CellValidating細胞焦點錯誤

Question

我在我的表單中有2個Datagridview，我在使用細胞驗證和細胞驗證事件處理程序..在我的datagridview。如果我將光標放在單元格本身中，並嘗試通過菜單點擊打開一個新文件。我收到一條錯誤消息：「異常的參數未被用戶代碼處理，索引超出範圍。」

我知道，當光標在單元格中時，它得到了焦點，它在單元驗證過程中，這就是爲什麼我得到這個錯誤。

此行引發錯誤消息：「異常的參數未被用戶代碼處理，索引超出範圍。」 datagridview.Rows[e.RowIndex].ErrorText = "";

我該如何避免這個錯誤？或者如何在菜單點擊時刪除焦點以打開一個新文件？謝謝。

private void datagridview_CellValidating(object sender, CellValidatingEventArgs e) 
      { 
       if (e.ColumnInfo.Name == "Item1" || e.ColumnInfo.Name == "Item2") 
       { 
        datagridview.Rows[e.RowIndex].ErrorText = ""; 
        int newInteger; 
        if (datagridview.Rows[e.RowIndex].IsModified) 
         return; 
        if (!int.TryParse(e.Value.ToString(), 
         out newInteger) || newInteger < -50000 || newInteger > 50000) 
        { 
         e.Cancel = true; 
         datagridview.Rows[e.RowIndex].ErrorText = "The value must be a non-negative integer"; 
        } 
       } 

      } 

private void datagridview_CellValidated(object sender, CellValidatedEventArgs e) 
      { 

       if (e.ColumnIndex != 3) 
        return; 
       int nextRowIndex = e.RowIndex + 1; 
       int lastRowIndex = datagridview.Rows.Count - 1; 
       if (nextRowIndex <= lastRowIndex) 
       { 
        var value = datagridview.Rows[e.RowIndex].Cells[3].Value.ToString(); 
        datagridview.Rows[nextRowIndex].Cells[2].Value = value; 
       } 
      } 

菜單項的Clik打開新文件到DataGridView：

private void m_test1_Click_1(object sender, EventArgs e) 
    { 
     myconfig = Myconfig.DeserializeFromXmlFile(@"test2.xml"); 
     Display(rseConfig); 
     m_ConfigPages.Visible = true; 

    } 



private void m_test2_Click(object sender, EventArgs e) 
    { 
     myconfig = Myconfig.DeserializeFromXmlFile(@"test2.xml"); 
     Display(myconfig); 
     m_ConfigPages.Visible = true; 

    } 

我使用DataError事件Hnadler，但它不工作：

private void datagridview_DataError(object sender, DataGridViewDataErrorEventArgs e) 
     { 
      // Don't throw an exception when we're done. 
      e.ThrowException = false; 

      // Display an error message. 
      string txt = "Error with " + 
       datagridview.Columns[e.ColumnIndex].HeaderText + 
       "\n\n" + e.Exception.Message; 
      MessageBox.Show(txt, "Error", 
       MessageBoxButtons.OK, MessageBoxIcon.Error); 

      // If this is true, then the user is trapped in this cell. 
      e.Cancel = true; 
     } 

即使，我有行和col索引：datagridview.Rows[e.RowIndex].Cells[e.ColumnIndex].Value仍然無法正常工作。

Answer 1

嘗試添加該事件

dgv.DataError += new DataGridViewDataErrorEventHandler(dgv_DataError); 


void dgv_DataError(object sender, DataGridViewDataErrorEventArgs e) 
{ 
     //Show any message or not.. its upto you now 
} 

編輯：

修改您的cellvalidating事件作爲

private void datagridview_CellValidating(object sender, CellValidatingEventArgs e) 
{ 
    try 
    { 
    int temp = Convert.ToInt32(e.Value.ToString()) 
    if(temp < -5000 || temp > 5000)  
      datagridview.Rows[e.RowIndex].ErrorText = "The value must be bteewn 5000 and 5000"; 
    } 
    catch 
    { 
    datagridview.Rows[e.RowIndex].ErrorText = "The value must be integer and bteewn 5000 and 5000"; 
    } 
}