Hi,
The Dataset/TableAdapter, in Visual Studio 10, asp.net/VB built on Mysql DB, generate insert/update/delete methods that has parameters named AS @p1 @p2 ... NOT AS the table Fields' Names. This cause two problems 1- during code writing, the name of the poped up parameters is meaningless 2- the GridView built up on that table adapter gives runtime ERROR at delete/update process, the error means that the all parameters of the delete/update method are duplicated, once as p1 p2 .. and another once as the table fields' name in the same method call.
take a look at the following sample of delete method definition and error:
XSD:
<DeleteCommand>
<DbCommand CommandType="Text" ModifiedByUser="false">
<CommandText>DELETE FROM `gen_settings` WHERE ((`CompanyNo` = @p1))</CommandText>
<Parameters>
<Parameter AllowDbNull="false" AutogeneratedName="" DataSourceName="" DbType="Int32" Direction="Input" ParameterName="@p1" Precision="0" ProviderType="Int32" Scale="0" Size="0" SourceColumn="CompanyNo" SourceColumnNullMapping="false" SourceVersion="Original"
/>
</Parameters>
</DbCommand>
</DeleteCommand>
Error:
Inner Exception Type: System.InvalidOperationException
Inner Exception: ObjectDataSource 'ObjectDataSource2' could not find a non-generic method 'Delete' that has parameters: p1, original_CompanyNo.
Inner Source: System.Web
Note that the same code was used on another developing PC without error, But when I installed a new developing PC I got this problem with the same code, so that I think it is related to the versions or a bug or installation issue.
Thanks