c＃error：输入字符串格式不正确 [英] c# error: Input string not in correct format

问题描述

我有一个datagrid视图是可编辑的。我得到一个单元格的值，然后计算另一个单元格的值。为此，我已经处理了CellEndEdit和CellBeginEdit事件。

  quantity = 0，quantity1 = 0，quantity_wt1 = 0，quantity_wt = 0 ，ekundag = 0; 
 private void grdCaret_CellEndEdit（object sender，DataGridViewCellEventArgs e）
 {
 try 
 {
 string value = grdCaret.Rows [e.RowIndex] .Cells [e.ColumnIndex ] .Value.ToString（）; 
 if（e.ColumnIndex == 1）
 {
 int val = int.Parse（value）; 
 quantity = val; 
 ekundag = ekundag + quantity; 
 tbTotDag_cr.Text = ekundag.ToString（）; 
} 
 
 if（e.ColumnIndex == 2）
 {
 float val = float.Parse（value）; 
 total = val; 
 ekunrakam = ekunrakam + total; 
 tbTotPrice_cr.Text = ekunrakam.ToString（）; 
} 
 grdCaret.Columns [3] .ReadOnly = false; 
} 
 catch（Exception ex）
 {
 MessageBox.Show（ex.Message.ToString（））; 
} 
} 
 
 private void grdCaret_CellBeginEdit（object sender，DataGridViewCellCancelEventArgs e）
 {
 rate = 0; 
 quantity1 = quantity; 
 total1 = total; 
 rate =（total1 / quantity1）; 
 if（e.ColumnIndex == 3）
 {
 grdCaret.Rows [e.RowIndex] .Cells [e.ColumnIndex] .Value = rate.ToString（）; 
 grdCaret.Rows [e.RowIndex] .Cells [e.ColumnIndex] .ReadOnly = true; 
 // quantity = 0; 
 // total = 0; 
} 
} 
  

在网格中，我列有数量，总数和率。我在这里收到以上错误：

  if（e.ColumnIndex == 1）
 {
 int val = int.Parse（value）; 
 quantity = val; 
 ekundag = ekundag + quantity; 
 tbTotDag_cr.Text = ekundag.ToString（）; 
} 
  

输入数量并点击gridview中的总列。请帮助我解决这个问题。

解决方案

AFAIK的int.Parse（）函数可能会导致这种异常。

您是否尝试检查单元格中的值？是不是可能，一些其他的字符在单元格，不仅数字？例如白色空间。

I have a datagrid view which is editable. I'm getting the value of a cell and then calculate the value of another cell. To do this I have handled CellEndEdit and CellBeginEdit events.

quantity = 0, quantity1 = 0, quantity_wt1 = 0, quantity_wt = 0, ekundag = 0;
private void grdCaret_CellEndEdit(object sender, DataGridViewCellEventArgs e)
{
    try
    {
        string value = grdCaret.Rows[e.RowIndex].Cells[e.ColumnIndex].Value.ToString();
        if (e.ColumnIndex == 1)
        {
            int val = int.Parse(value);
            quantity = val;
            ekundag = ekundag + quantity;
            tbTotDag_cr.Text = ekundag.ToString();
        }

        if (e.ColumnIndex == 2)
        {
            float val = float.Parse(value);
            total = val;
            ekunrakam = ekunrakam + total;
            tbTotPrice_cr.Text = ekunrakam.ToString();
        }
        grdCaret.Columns[3].ReadOnly = false;
    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.Message.ToString());
    }
}

private void grdCaret_CellBeginEdit(object sender, DataGridViewCellCancelEventArgs e)
{
    rate = 0;
    quantity1 = quantity;
    total1 = total;
    rate = (total1 / quantity1);
    if (e.ColumnIndex == 3)
    {
        grdCaret.Rows[e.RowIndex].Cells[e.ColumnIndex].Value = rate.ToString();
        grdCaret.Rows[e.RowIndex].Cells[e.ColumnIndex].ReadOnly = true;
        //  quantity = 0;
        //   total = 0;
    }
}

In the grid I have columns as quantity, total and rate. I get the above error here:

if (e.ColumnIndex == 1)
{
    int val = int.Parse(value);
    quantity = val;
    ekundag = ekundag + quantity;
    tbTotDag_cr.Text = ekundag.ToString();
}

When I enter quantity and click on the total column in gridview. Please help me fix this

解决方案

AFAIK the int.Parse() function can possibly cause this kind of exceptions.

Have you tried to check the value in the cell? Isn't it possible, that some other characters are in the cell, not only the numbers? White spaces for example.

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