Get Id from GridView using Button - asp.net

Question

I have a Grid Where I have Id like this:
<div class="row ">
<asp:GridView ID="gvIndex" CssClass="table table-bordered table-responsive" runat="server" AllowPaging="True" PageSize="10" AutoGenerateColumns="False" AutoGenerateEditButton="False" OnRowCommand="gvIndex_RowCommand">
<Columns>
<asp:BoundField DataField="Id" HeaderText="Número" HtmlEncode="false"> //This is my Id Field
<FooterStyle Width="200px" />
</asp:BoundField>
<asp:BoundField DataField="Nombre" HeaderText="Nombre" HtmlEncode="false">
<FooterStyle Width="400px" />
</asp:BoundField>
<asp:BoundField DataField="Direccion" HeaderText="Dirección" HtmlEncode="false">
<FooterStyle Width="400px" />
</asp:BoundField>
<asp:BoundField DataField="Puesto" HeaderText="Puesto" HtmlEncode="false">
<FooterStyle Width="400px" />
</asp:BoundField>
<asp:BoundField DataField="Fecha" HeaderText="Fecha" HtmlEncode="false">
<FooterStyle Width="175px" />
</asp:BoundField>
<asp:BoundField DataField="CorreoElectronico" HeaderText="Correro Electrónico" HtmlEncode="false">
<FooterStyle Width="350px" />
</asp:BoundField>
<asp:TemplateField ItemStyle-HorizontalAlign="Center" HeaderText="Edición">
<ItemTemplate>
<asp:LinkButton ID="EditarIngreso" OnClick="EditarIngreso_Click" CommandArgument="<% Eval('Id') %>" CommandName="SelectRow" CssClass="btn btn-primary" runat="server">Editar</asp:LinkButton> //There I want to get value of Id
<%--<asp:HyperLink ID="EditarIngreso" BorderStyle="None" OnClick="EditarIngreso_Click" Text="Editar" runat="server">HyperLink</asp:HyperLink>--%>
<%--<a id="EditarIngreso" runat="server" style="text-decoration: underline; border: none">Editar</a>--%>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</div>
As you can see, I want to get value of Id in this line:
<asp:LinkButton ID="EditarIngreso" OnClick="EditarIngreso_Click" CommandArgument="<% Eval('Id') %>" CommandName="SelectRow" CssClass="btn btn-primary" runat="server">Editar</asp:LinkButton>
But I don't know what is wrong with this, I try to get it with this method:
protected void gvIndex_RowCommand(object sender, GridViewCommandEventArgs e)
{
MyID.Value = e.CommandArgument.ToString();
}
But I just receiving "<%Eval('Id') %>" instead my Id into MyID.Value
Any Help is very appreciate. Regards

Answer 1

You use it like this:
<asp:LinkButton ID="LinkButton1" CommandArgument='<%# Eval("Id") %>' runat="server" Text="Button" CommandName="SelectRow" />
And it looks you are using a regular button OnClick also, you need to remove that and use the CommandName in gvIndex_RowCommand
protected void gvIndex_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "SelectRow")
{
MyID.Value = e.CommandArgument.ToString();
}
}

Answer 2

First missing #
<asp:LinkButton ID="EditarIngreso" OnClick="EditarIngreso_Click" CommandArgument="<%# Eval('Id') %>" CommandName="SelectRow" CssClass="btn btn-primary" runat="server">Editar</asp:LinkButton>
In Gridview Tag
add DataKeyNames= "Id"
<asp:Gridview id="gvIndex" DataKeyNames= "Id" />
Then OnClick of LinkButton
protected void EditarIngreso_Click(object sender,EventArgs e)
{
LinkButton btn = sender as LinkButton ;
GridViewRow row = btn.NamingContainer as GridViewRow;
string pk = gvIndex.DataKeys[row.RowIndex].Values[0].ToString();
// here PK is your ID
// Convert it to Int32
}