Gridview_RowEditing empty values - vb.net

Question

I have a gridview control that i am manually binding the data in. When i edit a row and update it the values of the text boxes that are sent are always the Old Values. I've found a few threads on this but have not had any luck extracting the new values.
<asp:GridView ID="GridView1" runat="server">
<Columns>
<asp:CommandField ShowEditButton="True" />
</Columns>
</asp:GridView>
Private Sub GridView1_RowUpdating(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewUpdateEventArgs) Handles GridView1.RowUpdating
Dim gv As GridView = sender
For i As Integer = 0 To gv.Columns.Count Step 1
Dim cell As DataControlFieldCell = gv.Rows(e.RowIndex).Cells(i)
gv.Columns(0).ExtractValuesFromCell(e.NewValues, cell, DataControlRowState.Edit, True)
Next
For Each s As DictionaryEntry In e.NewValues
Debug.Print(s.Key & " | " & s.Value)
Next
ds.Tables("testTable").Rows(e.RowIndex).BeginEdit()
[ ... ]
ds.Tables("testTable").Rows(e.RowIndex).EndEdit()
GridView1.EditIndex = -1
BindData()
End Sub
I also want to point out that the ExtractValuesFromCell code is just my most recent attempt to get the New Data. Prior to that i was using something like this
Dim tb as TextBox = sender.Rows(e.RowIndex).Cells(1).Controls(0)
Label1.Text = tb.Text
Also here is how the data looks to start
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If (ds.Tables.Count = 0) Then
ds.Tables.Add("testTable")
ds.Tables("testTable").Columns.Add("Driver Name")
ds.Tables("testTable").Columns.Add("Total")
ds.Tables("testTable").Columns.Add("# Of Calls")
ds.Tables("testTable").Columns("Total").ReadOnly = True
ds.Tables("testTable").Columns("# Of Calls").ReadOnly = True
Dim newRow As DataRow = ds.Tables("testTable").NewRow()
newRow("Driver Name") = ""
newRow("Total") = ""
newRow("# Of Calls") = ""
ds.Tables("testTable").Rows.Add(newRow)
End If
BindData()
End Sub

Answer 1

You should DataBind your GridView only if Not Page.IsPostback, otherwise the new values are overwritten.
http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.gridview.rowupdating.aspx

Answer 2

public static void filedownload(string Path)
{
string str = "";
FileInfo file = new FileInfo(Path);
// Checking if file exists
if (file.Exists)
{
// Clear the content of the response
HttpContext.Current.Response.ClearContent();
// LINE1: Add the file name and attachment, which will force the open/cance/save dialog to show, to the header
HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment; filename=" + file.Name);
// Add the file size into the response header
HttpContext.Current.Response.AddHeader("Content-Length", file.Length.ToString());
// Set the ContentType
HttpContext.Current.Response.ContentType = CommonStrings.returnextension(file.Extension.ToLower());
// Write the file into the response (TransmitFile is for ASP.NET 2.0. In ASP.NET 1.1 you have to use WriteFile instead)
HttpContext.Current.Response.WriteFile(file.FullName);
// End the response
HttpContext.Current.Response.End();
}
else
{
// 9-vgrfu8i "File Not Found!";
}
// Response.Redirect(e.CommandArgument.ToString());
}
public static string GetBarCodeid(ListBox lbListBox)
{
string strCode = "";
if (lbListBox.Items.Count > 0)
{
for (int i = 0; i < lbListBox.Items.Count; i++)
{
if (lbListBox.Items[i].Selected == true)
{
if (strCode == "")
{
strCode = lbListBox.Items[i].Value.ToString();
}
else
{
strCode += "," + lbListBox.Items[i].Value.ToString();
}
}
}
}
return strCode;
}
public static string GetBarCodeName(ListBox lbListBox)
{
string strBarCodeName = "";
if (lbListBox.Items.Count > 0)
{
for (int i = 0; i < lbListBox.Items.Count; i++)
{
if (lbListBox.Items[i].Selected == true)
