Asp. NET, the DataKeys Count property for the GridView control is 0__.net

In the Onrowcommand event of the GridView control, you want to get the row number to obtain the primary key ID number of the row data. But there's a asp.net. The DataKeys Count property for the GridView control is a problem with 0, it is very hard to find the reason, the reason is very simple. To solve this problem, you only need to set the datakeynames= "This primary key field name" in the GridView.

int rowId = Int.            Parse (E.commandargument.tostring ()); Line number
int id = Int. Parse (Classgridview.datakeys[rowid].     Value.tostring ()); Gets the value of the primary key of the row's data

The ASPX page is set as follows:

<asp:linkbutton id= "LinkButton1" runat= "Server" Commandname= "Checkview" commandargument= "<%#" ((GridViewRow) Container). RowIndex%> > View subcategories </asp:LinkButton>