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A datakey represents the primary key field or field of a record that can uniquely identify it in a data-bound control. Row Index represents the index of the particular row.Many a times in our applications we use primary keys to get control of the particular record in the gridview. The following diagram depicts the sorting workflow, including the Grid View's assignment of its properties.Keep in mind that the entire process is kicked off by the user clicking a Link Button in one of the sortable column's headers, and completes by displaying the data in the requested sorted order.
While the Data Grid (and Grid View) offer built-in sorting support, there is no visual feedback as to what column the data is sorted by.In Part 18 of the An Extensive Examination of the Data Grid Web Control article series, I showed how to dynamically update a sortable Data Grid's header columns so that an up or down arrow image would appear next to the sorted column name depending on whether the column was sorted ascendingly or descendingly (view a live demo).This was accomplished by programmatically looping through the Data Grid's I recently needed to implement this functionality in a Grid View control. NET page, like I did with the Data Grid demo, I decided to instead create a custom Web server control that extended the Grid View control, adding the necessary functionality. If the Grid View is bound to a data source control that supports sorting, the Grid View will internally re-bind to the data source using the new sort order.The code is shown below, the example assumes that the grid shows 'Person' records referring to a 'Job' table: Hi, How about if you want to purely just display a foreign Key value in a column? So rather than display say, Category ID (=4), you might want to display the actual category itself (e.g.