While selecting a particular row in a gridview i want to retrieve those values to a textbox in the next aspx page.In my project i want to display all values in a gridview and after that if i selecting a particular employee i wanted his entire details to be displayed in corresponding textboxes in next aspx page.how can i able to do this.can anybody help me  to sort this problem.

Sure, here's an example.

PAGE 1 ASPX 

<asp:gridview id="GridView1" runat="server" autogeneratecolumns="False" datakeynames="ProductID"
	datasourceid="SqlDataSource1">
	<columns>
		<asp:boundfield datafield="ProductID" headertext="ProductID" readonly="True" sortexpression="ProductID" />
		<asp:boundfield datafield="Name" headertext="Name" sortexpression="Name" />
		<asp:hyperlinkfield datanavigateurlfields="ProductID" datanavigateurlformatstring="1120691B.aspx?ProductID={0}"
			text="View Product" />
	</columns>
</asp:gridview>
<asp:sqldatasource id="SqlDataSource1" runat="server" connectionstring="<%$ ConnectionStrings:AdventureWorksConnectionString %>"
	selectcommand="SELECT [ProductID], [Name] FROM [Production].[Product]">
</asp:sqldatasource>

PAGE 2 ASPX 

<asp:detailsview id="DetailsView1" runat="server" datasourceid="SqlDataSource1">
</asp:detailsview>
<asp:sqldatasource id="SqlDataSource1" runat="server" connectionstring="<%$ ConnectionStrings:AdventureWorksConnectionString %>"
	selectcommand="SELECT [ProductID], [Name] FROM [Production].[Product] WHERE ([ProductID] = @ProductID)">
	<selectparameters>
		<asp:querystringparameter name="ProductID" querystringfield="ProductID" type="Int32" />
	</selectparameters>
</asp:sqldatasource>