How To Declare Type Varchar In Markup For SQLDataSource?

How do you set the type to varChar like this using markup (xml tags in the .aspx page)?

If I were creating a SQLDataSource control declaratively and one of the parameters needed to be set to VarChar rather than just a string I would set a parameter type to varchar using this syntax:  myAdapter.UpdateCommand.Paramters.Add("@Title", SqlDbType.VarChar, 80, "Title");

SQLDataSource control as a default will create parameters as strings even though the table it is pointing to has type varchar  in it such as below:


<
asp
:
Parameter

Name
="Title"
Type
="String"
/>


If I leave it like that, I get the following error below (as expected) since it really needs to be type
SqlDbType.VarChar

"The data types text and nvarchar are incompatible in the equal to operator"


Below is example default markup the SqlDataSource control creates with an update.  Where in this markup should I change things so it will update correctly to varchar rather than just trying to throw a string in the table?


<
asp
:
SqlDataSource

ID
="IISLearning_Content_SqlDataSource"

runat
="server"

ConnectionString
="
<%$ ConnectionStrings:IISLearningConnectionString %>
"


SelectCommand
=""></
asp
:
SqlDataSource
>


<
asp
:
SqlDataSource

ID
="MySqlDataSource"

runat
="server"

ConflictDetection
="CompareAllValues"


ConnectionString
="<%$ ConnectionStrings:MyConnectionString %>"
OldValuesParameterFormatString
="original_{0}"
SelectCommand
="SELECT * FROM [MyTable]"


UpdateCommand
="UPDATE [MyTable] SET [Title] = @Title  WHERE [ID] = @original_ID AND [Title] = @original_Title">

<
UpdateParameters
>


<
asp
:
Parameter

Name
="Title"
Type
="String" />


<
asp
:
Parameter

Name
="original_ID"
Type
="Int32" />


<
asp
:
Parameter

Name
="original_Title"
Type
="String" />


</
UpdateParameters
>

</
asp
:
SqlDataSource
>