{
if (strBarCodeName == "")
{
strBarCodeName = lbListBox.Items[i].Text.ToString();
}
else
{
strBarCodeName += "," + lbListBox.Items[i].Text.ToString();
}
}
}
}
return strBarCodeName;
}
public static double GetBarCodeCount(ListBox lbListBox, double Count)
{
double intBarCodeCount = 0;
if (lbListBox.Items.Count > 0)
{
for (int i = 0; i < lbListBox.Items.Count; i++)
{
if (lbListBox.Items[i].Selected == true)
{
if (intBarCodeCount == 0)
{
intBarCodeCount = 1;
}
else
{
intBarCodeCount++;
}
}
}
}
return intBarCodeCount;
}
public static void SelectListBox(ListBox lbListBox, string strBarCodeId)
{
ExecuteProcedures ex = new ExecuteProcedures(1, MasterCommonStrings.ConnectionString);
ex.Parameters.Add("#vcrBarCodeid", SqlDbType.VarChar, 500, strBarCodeId);
DataTable dt = (DataTable)ex.LoadTableWithProcedure("Proc_Erp_Trn_Get_BarCode_Bata");
if (dt.Rows.Count > 0)
{
for (int i = 0; i < dt.Rows.Count; i++)
{
for (int j = 0; j < lbListBox.Items.Count; j++)
{
if (dt.Rows[i]["data"].ToString() == lbListBox.Items[j].Value.ToString())
{
lbListBox.Items[j].Selected = true;
break;
}
}
}
}
}
public static string GetgridBarCode(DataTable dt, string strColumnName)
{
string strBarCodeCount = "";
if (dt.Rows.Count > 0)
{
for (int i = 0; i < dt.Rows.Count; i++)
{
if (Convert.ToInt32(dt.Rows[i]["intStatus"]) != 2)
{
if (dt.Rows[i][strColumnName].ToString() != "")
if (strBarCodeCount == "")
{
strBarCodeCount = dt.Rows[i][strColumnName].ToString();
}
else
{
strBarCodeCount += dt.Rows[i][strColumnName].ToString();
}
}
}
}
return strBarCodeCount;
}
public static DataTable CheckBarCodeExistsOrNot(ListBox lbListbox, string strColumeName, string strReplacegridBarCodeid, DataView dvDescription)
{
DataTable dtDescription = new DataTable();
dtDescription = (DataTable)dvDescription.Table;
string strgridBarCode = CommonFunctions.GetgridBarCode(dtDescription, strColumeName);
string strSelectBarCode = CommonFunctions.GetBarCodeid(lbListbox);
ExecuteProcedures ex = new ExecuteProcedures(3, MasterCommonStrings.ConnectionString);
ex.Parameters.Add("#vcrgridBarcodeid", SqlDbType.VarChar, 500, strgridBarCode);
ex.Parameters.Add("#vcrSelectBarcodeid", SqlDbType.VarChar, 500, strSelectBarCode);
ex.Parameters.Add("#vcrReplaceBarCodeid", SqlDbType.VarChar, 500, strReplacegridBarCodeid);
DataTable dt = (DataTable)ex.LoadTableWithProcedure("Proc_Erp_Trn_Check_BarCode_Exists_Or_Not");
return dt;
}
public static int BarcodeUpdateIntoBarCodeDrec(string strBarCode_Description_Drec_id, SqlTransaction sqlTran, SqlConnection Con)
{
ExecuteProcedures ex = new ExecuteProcedures(1, MasterCommonStrings.ConnectionString);
ex.Parameters.Add("#intBarCode_Description_Drec_id", SqlDbType.VarChar, 8000, strBarCode_Description_Drec_id);
int i = Convert.ToInt32(ex.InvokeProcedure("Proc_Erp_Trn_Update_erp_mst_BarCode_Drec", sqlTran, ValueDataType.Number, Con));
if (i != 0)
{
return i;
}
else
{
return 0;
}
}
public static string AddBarcodeToListBox(TextBox txtScanBarcode, ListBox lbScanBarCode, ListBox lbSystemBarCode)
{
string barcodePresent = "";
if (txtScanBarcode.Text != "")
{
foreach (ListItem li in lbSystemBarCode.Items)
{
if (li.Text != txtScanBarcode.Text)
{
barcodePresent = "Not In Our System";
}
else
{
if (li.Selected == true)
{
barcodePresent = "Barcode Already Scan";
txtScanBarcode.Text = "";
txtScanBarcode.Focus();
break;
}
else
{
lbScanBarCode.Items.Add(txtScanBarcode.Text);
li.Selected = true;
txtScanBarcode.Text = "";
txtScanBarcode.Focus();
barcodePresent = "Barcode Scan Successfully";
break;
}
}
}
if (barcodePresent == "Not In Our System")
{
txtScanBarcode.Text = "";
txtScanBarcode.Focus();
}
}
else
{
barcodePresent = "Please Scan Barcode";
}
return barcodePresent;
