Get value of hidden field in GridView

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Hi,

I have a hidden field in a gridview.

C#

<blockquote class="FQ"><div class="FQA">Quote:</div><asp:GridView ID="gridView" runat="server" CellPadding="5" GridLines="None" 
                  AllowPaging="false" AllowSorting="True" AutoGenerateColumns="false"
                OnRowEditing="OnRowEditing" OnRowDataBound="OnRowDataBound"  
                  CausesValidation="true" CssClass="gridview" BorderColor="AntiqueWhite" 
                  BorderWidth="0px" CellSpacing="1">
                <SelectedRowStyle CssClass="gridview-selected-row" />
                <HeaderStyle CssClass="gridview-header" Font-Bold="false" />
                <AlternatingRowStyle CssClass="gridview-alternate-row" />
                <RowStyle CssClass="gridview-row" />
            
                <Columns>
                                
                    <asp:TemplateField HeaderText="CustomerId" Visible="false">
                        <EditItemTemplate>
                            <asp:TextBox ID="TextBox1" runat="server" Text='<%# 
Bind("cust_id") %>'></asp:TextBox>
                        </EditItemTemplate>
                        <ItemTemplate>
                            <asp:Label ID="Label1" runat="server" Text='<%# 
Bind("cust_id") %>'></asp:Label>
                        </ItemTemplate>
                    </asp:TemplateField>
                   <asp:TemplateField HeaderText="CustomerName" Visible="false">
                       <%--  <EditItemTemplate>
                            <asp:TextBox ID="TextBox2" runat="server" Text='<%# 
Bind("cust_name") %>'></asp:TextBox>
                        </EditItemTemplate>--%>
                        <ItemTemplate>
                            <asp:Label ID="Label2" runat="server" Text='<%# 
Bind("cust_name") %>'></asp:Label>
                        </ItemTemplate>
                    </asp:TemplateField>
                    <asp:TemplateField HeaderText="Display Name">
                        <EditItemTemplate>
                            <asp:TextBox ID="TextBox3" runat="server" Text='<%# Bind("cust_display_name") %>'></asp:TextBox>
                            <asp:RequiredFieldValidator ID="RequiredField2" runat="server" ControlToValidate="TextBox3" ErrorMessage ="Enter Display name" Display="Dynamic" ForeColor="Red" />
                        </EditItemTemplate>
                        <ItemTemplate>
                            <asp:Label ID="Label3" runat="server" Text='<%# 
Bind("cust_display_name") %>'></asp:Label>
                        </ItemTemplate>
                    </asp:TemplateField>
                   
