How can I delete from a GridView when DataSource is a DataTable?

My DataSource is a DataTable populated from file system data in Page_Load. There is no database. How can I remove rows from the DataTable and re开发者_StackOverflow社区bind? I thought this had to be done in the GridView_RowCommand "Delete" section...

if(e.CommandName == "Delete")
    ...

When I try to access the DataRow's within

//get the datatable
DataTable dt = this.gridCPCP.DataSource as DataTable;

// Delete the record 
foreach (DataRow dr in dt.Rows)
{
    ....

dt is null. How do I reference the DataTable when deleting records?

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e.CommandArgument should give you the index of the row which should be deleted. You could bind your datatable to the grid again without the deleted item.