}
public static void RemoveBarCodeFromListBox(ListBox lbScanBarCode, ListBox lbSystemBarCode)
{
if (lbScanBarCode.Items.Count > 0)
{
for (int i = 0; i < lbScanBarCode.Items.Count; i++)
{
if (lbScanBarCode.Items[i].Selected)
{
foreach (ListItem li1 in lbSystemBarCode.Items)
{
if (lbScanBarCode.Items[i].Text == li1.Text)
{
li1.Selected = false;
break;
}
}
lbScanBarCode.Items.Remove(lbScanBarCode.Items[i]);
}
}
}
}
public static void AddBarcodeToGridListBox(ListBox lbBarCode, ListBox lbGridScanBarCodeDisplay)
{
if (lbBarCode.Items.Count > 0)
{
for (int i = 0; i < lbBarCode.Items.Count; i++)
{
if (lbBarCode.Items[i].Selected == true)
{
lbGridScanBarCodeDisplay.Items.Add(lbBarCode.Items[i].Text);
}
}
}
}
public static void Alert(string strMessage, System.Web.UI.Page PAGE)
{
HttpContext Current = HttpContext.Current;
string strScript = "<script type=text/javascript>alert('" + strMessage + "')</script>";
if (!PAGE.IsStartupScriptRegistered("Alert"))
{
PAGE.RegisterStartupScript("Alert", strScript);
}
}
public static int DeletedTotalDrec(DataView dv, string strTableName, string strColumnName, string Value, SqlTransaction SqlTra, SqlConnection Con)
{
DataTable dtDrec = new DataTable();
dtDrec = (DataTable)dv.Table;
int i = 0;
if (dtDrec.Rows.Count > 0)
{
ExecuteProcedures one = new ExecuteProcedures(3, MasterCommonStrings.ConnectionString);
one.Parameters.Add("#TableName", SqlDbType.VarChar, 8000, strTableName);
one.Parameters.Add("#ColumnName", SqlDbType.VarChar, 8000, strColumnName);
one.Parameters.Add("#ColumnValue", SqlDbType.VarChar, 8000, Value);
int b = Convert.ToInt32(one.InvokeProcedure("Proc_Erp_Trn_Deleted_Transction_Total_Drec", SqlTra, ValueDataType.Number, Con));
for (int j = 0; j < dtDrec.Rows.Count; j++)
{
ExecuteProcedures EX = new ExecuteProcedures(19, MasterCommonStrings.ConnectionString);
EX.Parameters.Add("#TableName", SqlDbType.VarChar, 8000, strTableName);
EX.Parameters.Add("#FirstColumnName", SqlDbType.VarChar, 8000, dtDrec.Columns[0].ColumnName.ToString());
EX.Parameters.Add("#SecondColumnName", SqlDbType.VarChar, 8000, dtDrec.Columns[1].ColumnName.ToString());
EX.Parameters.Add("#ThiredColumnName", SqlDbType.VarChar, 8000, dtDrec.Columns[2].ColumnName.ToString());
EX.Parameters.Add("#FourColumnName", SqlDbType.VarChar, 8000, dtDrec.Columns[3].ColumnName.ToString());
EX.Parameters.Add("#FiveColumnName", SqlDbType.VarChar, 8000, dtDrec.Columns[4].ColumnName.ToString());
EX.Parameters.Add("#SixtColumnName", SqlDbType.VarChar, 8000, dtDrec.Columns[5].ColumnName.ToString());
EX.Parameters.Add("#SevenColumnName", SqlDbType.VarChar, 8000, dtDrec.Columns[6].ColumnName.ToString());
EX.Parameters.Add("#EightColumnName ", SqlDbType.VarChar, 8000, dtDrec.Columns[7].ColumnName.ToString());
EX.Parameters.Add("#NineColumnName", SqlDbType.VarChar, 8000, strColumnName);
EX.Parameters.Add("#FirstColumnNameValue ", SqlDbType.VarChar, 8000, dtDrec.Rows[j][0].ToString());
EX.Parameters.Add("#SecondColumnNameValue", SqlDbType.VarChar, 8000, dtDrec.Rows[j][1].ToString());
EX.Parameters.Add("#ThiredColumnNameValue", SqlDbType.VarChar, 8000, dtDrec.Rows[j][2].ToString());
EX.Parameters.Add("#FourColumnNameValue ", SqlDbType.VarChar, 8000, dtDrec.Rows[j][3].ToString());
EX.Parameters.Add("#FiveColumnNameValue", SqlDbType.VarChar, 8000, dtDrec.Rows[j][4].ToString());
EX.Parameters.Add("#SixtColumnNameValue", SqlDbType.VarChar, 8000, dtDrec.Rows[j][5].ToString());
EX.Parameters.Add("#SevenColumnNameValue", SqlDbType.VarChar, 8000, dtDrec.Rows[j][6].ToString());
EX.Parameters.Add("#EightColumnNameValue", SqlDbType.VarChar, 8000, dtDrec.Rows[j][7].ToString());
EX.Parameters.Add("#NineColumnNameValue ", SqlDbType.VarChar, 8000, Value);