                   
                    <asp:TemplateField HeaderText="Email">
                        <EditItemTemplate>
                            <asp:TextBox ID="TextBox4" runat="server" Text='<%# Bind("cust_email") %>'></asp:TextBox>
                            <asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" ControlToValidate="TextBox4" Display="Dynamic" ValidationExpression = "^[a-z0-9_\+-]+(\.[a-z0-9_\+-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*\.([a-z]{2,4})$" ErrorMessage="Invalid Email Id" ForeColor="Red"/>
                            <asp:RequiredFieldValidator ID="RequiredField1" runat="server" ControlToValidate="TextBox4" ErrorMessage ="Enter Email ID" Display="Dynamic" ForeColor="Red" />
                        </EditItemTemplate>
                        <ItemTemplate>
                            <asp:Label ID="Label4" runat="server" Text='<%# 
Bind("cust_email") %>'></asp:Label>
                        </ItemTemplate>
                    </asp:TemplateField>
                     <asp:TemplateField HeaderText="Services Id" Visible="false">
                      <%--  <EditItemTemplate>
                            <asp:TextBox ID="TextBox7" runat="server" Text='<%# 
Bind("service_id") %>'></asp:TextBox>
                        </EditItemTemplate>--%>
                        <ItemTemplate>
                            <asp:Label ID="Label7" runat="server" Text='<%# 
Bind("service_id") %>'></asp:Label>
                        </ItemTemplate>
                    </asp:TemplateField>
                    <asp:TemplateField HeaderText="Services">
                    <InsertItemTemplate>
                    <asp:Label ID="Label4" runat="server" Text='<%# 
Bind("service_display_name") %>'></asp:Label>
                    </InsertItemTemplate>
                   <%--     <EditItemTemplate>
                            <asp:TextBox ID="TextBox8" runat="server" Text='<%# 
Bind("service_display_name") %>'></asp:TextBox>--
                        </EditItemTemplate>--%>
                        <ItemTemplate>
                            <asp:Label ID="Label8" runat="server" Text='<%# 
Bind("service_display_name") %>'></asp:Label>
                        </ItemTemplate>
                    </asp:TemplateField>
                     <asp:TemplateField HeaderText="Status">
                     <InsertItemTemplate>
                    <asp:Label ID="LabelCustStatus" runat="server" Text='<%# 
Bind("cust_status") %>'></asp:Label>
                    </InsertItemTemplate>
                        <ItemTemplate>
                            <asp:Label ID="lbl_Cust_Status" runat="server" Text='<%# 
Bind("cust_status") %>'></asp:Label>
                        </ItemTemplate>
                    </asp:TemplateField>
                     <asp:TemplateField HeaderText="Spoc Name">
                   <InsertItemTemplate>
                    <asp:Label ID="LabelCustSpoc" runat="server" Text='<%# 
Bind("cust_spoc") %>'></asp:Label>
                    </InsertItemTemplate>
                        <ItemTemplate>
                            <asp:Label ID="lbl_cust_spoc" runat="server" Text='<%# 
Bind("cust_spoc") %>'></asp:Label>
                        </ItemTemplate>
                    </asp:TemplateField>
                     <asp:TemplateField HeaderText="Address">
                   <InsertItemTemplate>
                    <asp:Label ID="LabelCustAddress" runat="server" Text='<%# 
Bind("cust_address") %>'></asp:Label>
                    </InsertItemTemplate>
                        <ItemTemplate>
                            <asp:Label ID="lbl_cust_address" runat="server" Text='<%# 
Bind("cust_address") %>'></asp:Label>
                        </ItemTemplate>
                    </asp:TemplateField>

                    <asp:TemplateField HeaderText="Is Parent" Visible="false">
                  <%--      <EditItemTemplate>
                            <asp:TextBox ID="TextBox9" runat="server" Text='<%# 
Bind("is_parent") %>'></asp:TextBox>
                        </EditItemTemplate>--%>
                        <ItemTemplate>
                            <asp:Label ID="Label9" runat="server" Text='<%# 
Bind("is_parent") %>'></asp:Label>
                        </ItemTemplate>
                    </asp:TemplateField>

                     <asp:TemplateField HeaderText="Edit Services" >
                      <ItemTemplate>
                           <asp:LinkButton ID="lnkButtonAssignServ" runat="server" Autopostback="true" CauseValidation="true" OnClick="btnAssignServ_Click"
                            Text="Edit Services" 
                           ></asp:LinkButton>
                           </ItemTemplate>
                      </asp:TemplateField>

                   <asp:TemplateField>
                        <EditItemTemplate>
                           <asp:LinkButton ID ="lnkUpdate" ToolTip="Update" runat="server" OnClick="onUpdate" CssClass="update-link"></asp:LinkButton>
                           <asp:LinkButton ID ="LinkCancel" ToolTip="Cancel" runat="server" CssClass="cancel-link" CausesValidation="false" OnClick="onCancel"></asp:LinkButton>
                        </EditItemTemplate>
                        <ItemTemplate>
                           <asp:LinkButton ID="LinkDelete" ToolTip="Delete" runat="server" CauseValidation="false" Autopostback="true" OnClick="onDelete"
                            OnClientClick="return confirm('Do you really want to delete it?')" CommandName="onDelete" CssClass="delete-link"></asp:LinkButton>
                           <asp:LinkButton ID="lnkButtonEdit" runat="server" CauseValidation="false"
                           CommandName="Edit" CssClass="edit-link" ToolTip="Edit"></asp:LinkButton>                            
                        </ItemTemplate>
                    </asp:TemplateField>
                    
                </Columns>
            </asp:GridView>

When I tried to access Session['cust_id'] it in my code, it is showing me an error saying null value.

