Updating datagrid in asp net

Posted by / 22-Oct-2015 15:35

Updating datagrid in asp net

Under "Columns", expand the "Available Column" "Button Column". Message; } // check for invalid page index Reset Page Index(Data Grid1,view); Data Grid1. You can retrieve the selected row's primary key by calling: This works only if you have declared the primary key field in the Data Grid by setting the "Data Key Field" to "au_id". The following is taken from Jeff Prosise's article Wicked Code in MSDN Magazine (August, 2002). Alternating Item) { Web Control button = (Web Control) e.

You will see a "Delete" button that can be added to the "Selected Columns". protected void Data Grid1_Delete(Object sender, Data Grid Command Event Args e) { string key = Data Grid1. Once you have the primary key of the selected row in the Data Grid, you can find the corresponding row in the Data Set by calling: // Reset Page Index resets invalid page index to last page // ASSERT grid and view NOT NULL protected void Reset Page Index(Data Grid grid, Data View view) { // check for invalid page index if ((grid. Note the interesting cast to the base class Web Control, not to a Link Button.

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protected void Data Grid1_Item Created(Object sender, Data Grid Item Event Args e) { if (e.

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Deleting a row is fairly straightforward except for paging errors. Unfortunately, there appears to be a bug in the post back event model when in the Edit mode. Update(data Set11); } catch (Exception exc) { sql Data Adapter1.

If the user cancels the Message Box, the post back should not be executed.

Page Size); } } } As a final step, add client side Java Script support, popping up a Message Box to confirm a deletion.

This cast should work even if you change the column type to a Button.

// this method FAILS in edit mode due to post back bug which calls // the delete event handler in edit mode even on cancel!

If you look at the file Web Form1in the HTML view you will see where the On Delete Command property is set to "Data Grid_Delete". Update(data Set11); } catch (Exception exc) { sql Data Adapter1. Count)) { // invalid so leave at last page if ((view. This was done using the Property Builder: " On Update Command="Data Grid1_Update" On Cancel Command="Data Grid1_Cancel" On Edit Command="Data Grid1_Edit" On Delete Command="Data Grid1_Delete" Border Color="Blue" On Item Command="Item_Click" Allow Sorting="True" On Sort Command="Data Grid1_Sort" Allow Paging="True" On Item Created= "Data Grid1_Item Created" On Page Index Changed="Data Grid1_Page" Back Color="#C0FFFF" You can now dynamically add client side Java Script code to the first column in the Data Grid.

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The Data Grid will use this property to register the delete event handler: " Height="270px" Width="679px" On Update Command="Data Grid1_Update" On Cancel Command="Data Grid1_Cancel" On Edit Command="Data Grid1_Edit" On Delete Command="Data Grid1_Delete" Border Color="Blue" On Item Command="Item_Click" Allow Sorting="True" On Sort Command="Data Grid1_Sort" Allow Paging="True" On Page Index Changed="Data Grid1_Page" Back Color="#C0FFFF" Using the Design view, you can add a "Delete" button to the Data Grid by right clicking on the Data Grid and choosing the property builder. To String(); string debug= "No errors."; // Updates the dataset table try { Data Row dr= data Set11.authors. Fill(data Set11); //if Update fails, refresh dataset debug= exc. Text= debug; } Since the data in the Data Grid may not be synchronized with the data in the Data Set, you must find the proper row in the Data Set using the primary key of the selected row. This is done in your Data Grid1_Item Created event handler.

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