我应该为此使用什么Datagrid事件

本文关键字:什么 Datagrid 事件 我应该 | 更新日期: 2023-09-27 18:30:08

所以我有一个从数据源调用的数据网格视图。

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

这是它的代码:

        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,每当我更改数量行中的一个单元格时,数量单元格就会从该列对应的位置更改。

我是活动的初学者,所以当涉及到这类事情时,我真的需要帮助。提前感谢!

我应该为此使用什么Datagrid事件

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

上面的代码很简单,假设软件没有被滥用,下一个代码更可靠:

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;
}
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