Question

I have a data grid that is bound to a generic collection. In the Page_Load event, I check for !this.IsPostback and call DataBind on the grid accordingly.

Then if I try to implement sorting by specifying the uniquename and sortexpression, it expects me to call DataBind even if the page is a postback.

How is this situation normally tackled? Calling unconditional DataBind in Page_Load does not seem like a good idea.

Answer 1

Call your databind code at the SortCommand Event:

void DataGrid1_SortCommand(Object sender, DataGridSortCommandEventArgs e)
    {
        // Retrieve the data source.
        DataTable dt = YOURDATA;

        // Create a DataView from the DataTable.
        DataView dv = new DataView(dt);

        // The DataView provides an easy way to sort. Simply set the
        // Sort property with the name of the field to sort by.
        dv.Sort = e.SortExpression;

        // Rebind the data source and specify that it should be sorted
        // by the field specified in the SortExpression property.
        DataGrid1.DataSource = dv;
        DataGrid1.DataBind();
    }