i = Convert.ToInt32(EX.InvokeProcedure("proc_erp_Trn_Insert_into_Total_Drec", SqlTra, ValueDataType.Number, Con));
}
}
return i;
}
public static bool CheckRows(Manage_Drec Description)
{
if (Description.InTable.Rows.Count > 0)
{
return true;
}else
{
return false;
}
}
#endregion
# region "Procedures"
public static void SetRadiobutton(string strStatus, RadioButton Rbyes, RadioButton rbNo)
{
if (strStatus == "Yes")
{
Rbyes.Checked = true;
}
else
{
Rbyes.Checked = false;
}
if (strStatus == "No")
{
rbNo.Checked = true;
}
else
{
rbNo.Checked = false;
}
}
public static void Set_CheckBox(bool Status, CheckBox ChkName)
{
if (Status == true)
{
ChkName.Checked = true;
}
else
{
ChkName.Checked = false;
}
}
public static void DoSomeFileWritingStuff(string message)
{
//Debug.WriteLine("Writing to file...");
try
{
using (StreamWriter writer = new StreamWriter(LOG_FILE, true))
{
if (message == "")
{
writer.WriteLine("Cache Callback: {0}", DateTime.Now);
}
else
{
writer.WriteLine(message);
}
writer.Close();
}
AspSendEmail smail = new AspSendEmail();
//smail.strHost = mail.intrawebsolns.com
smail.SendEmail("support#intrawebsolns.com", "amit4692#gmail.com", "Exception Error", message, "Error ERP");
}
catch (Exception x)
{
//Debug.WriteLine(x);
DoSomeFileWritingStuff(x.Message);
}
//Debug.WriteLine("File write successful");
}
public static void SetRights(string Rights, Panel pnl)
{
foreach (Control ctrl in pnl.Controls)
{
if (ctrl.GetType().Name == "Button")
{
if ((((Button)ctrl).ID == "btnAdd" && Rights.IndexOf("A") > -1) || (((Button)ctrl).ID == "btnEdit" && Rights.IndexOf("E") > -1)
|| (((Button)ctrl).ID == "btnDelete" && Rights.IndexOf("D") > -1))
{
ctrl.Visible = true;
}
if ((((Button)ctrl).ID == "btnAdd" && Rights.IndexOf("S") > -1) || (((Button)ctrl).ID == "btnEdit" && Rights.IndexOf("S") > -1)
|| (((Button)ctrl).ID == "btnDelete" && Rights.IndexOf("S") > -1))
{
ctrl.Visible = true;
}
}
}
}
#endregion
public static void Enable_Btn_For_Add(Button btnAdd, Button btnCancel, Button btnDelete, Button btnEdit, Button btnUpdate, Button btnexit, Button btnfind)
{
btnEdit.Enabled = false;
btnAdd.Enabled = false;
btnfind.Enabled = false;
btnUpdate.Enabled = true;
btnCancel.Enabled = true;
btnDelete.Enabled = false;
btnexit.Enabled = true;
}
public static bool Check_Entry_exists(string tableName, string columnName, string columnValue)
{
bool result=false;
try
{
ExecuteProcedures ex = new ExecuteProcedures(4, AccountCommonStrings.ConnectionString);
ex.Parameters.Add("#tableName", SqlDbType.VarChar, 100, tableName);
ex.Parameters.Add("#columnName", SqlDbType.VarChar, 100, columnName);
ex.Parameters.Add("#columnValue", SqlDbType.VarChar, 100, #columnValue);
ex.Parameters.Add("#isbitdeleted", SqlDbType.Int, 0);
string temp =Convert.ToString( ex.InvokeProcedure("proc_check_Delete_entry", ValueDataType.String));
if (temp == "false")
{
result = false;
}
else
{
result = true;
}
}
catch (Exception)
{
}
return result;
}
public static bool Check_Entry_exists(string tableName, string columnName, string columnValue,string isbitdeleted)
{
bool result = false;
try
{
ExecuteProcedures ex = new ExecuteProcedures(4, AccountCommonStrings.ConnectionString);
ex.Parameters.Add("#tableName", SqlDbType.VarChar, 100, tableName);
ex.Parameters.Add("#columnName", SqlDbType.VarChar, 100, columnName);
ex.Parameters.Add("#columnValue", SqlDbType.VarChar, 100, #columnValue);
ex.Parameters.Add("#isbitdeleted", SqlDbType.Int, isbitdeleted);
string temp = Convert.ToString(ex.InvokeProcedure("proc_check_Delete_entry", ValueDataType.String));
if (temp == "false")
{
result = false;
}
else
{
result = true;
}
}
catch (Exception)
{
}
return result;
}
}