Does Ado.net check if the following update is required? ADDRESS table with a TOWN column, for example. Retrieve a ADDRESS row that has a TOWN value of "Leeds" In update code ADDRESS.TOWN gets set to "Leeds" , i.e. Its not actually changed. We have called Set methods or assignments so RowState gets changed to modified. Does the ada...
Does a typed dataset use reflection on runtime? ...
This is my first question on StackOverflow.com and I'm not sure if this is the correct way to do this. I found a similar question titled: Modifying the Data Source for the Strongly Typed Dataset Connection String. However, the answer provided is not working for me. I'm not able to comment on it because I don't have enough "reputation poi...
(VS2008) I'm trying to configure a TableAdapter in a Typed DataSet to return only a certain subset of columns from the main schema of the table on which it is based, but it always returns the entire schema (all columns) with blank values in the columns I have omitted. The TableAdpater has the default Fill and GetData() methods that come...
I created a typed data set in one project, and moved it to another. The orginal connectionstring it created in the settings file was something like "myconnectionstring2". When I moved it to the new project I went into the project settings file and created a connection string called "myconnectionstring". I'm trying to get the typed datase...
I have seen many references stating that TableAdapters are weak and silly, and that any real dev would use DataAdapters. I don't know if that is true or not, but I am exploring the matter, and stressing out over how bad this whole 'DataAdapter/TableAdapter against a Typed DataSets' smells. Let me try to explain... Suppose I have my Typ...
When I built my .xsd, I had to choose the columns for each table, and it made a schema for the tables, right? So how can I get that Select string to use as a base Select command for new instances of dataadapters, and then just append a Where and OrderBy clause to it as needed? That would keep me from having to keep each DataAdapter's ...
I would like to use a strongly typed dataset with textboxes on a web form. How can i do this? Cheers Mick ...
I have a Windows Forms application with a DataGridView in one of the forms. The DataGridView can insert and update through a Typed Data Set generated by Visual Studio. I want to show user friendly error messages when a user doesnt fill in a required field or enters the wrong data type, etc. instead of the ugly huge one that is shown by ...
Hi, I have designed a dataset using VS2008 dataset designer. In one of the datatables, I have set "AllowDBNull" property of most of the columns to be False. However, still if I create a DataRow containing null values for these columns, this datatable accepts this row, without any error. Am I not understanding something here? Please adv...
We use calculated columns in a few SQL Server 2005 tables which always return data of a specific type (bit, varchar(50), etc...). These tables are consumed by a .NET data layer using strongly-typed datasets and tableadapters, however since the calculated columns are not constrained to a specific type (we always return a specific type, b...
I need to create a strongly typed dataset during run-time for the user preferred target database. Visual studio has massive design time support for creating typed datasets. I need to automate the process of generating typed datasets for the target database at runtime. It should create... 1.) XSD file. 2.) Typed dataset represnting the...
How much effort would it take to migrate a large existing codebase from a Strongly Typed Dataset driven data access layer to a DAL driven by stored procs and/or a more modern ORM package? Is there any shiny tool that automates a portion of this process? The current code base has well over 100+ datasets mirroring the sql database (but ha...
I have a table in SQL server: Categories -------------- CategoryID (uniqueidentifier) ParentCategoryID (uniqueidentifier) allow nulls ParentCategoryID is meant to hold a value in CategoryID to indicate which category is the parent. If it has no parent (i.e. it's a top category) then ParentCategoryID should be null. I'm using strong...
Ever since .net 2.0 release this question has been discussed over a large number of times. Many of the developers are not in favour of Typed datasets and there are few who use them practically. The goal of the question is to identify the reasons why one should use or not use Typed datasets in their applications. In my case, I personall...
I'm working with .NET strongly-typed datasets and have a table with a nullable int column (and a nullable DateTime column as well). Apparently there is a bug with the dataset designer that prevents having nullable columns on these data types. The designer only allows "throw exception" as the default behavior for null values. Unfortuna...
I have this query as a stored procedure: SELECT ID FROM dbo.tblRentalUnit WHERE (NOT EXISTS (SELECT 1 AS Expr1 FROM dbo.tblTenant WHERE (dbo.tblRentalUnit.ID = UnitID))) In Microsoft SQL Server Management Studio Express, it executes in 16 ms. When I have it in a typed d...
My application contains several forms which consist of a strongly typed datagridview, a strongly typed bindingsource, and a strongly typed table adapter. I am using some code in each form to update the database whenever the user leaves the current row, shifts focus away from the datagrid or the form, or closes the form. This code is th...
I am attempting add a tableadapter to a stored procedure in my SQL Server 2005 Express. The stored procedure, however, uses a temporary table called #temp. When creating the table adapter, Visual Studio complains "Unknown Object '#temp'" and says that the stored procedure returns 0 columns. This is problematic because I use that stored p...
I am trying to create an instance of a typed dataset dynamically in my code at runtime. I have the type available to me, but when I try to do this: object obj = Activator.CreateInstance(Type.GetType("TYPED DATASET TYPE HERE")); The problem is the type doesn't seem to be valid according to the code when I try and run it. What could I b...