Visual Studio Express provides a free development tool that makes ASP.
Sometimes I can remove the mailbox and re-add it and it starts working but not always.
When the Sql Data Source control s method is invoked either programmatically or automatically from a data Web control a connection to the database is established, the parameter values are assigned to the query, and the command is shuttled off to the database.
NET Web Forms lets you build dynamic websites using a familiar drag-and-drop, event-driven model.A design surface and hundreds of controls and components let you rapidly build sophisticated, powerful UI-driven sites with data access.Fortunately, the Configure Data Source wizard provides an option to have the statements checkbox will only be checkable if the table selected has a primary key and the primary key column (or columns) are included in the list of returned columns.The Use optimistic concurrency checkbox, which becomes selectable once the Generate statements to provide optimistic concurrency control.Figure 2: Select the Delete Query Property from the Properties Window provide a value for this parameter (leave its Parameter source at None ).
Once we add deleting support to the Grid View, the Grid View will automatically supply this parameter value, using the value of its property added, the Grid View s smart tag now contains the Enable Deleting option. As discussed in An Overview of Inserting, Updating, and Deleting, this causes the Grid View to add a Command Field with its .As we'll see in this tutorial, these statements can be created manually or can be automatically generated by the Sql Data Source s Configure Data Source wizard.Note Since we ve already discussed the inserting, editing, and deleting capabilities of the Grid View, Details View, and Form View controls, this tutorial will focus on configuring the Sql Data Source control to support these operations.From the Designer in Sql Data Source and then bring up the Properties window (from the View menu, choose Properties window, or simply hit F4).Select the Delete Query property, which will bring up a set of ellipses.For now, leave this checkbox unchecked; we'll examine optimistic concurrency with the Sql Data Source control in the next tutorial.