How do you tell ASP .Net dynamic data to use stored procedures for select?

问题

I see you can specify Insert, Update and Delete stored procs, but no straightforward way for SELECT stored procs.

回答1:

This is doable but not via the visual drag / drop tool. You have to do three things:

Create a new method from the datacontext class that will be called to "get" your data

public partial class DatabaseDataContext {
[Function(Name = "dbo.Contact_Get")]
[ResultType(typeof(Contact))]
[ResultType(typeof(int))]
public IMultipleResults GetContacts([Parameter(Name = "PageIndex", DbType = "Int")] System.Nullable<int> pageIndex, [Parameter(Name = "PageSize", DbType = "Int")] System.Nullable<int> pageSize, [Parameter(Name = "Sort", DbType = "NVarChar(10)")] string sort, [Parameter(Name = "ContactTypeId", DbType = "Int")] System.Nullable<int> contactTypeId) {
    IExecuteResult result = this.ExecuteMethodCall(this, ((MethodInfo)(MethodInfo.GetCurrentMethod())), pageIndex, pageSize, sort, contactTypeId);
    return ((IMultipleResults)(result.ReturnValue));
}

}

Create a new page template (List.aspx for example) for the particular table you want in the CustomPages folder to control the selecting from.

Control the gridview's selecting mechanism.

protected void GridDataSource_Selecting(object sender, LinqDataSourceSelectEventArgs e) {
DatabaseDataContext db = new DatabaseDataContext();
IMultipleResults results = db.GetContacts(e.Arguments.StartRowIndex, e.Arguments.MaximumRows, e.Arguments.SortExpression, (int?)e.WhereParameters["ContactTypeId"]);
e.Result = results.GetResult<Contact>().ToList();
e.Arguments.TotalRowCount = results.GetResult<int>().Single<int>();

}

Check out the Dynamic Data SP sample on the codeplex site for DD that shows you how to do this:

http://aspnet.codeplex.com/Release/ProjectReleases.aspx?ReleaseId=14473

回答2:

What you're looking for I believe is not exactly possible, because entities must be mapped to a table or a view of some sort. A stored procedure is not something you can define an entity against.

However, it is certainly possible to create a mapping for a stored procedure that tells Linq2Sql to return entities when it's executed, and put a method in your DataContext class to run the sproc and get your list of entities. These entities perform the same as entities created from a regular table mapping, so calling SubmitChanges() on them would use any Insert/Update/Delete sprocs that you had created for that entity type.

Probably the best thing to do would be to look at this walkthrough by Scott Guthrie.

回答3:

linq-to-sql is a very bad idea...

but this sproc should allow you to do what you want

create PROCEDURE [dbo].[usp_GetCompanies] (
    @in_filter nvarchar(2000)
)
AS
    declare @sql nvarchar(max)
    begin
        set @sql = '
        SELECT 
            c.id as company_id, c.name as company_name
        FROM company c
        WHERE id is not null ' + @in_filter + ' order by c.type, c.name ' 
        exec sp_executesql @sql
    end
return

sample

来源：https://stackoverflow.com/questions/1059863/how-do-you-tell-asp-net-dynamic-data-to-use-stored-procedures-for-select

标签

ASP.NET

stored-procedures

select

dynamic-data