ASP.NET Repeater Control - Getting Hiddenfield value inside the repeater control

Question

I have a hiddenfield inside a repeater control and a button outside the repeater control. below is the asp.code that i have.

 <asp:Repeater ID="rptAccordian" runat="server" OnItemDataBound="rptAccordian_ItemDataBound"> <ItemTemplate> <div class="s_panel"> <h1> <a href="#" data-content="Tool tip"><%# Eval("Name") %></a> </h1> <div> <p> <small><span style="font-family: 'Segoe UI'; font-weight: bold;">Category Objective: </span><span style="font-family: 'Segoe UI'"><%# Eval("Objective") %></span></small> </p> <p> <small><span style="font-family: 'Segoe UI'; font-weight: bold;">Category Riskscore: </span> <code><%# Eval("Score") %><span>%</span></code></small> </p> <p> <code> <img src="Content/img/add.png" /><asp:LinkButton ID="Add" runat="server">Add Question</asp:LinkButton> </code> </p> <asp:HiddenField ID="hdnCategoryID" runat="server" Value='<%# Bind("CategoryID") %>' /> </div> </ItemTemplate> </asp:Repeater> <div id="modalpopup"> <asp:Button ID="btnInsertQuestion" runat="server" Text="Save" OnClick="btnInsertQuestion_Click" /> </div> 

My Backend code is as follows.

protected void btnInsertQuestion_Click(object sender, EventArgs e)
{
    HiddenField hf = (HiddenField)rptAccordian.FindControl("hdnCategoryID");
    catID = Convert.ToInt16(hf.Value);
    Response.Write("ID is") + catID;
}

There are 13 repeaters and each repeater will have different CategoryID for it. I have a Link Button called Add inside each repeater and when I press that button I will have a modal popup open and it will have a button. On clicking that button I need to display the appropriate CategoryID which belongs to that repeater control in which I clicked the ADD link button.

However, the hiddenfield hf is showing as null and I'm not able to get the value of the hiddenfield of that accordion.

Answer 1

You have to get the repeater item to access the hiddenfield:

protected void btnInsertQuestion_Click(object sender, EventArgs e)
        {  
            for (int i = 0; i < rptAccordian.Items.Count; i++)
            {
                var item = rptAccordian.Items[i];

                var hf = item.FindControl("hdnCategoryID") as HiddenField;
                var val = hf.Value;
            }
        }   

UPDATED

protected void Add_Click(object sender, EventArgs e)
        {
            var lb = sender as LinkButton;
            var par = lb.Parent.FindControl("hdnCategoryID");

        }

Answer 2

I have acheived my answer using jQuery. I found the control hdnCategoryID and its value using jQuery and i assigned that value to a new hidden field and retrieved that value to my click event.

Answer 3

You can get that without using hiddenfield. You need to declare Add LinkButton in repeater like this.

<asp:LinkButton ID="Add" runat="server" CommandArgument = '<%# Bind("CategoryID")'%> OnClick = "Add_Click">Add Question</asp:LinkButton>

You have written code for btnInsertQuestion button click, where as you requested to get CategoryID in Add button click, so I am assuming your requirement is correct, but you have typed something else.

To get CategoryId in Add button click , you need to write like this.

protected void Add_Click(object sender, EventArgs e)
{
    //Get the reference of the clicked button.
    LinkButton button = (sender as LinkButton );

    //Get the command argument
    string cat_id = button.CommandArgument;
    // Type cast to int if application and use it.
}