row.Cells[4].Text returns nothing in GridView1_SelectedIndexChanged?

I have a GridView in my page :

<asp:GridView ID="GridView1" runat="server" AllowPaging="True" BackColor="White"
    AutoGenerateColumns="False" EmptyDataText="No data available." BorderColor="#DEDFDE"
    BorderStyle="None" BorderWidth="1px" CellPadding="4" Width="729px" ForeColor="Black"
    GridLines="Vertical" OnSelectedIndexChanged="GridView1_SelectedIndexChanged">
    <RowStyle BackColor="#F7F7DE" />
    <Columns>
        <asp:TemplateField HeaderText="TransactionKey" SortExpression="TransactionKey">
            <EditItemTemplate>
                <asp:TextBox ID="TextBoxGridViewTransactionKey" runat="server" Text='<%# Bind("TextBoxTransactionKey") %>'></asp:TextBox>
            </EditItemTemplate>
            <ItemTemplate>
                <asp:Label ID="LabelGridViewTransactionKey" runat="server" Text='<%# Bind("TextBoxTransactionKey") %>'></asp:Label>
            </ItemTemplate>
            <HeaderStyle Font-Size="14px" />
            <ItemStyle Font-Size="12px" />
        </asp:TemplateField>
        <asp:TemplateField HeaderText="TerminalID" SortExpression="TerminalID">
            <EditItemTemplate>
                <asp:TextBox ID="TextBoxGridViewTerminalID" runat="server" Text='<%# Bind("TextBoxTerminalID") %>'></asp:TextBox>
            </EditItemTemplate>
            <ItemTemplate>
                <asp:Label ID="LabelGridViewTerminalID" runat="server" Text='<%# Bind("TextBoxTerminalID") %>'></asp:Label>
            </ItemTemplate>
            <HeaderStyle Font-Size="14px" />
            <ItemStyle Font-Size="12px" />
        </asp:TemplateField>
        <asp:TemplateField HeaderText="MerchantID" SortExpression="MerchantID">
            <EditItemTemplate>
                <asp:TextBox ID="TextBoxGridViewMerchantID" runat="server" Text='<%# Bind("TextBoxMerchantID") %>'></asp:TextBox>
            </EditItemTemplate>
            <ItemTemplate>
                <asp:Label ID="LabelGridViewMerchantID" runat="server" Text='<%# Bind("TextBoxMerchantID") %>'></asp:Label>
            </ItemTemplate>
            <HeaderStyle Font-Size="14px" />
            <ItemStyle Font-Size="12px" />
        </asp:TemplateField>
        <asp:TemplateField HeaderText="شماره حساب" SortExpression="شماره حساب">
            <EditItemTemplate>
                <asp:TextBox ID="TextBoxGridViewBankAccount" runat="server" Text='<%# Bind("TextBoxBankAccount") %>'></asp:TextBox>
            </EditItemTemplate>
            <ItemTemplate>
                <asp:Label ID="LabelGridViewBankAccount" runat="server" Text='<%# Bind("TextBoxBankAccount") %>'></asp:Label>
            </ItemTemplate>
            <HeaderStyle Font-Size="14px" />
            <ItemStyle Font-Size="12px" />
        </asp:TemplateField>
        <asp:TemplateField HeaderText="نام بانک" SortExpression="نام بانک">
            <EditItemTemplate>
                <asp:TextBox ID="TextBoxGridViewBankName" runat="server" Text='<%# Bind("BankName") %>'></asp:TextBox>
            </EditItemTemplate>
            <ItemTemplate>
                <asp:Label ID="LabelGridViewBankName" runat="server" Text='<%# Bind("BankName") %>'></asp:Label>
            </ItemTemplate>
            <HeaderStyle Font-Size="14px" />
            <ItemStyle Font-Size="12px" />
        </asp:TemplateField>
        <asp:CommandField ShowSelectButton="True" >
        <ItemStyle Font-Size="12px" />
        </asp:CommandField>
    </Columns>
    <FooterStyle BackColor="#CCCC99" />
    <PagerStyle ForeColor="Black" HorizontalAlign="Right" BackColor="#F7F7DE" />
    <SelectedRowStyle BackColor="#CE5D5A" Font-Bold="True" ForeColor="White" />
    <HeaderStyle BackColor="#6B696B" Font-Bold="True" ForeColor="White" />
    <AlternatingRowStyle BackColor="White" />
</asp:GridView>

I set the DataSource with the follwing code :

protected void Page_Load(object sender, EventArgs e)
{
    try
    {
        LabelTitr.Text = "Add Banks";
        LabelResult.Text = "";
        if (Session["Username"] != null)
        {
            string permission = "";
            bool login = PublicMethods.CheckUsernamePass(Session["Username"].ToString(), Session["Password"].ToString(), out permission);
            if (!login)
            {
                permission = "";
                Response.Redirect("../Default.aspx");
                Session["Username"] = Session["Password"] = null;
                return;
            }
        }
        else
        {
            Response.Redirect("../Default.aspx");
            Session["Username"] = Session["Password"] = null;
            return;
        }

        if (!IsPostBack)
            BindDataToGridView1();
    }
    catch (Exception ex)
    {
        LabelResult.Text = ex.Message;
    }
}

void BindDataToGridView1()
{
    try
    {
        DataSet1 dataSet = new DataSet1();
        DataClasses2DataContext dbc2 = new DataClasses2DataContext();
        var Definitions = dbc2.Definitions;
        if (Definitions.Count() <= 0) return;
        foreach (var Definition in Definitions)
        {
            string bankName = dbc2.Banks.Where(c => c.BankID == Definition.BankID).First().BankName;
            string CheckBox = "<input name="CheckBoxSubmitChanges" type="checkbox" value=" + Definition.DefinitionID + " />";
            dataSet.DataTableBanks.Rows.Add(bankName, Definition.BankAccount, Definition.MerchantID, Definition.TerminalID, Definition.TerminalID);
            GridView1.DataSource = dataSet.DataTableBanks;
        }
        GridView1.DataBind();
    }
    catch (Exception ex)
    {
        LabelResult.Text = ex.Message;
    }
}

and this is GridView1_SelectedIndexChanged method :

protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
{
    GridViewRow row = GridView1.SelectedRow;
    string temp = row.Cells[4].Text;
    LabelResult.Text = temp;
}

But always temp string is empty !!!
What’s wrong with it ?
Thanks

Answers:

Thank you for visiting the Q&A section on Magenaut. Please note that all the answers may not help you solve the issue immediately. So please treat them as advisements. If you found the post helpful (or not), leave a comment & I’ll get back to you as soon as possible.

Method 1

If it’s a TemplateField, you have to use the FindControl(“control ID”) option, not the text fo the cell. I count cell 4 as being a templatefield…

Method 2

There is no Text as your data is stored in controls. You need to search for the control you want and pull the Text out of.

Eg:

protected void GridView1_SelectedIndexChanged(object sender, EventArgs e) 
{ 
    GridViewRow row = GridView1.SelectedRow; 
    string temp = row.Cells[4].FindControl('LabelGridViewBankName').Text; 
    LabelResult.Text = temp; 
}

Optionally you could could key off the DataKey property if you are using it and then use it to search your datasource for the value you want.

Method 3

//this will give you control over the textbox object
var field = (TextBox)(GridView1.Rows[e.RowIndex].FindControl("your_control_ID"));
//and here you can access the text
string temp = field.Text;

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0