從gridview（文本框）得到的值

Question

protected void OnRowCommand(object server, GridViewCommandEventArgs e) 
    { 
     int rowindex = Convert.ToInt32(e.CommandArgument); 
     int fileid = Convert.ToInt32(((Label)gvAssignReviewer.Rows[rowindex].FindControl("lblFileId")‌​).Text); 
     System.Windows.Forms.MessageBox.Show(gvAssignRequest.Rows[rowindex].Cells[0].Tex‌​t); 
     String urevid = (((TextBox)gvAssignReviewer.Rows[rowindex].FindControl("txtReviewerId")).Text); 
     ur.UpdateReviewer(fileid, urevid); 
     Bind(); 
    } 

它給我的FileID，因爲它出現在DataGrid上，但在UrevID中，我沒有在文本框中獲取更新的值，因此我得到了空引用異常。請幫助我。

Answer 1

protected void ASPxGridView1_CustomColumnDisplayText(object sender, 
ASPxGridViewColumnDisplayTextEventArgs e) 
{ 
    if (e.Column.FieldName == "Column1") 
    { 
     int a= Convert.ToInt32(e.Value).ToString(); 
    } 

    if (e.Column.FieldName == "Column2") 
    { 

     string b= e.Value.ToString(); 
    } 

Answer 2

您需要檢查Label或TextBox在GridviewRow被發現。我會這樣做：

protected void OnRowCommand(object server, GridViewCommandEventArgs e) 
{ 
    // Don't use Windows Message Box 
    int rowindex = Convert.ToInt32(e.CommandArgument); 
    var lblFileId = gvAssignReviewer.Rows[rowindex].FindControl("lblFileId") as Label; 
    var txtReviewerId = gvAssignReviewer.Rows[rowindex].FindControl("txtReviewerId") as TextBox; 

    if(lblFileId != null && txtReviewerId != null) 
    { 
     int fileId; 
     int urevId; 

     if(int.TryParse(lblFileId.Text, out fileId) && int.TryParse(txtReviewerId.Text, out urevId)) 
     { 
       ur.UpdateReviewer(fileId, urevId); 
     } 
    } 
    Bind(); 
}