objectdatasource

问题 I'm using a FormView with an ObjectDataSource and binding using <%# Bind("WhateverProp") %> - and all of my nullable columns are coming back with default values of the type in them. It appears that the FormView object doesn't have a ConvertEmtpyStringToNull property like the other binding containers do. I've found articles suggesting that this was a bug in VS 2005 / .Net 2.0 - but don't see any saying what the resolution was. Does anyone have any suggestions as to how I can work around this

问题 I'm using a FormView with an ObjectDataSource and binding using <%# Bind("WhateverProp") %> - and all of my nullable columns are coming back with default values of the type in them. It appears that the FormView object doesn't have a ConvertEmtpyStringToNull property like the other binding containers do. I've found articles suggesting that this was a bug in VS 2005 / .Net 2.0 - but don't see any saying what the resolution was. Does anyone have any suggestions as to how I can work around this

问题 i tried every solution so far with this similar problem and i get this error everytime. Plz Help!! static method [DataObjectMethod(DataObjectMethodType.Update)] public static void updateCustomer(int CustomerID, string firstname, string lastname, string email, int AccountNum) { SqlConnection connection = new SqlConnection(getConnectionString()); connection.Open(); SqlCommand command = new SqlCommand("sp_updateCustomer", connection); command.CommandType = CommandType.StoredProcedure; command

问题 I am creating a GridView/DetailsView page. I have a grid that displays a bunch of rows, when a row is selected it uses a DetailsView to allow for Insert/Update. My question is what is the best way to link these? I do not want to reach out to the web service again, all the data i need is in the selected grid view row. I basically have 2 separate data sources that share the same "DataObjectTypeName", the first data source retrieves the data, and the other to do the CRUD. What is the best way to

问题 I want to use an ObjectDataSource with a GridView in ASP.NET. Displaying the data in the GridView works. Now I add a CommandField to the GridView to also enable editing the data. The Update Method works fine, but I have Problems with deleting and inserting: When I click the Delete link in the GridView, the configured DeleteMethod is called, but with the wrong testSystemEndpoint parameter. Instead of the business object that should be deleted, it is a bare instance with all fields being 'null'

问题 I want to use an ObjectDataSource with a GridView in ASP.NET. Displaying the data in the GridView works. Now I add a CommandField to the GridView to also enable editing the data. The Update Method works fine, but I have Problems with deleting and inserting: When I click the Delete link in the GridView, the configured DeleteMethod is called, but with the wrong testSystemEndpoint parameter. Instead of the business object that should be deleted, it is a bare instance with all fields being 'null'

问题 I want to use an ObjectDataSource with a GridView in ASP.NET. Displaying the data in the GridView works. Now I add a CommandField to the GridView to also enable editing the data. The Update Method works fine, but I have Problems with deleting and inserting: When I click the Delete link in the GridView, the configured DeleteMethod is called, but with the wrong testSystemEndpoint parameter. Instead of the business object that should be deleted, it is a bare instance with all fields being 'null'

问题 If I have an ObjectDataSource defined at design time, can I get a DataTable from that ObjectDataSource at runtime? I have a method that returns a DataTable that I am using for the Select method property of the ObjectDataSource. 回答1: I don't really understand your question... are you asking if the object you define in the ObjectDataSource can return a DataTable in the configured select method? Yes, I do it all the time. You can also examine the returned DataTable in the OnSelected event (it is

问题 If I have an ObjectDataSource defined at design time, can I get a DataTable from that ObjectDataSource at runtime? I have a method that returns a DataTable that I am using for the Select method property of the ObjectDataSource. 回答1: I don't really understand your question... are you asking if the object you define in the ObjectDataSource can return a DataTable in the configured select method? Yes, I do it all the time. You can also examine the returned DataTable in the OnSelected event (it is

问题 This is a general how does DataBind work questions... I have a simple page with a GridView that is bound (in the aspx code) to an ObjectDataSource. I can look in the Select() function called by the ObjectDataSource to see that it is called on the initial load and on every post back. I have some logic that happens on post backs that will affect the GridView's data, and I want to call GridView.DataBind() later on in the post back, after I've made some changes. Is there a way to prevent the