Question

I have a GridView,
without using SelectedIndexChanged, how can I retrieve the value of each row from GridView when click on each button in each row?

this is my aspx code

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="ProductID"
        DataSourceID="SqlDataSource1" ShowHeader="False" AllowPaging="True" BorderColor="White"
        CellPadding="6" GridLines="None" Height="100px" Width="800px">
        <Columns>
            <asp:TemplateField>
                <ItemTemplate>
                    Card Name:
                    <asp:Label ID="Label1" runat="server" Text='<%# Bind("Name") %>'></asp:Label>
                    <br />
                    Cost :
                    <asp:Label ID="Label2" runat="server" Text='<%# Bind("Price") %>'></asp:Label>
                    <br />
                    <asp:Label ID="Label3" runat="server" Text='<%# Bind("ProductImgID") %>'></asp:Label>
                    <asp:Image ID="Image3" runat="server" ImageUrl='<%# Eval("ProductImgUrl", "images/{0}") %>' />
                    <br />
                    <asp:Button ID="btnAddProduct" runat="server" Text="Add" />
                    <br />
                </ItemTemplate>
            </asp:TemplateField>
        </Columns>
    </asp:GridView>

Answer 1

One option can be to Bind the CommandArgument of the button to the ProductID

<asp:Button ID="btnAddProduct" runat="server" Text="Add" CommandArgument='<%#Bind("ProductID")%>' />

and then in the RowCommand event retrieve the ProductID and extract the row from database

string prodID=(string)e.CommandArgument()

then using the ID retrieve the row from database.