C#

protected void btnAssignServ_Click(object sender, EventArgs e)
        {
            GridViewRow row = (sender as LinkButton).NamingContainer as GridViewRow;
            gridView.SelectedIndex = row.RowIndex;
            TextBox cust_id = (TextBox)(gridView.Rows[gridView.SelectedIndex].FindControl("TextBox1"));
            Session["custid"] = cust_id.Text;
            Label displayName = (Label)(gridView.Rows[gridView.SelectedIndex].FindControl("Label2"));
            Session["Display_Name"] = displayName.Text;
            Label lblcustSpoc = (Label)(gridView.Rows[gridView.SelectedIndex].FindControl("lbl_cust_spoc"));
            Session["cust_spoc"] = lblcustSpoc.Text;
            Response.Redirect("AssignServToCustomer.aspx");
           
        }

Please help.

Posted 8-Oct-13 19:58pm

srmohanr

Updated 28-Jan-22 20:23pm

v2

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Comments

CodeBlack 9-Oct-13 2:04am

can you show me your whole aspx code for grid ? and where is your hiddent field in grid ? I cannot see it.

srmohanr 9-Oct-13 2:10am

HeaderText="CustomerId", this is the hidden field

CodeBlack 9-Oct-13 2:24am

<asp:TemplateField HeaderText="CustomerId" Visible="false">
<edititemtemplate>
<asp:TextBox ID="TextBox1" runat="server" Text='<%#
Bind("cust_id") %>'>

<itemtemplate>
<asp:Label ID="Label1" runat="server" Text='<%#
Bind("cust_id") %>'>

why do you keep this column visible='false' ? are you displaying that column again to visible ?

srmohanr 9-Oct-13 2:25am

This is an user page. I don't want to show the user ID to customer.

Thanks7872 9-Oct-13 2:43am

What do you mean by hidden field?

2 solutions

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This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

CodeBlack · Answer 1 · 2013-10-08T21:02:00

Do not bind column which needs to be kept hidden for user. Instead of that you can use hidden field and you can get value of the hidden field as shown in below sample :

ASPX Code:

XML

<asp:GridView ID="gridMain" runat="server" AutoGenerateColumns="False" >
    <Columns>
        <asp:TemplateField HeaderText="EmployeeName">
            <EditItemTemplate>
                <asp:TextBox ID="TextBox2" runat="server" Text='<%# Bind("EmployeeName") %>'></asp:TextBox>
            </EditItemTemplate>
            <ItemTemplate>
                <asp:Label ID="Label2" runat="server" Text='<%# Bind("EmployeeName") %>'></asp:Label>
                <input type="hidden" runat="server" id="hiddenEmployeeId" value='<%#Eval("EmployeeID") %>' />
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Edit Services">
            <ItemTemplate>
                <asp:LinkButton ID="lnkButtonAssignServ" runat="server" Autopostback="true" CauseValidation="true" OnClick="btnAssignServ_Click"
                    Text="Edit Services"></asp:LinkButton>
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>

Code Behind :

C#

protected void btnAssignServ_Click(object sender, EventArgs e)
        {
            GridViewRow row = (sender as LinkButton).NamingContainer as GridViewRow;
            gridMain.SelectedIndex = row.RowIndex;
            var customerId = gridMain.Rows[gridMain.SelectedIndex].FindControl("hiddenEmployeeId") as HtmlInputHidden;

            if (customerId != null)
            {
                Session["custid"] = customerId.Value;
            }
        }

M Imran Ansari · Answer 2 · 2022-01-28T20:23:00

You can also try the following to hide a field and get back into server side:

<ItemTemplate>
	<asp:HiddenField ID="HiddenField1" runat="server" Value='<%# Bind("cust_id") %>' />
	<asp:Label ID ="CustomerId" runat ="server" Text =''></asp:Label>
</ItemTemplate>

Server Side Code:
string strValue=((HiddenField)Gridivew1.SelectedRow.Cells[1].FindControl("HiddenField1")).Value;

Get value of hidden field in GridView

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Get value of hidden field in GridView

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