Retive Gridview Data Row by row and store in variable

Question

Hi,

I am using GridView AutogenrateColumn=False .This is my  Gridview code 

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<asp:GridView ID="gridview1" runat="server" AutoGenerateColumns="false">

<Columns>

<asp:TemplateField HeaderText="Select">

<ItemTemplate>

<asp:CheckBox ID="Ischeck" runat="server" />

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField HeaderText="Id">

<ItemTemplate>

<asp:Label ID="id" runat="server" Text='<%#Eval("Id") %>'></asp:Label>

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField HeaderText="Product Name">

<ItemTemplate>

<asp:Label ID="lblPrductName" runat="server" Text='<%#Eval("ProductName") %>'></asp:Label>

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField HeaderText="Description">

<ItemTemplate>

<asp:Label ID="lblObjName" runat="server" Text='<%#Eval("ObjName") %>'></asp:Label>

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField HeaderText="Quantity">

<ItemTemplate>

<asp:Label ID="lblQuantity" runat="server" Text='<%#Eval("Quantity") %>'></asp:Label>

</ItemTemplate>

</asp:TemplateField>

</Columns>

</asp:GridView>

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Now i am  retrive   data of grid view row by row.,So this is my code,In this code i am retriveing data in two ways but i am not able retive data.Plzz help me

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protected void btn_Click(object sender, EventArgs e)

{

foreach (GridViewRow item in gridview1.Rows)

{

string name = item.Cells[2].Text.ToString();  // 1st way

var nn =(Label) item.FindControl("ProductName"); //2nd Way

}

}