The connection to the underlying data source is not yet open when the event handler delegate is called.Therefore, you cannot directly cancel the Update database operation by calling the Cancel method on the Db Command object that is exposed by the Sql Data Source Command Event Args object.If you click the automatically generated Insert button of the Details View control, the Details View shows a different user interface, which is used to insert a new record.
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After a record is successfully updated, the Updated event is handled by an event handler to perform a post-processing step where an e-mail message notification is sent.
event to perform additional initialization operations that are specific to your application, to validate the values of parameters, or to change the parameter values before the Sql Data Source control performs the update operation.
event handler deserializes the object in view state that contains the original data for the data record that is being updated.
The object that contains the original data is passed as a parameter to the Update method.
The parameters are available as an IDictionary collection that is accessed by the The following three examples show a Web page, a code-behind page class, and a data-access class that enable a user to retrieve and update records in the Employees table in the Northwind database.
The first example shows a Web page that contains two Object Data Source controls, a Drop Down List control, and a Details View control.
Also, inserting new rows with 0 on the decimal field doesn't seem to have a problem. Try dumping that value into a temporary variable within Price Group Gv_Row Updating.
Then insert a breakpoint, and check what that variable gets.
I also changed the type to Float in the db and Double in the model, but what finally got it working was having the nullable property.
If anybody else has a better solution I'll welcome any other answers.
The first Object Data Source control and the Drop Down List control are used to retrieve and display employee names from the database.