Question

我正在使用一个文本框和datagridview。其中我使用gridview单元格进行了计算（总金额），整个单元格的总量显示在文本框中。但它仅在编辑模式下显示。我想要总值也显示在表格加载时间。

private void datagrid_CellEndEdit(object sender, DataGridViewCellEventArgs e)
{
     double value1 = datagrid.Rows[e.RowIndex].Cells[2].Value == DBNull.Value ? 0 : Convert.ToDouble(datagrid.Rows[e.RowIndex].Cells[2].Value);
     double value2 = datagrid.Rows[e.RowIndex].Cells[3].Value == DBNull.Value ? 0 : Convert.ToDouble(datagrid.Rows[e.RowIndex].Cells[3].Value);
     double value3 = datagrid.Rows[e.RowIndex].Cells[4].Value == DBNull.Value ? 0 : Convert.ToDouble(datagrid.Rows[e.RowIndex].Cells[4].Value);
     double value4 = datagrid.Rows[e.RowIndex].Cells[5].Value == DBNull.Value ? 0 : Convert.ToDouble(datagrid.Rows[e.RowIndex].Cells[5].Value);
     datagrid.Rows[e.RowIndex].Cells[6].Value = ((value2 + (value3/100)) * value1) - (value4/100);

     if (e.ColumnIndex == 5)
     {
        summition();
     }
}
void summition()
{
     double sum = 0;
     foreach (DataGridViewRow row in datagrid.Rows)
     {
         if (!row.IsNewRow)
             sum += Convert.ToDouble(row.Cells[6].Value.ToString());
     }    
     texttotal.Text = sum.ToString();
}

Answer 1

您可以将代码移动到单独的函数(CalculateSum)中，并在加载Form并更改DataGridCell时调用此函数。

因此您需要另外调用Form_Load事件来调用(CalculateSum)函数。

订阅Form_Load事件如下：

this.Load += new System.EventHandler(this.Form1_Load);

完整代码

this.Load += new System.EventHandler(this.Form1_Load);
private void datagrid_CellEndEdit(object sender, DataGridViewCellEventArgs e)
{
    CalculateSum();
}

private void Form1_Load(object sender, EventArgs e)
{
    CalculateSum();
}
private void CalculateSum()
{
    double value1 = datagrid.Rows[e.RowIndex].Cells[2].Value == DBNull.Value ? 0 : Convert.ToDouble(datagrid.Rows[e.RowIndex].Cells[2].Value);
    double value2 = datagrid.Rows[e.RowIndex].Cells[3].Value == DBNull.Value ? 0 : Convert.ToDouble(datagrid.Rows[e.RowIndex].Cells[3].Value);
    double value3 = datagrid.Rows[e.RowIndex].Cells[4].Value == DBNull.Value ? 0 : Convert.ToDouble(datagrid.Rows[e.RowIndex].Cells[4].Value);
    double value4 = datagrid.Rows[e.RowIndex].Cells[5].Value == DBNull.Value ? 0 : Convert.ToDouble(datagrid.Rows[e.RowIndex].Cells[5].Value);
    datagrid.Rows[e.RowIndex].Cells[6].Value = ((value2 + (value3/100)) * value1) - (value4/100);

    if (e.ColumnIndex == 5)
    {
        summition();
    }
}

Answer 2

两种选择：

您可以从datagrid_CellEndEdit事件调用函数Form_Load。类似的东西：

this.Load += new System.EventHandler(this.Form1_Load);
MyForm_Load(object sender, EventArgs e)
{
    datagrid_CellEndEdit(null,null)
}

您可以创建另一个方法，该方法将从Form_Load事件和datagrid_CellEndEdit事件中调用。

例如：

this.Load += new System.EventHandler(this.Form1_Load);
private void datagrid_CellEndEdit(object sender, DataGridViewCellEventArgs e)
{
    Calculate();
}

private void Form1_Load(object sender, EventArgs e)
{
    Calculate();
}

private void Calculate()
{
    double value1 = datagrid.Rows[e.RowIndex].Cells[2].Value == DBNull.Value ? 0 : Convert.ToDouble(datagrid.Rows[e.RowIndex].Cells[2].Value);
    double value2 = datagrid.Rows[e.RowIndex].Cells[3].Value == DBNull.Value ? 0 : Convert.ToDouble(datagrid.Rows[e.RowIndex].Cells[3].Value);
    double value3 = datagrid.Rows[e.RowIndex].Cells[4].Value == DBNull.Value ? 0 : Convert.ToDouble(datagrid.Rows[e.RowIndex].Cells[4].Value);
    double value4 = datagrid.Rows[e.RowIndex].Cells[5].Value == DBNull.Value ? 0 : Convert.ToDouble(datagrid.Rows[e.RowIndex].Cells[5].Value);
    datagrid.Rows[e.RowIndex].Cells[6].Value = ((value2 + (value3/100)) * value1) - (value4/100);

    if (e.ColumnIndex == 5)
    {
        summition();
    }
}

如何在datagridview传递给textbox的表单加载事件的文本框中显示计算量

2 个答案: