类事情时我真的需要帮助。提前谢谢！

Answer 1

使用CellEndEdit事件：

private void dataGridView1_CellEndEdit(object sender, DataGridViewCellEventArgs e)
{

   if(e.ColumnIndex == 2) // quantity column
   {
     int col = e.ColumnIndex;
     int row = e.RowIndex;
     int quantity = Convert.ToInt32(dataGridView1.Rows[row].Cells[col].Value); // entered quantity
     double value = Convert.ToDouble(dataGridView1.Rows[row].Cells[col -1].Value); // value of corresponding row

     dataGridView1.Rows[row].Cells[col+1].Value = (quantity*value).ToString();
   }
}

进一步关注

上面的代码非常简单，假设没有误用软件，下一个代码更加稳固：

private void dataGridView1_CellEndEdit(object sender, DataGridViewCellEventArgs e)
{
   if(dataGridView1[e.ColumnIndex, e.RowIndex] == null) return;
   // rest of code as in the upper one
}

private void dataGridView1_CellValidating(object sender, DataGridViewCellEventArgs e)
{
   int col = e.ColumnIndex;
   int row = e.RowIndex;
   string data = e.FormattedValue.ToString();

   if(!checkData(data))
   {
     e.Cancel = false;
     return;
   }

   // for example I want to limit the quantities to be between [0, 100]

   if(col == 2)
   {
     int iData = Convert.ToInt32(data);
     if(iData < 0 || iDat > 100)
     {
       e.Cancel = true;
       return;
     }
   }


}


private bool chackData(string d)
{
   if (d.Length <= 0 || d.Length >= 10) return false;

   foreach (char c in d)
   {
     if('0' >= c || c >= '9')
     {
        return false;
     }
   }
   return true;
}

我应该使用什么Datagrid事件？

1 个答案: