Concept Of Datakeyname In Grid View?

May 16, 2010

i wanna know the concept of datakey name in grid view how its work...

when we connect it to the sqldatasource when i updata the field

i write the following code:

<asp:SqlDataSource ID="datasource1" ProviderName="System.Data.SqlClient" runat="server" ConnectionString="<%$ConnectionStrings:ConnectionS tring%>" SelectCommand="Select * From ManageClient"
UpdateCommand="Update ManageClient Set ClientName=@ClientName,Address=@Address,MobileNo=@ MobileNo,Image=@Image Where ClientId=@ClientId"></asp:SqlDataSource>

in the above code we donot use <updateparameter> tag can u explain why

when i connect it to the grid view & i keep the datakeynames="ClientId"

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