I set up a database mirroring and then used this connectionstring to connect to it: Data Source={0};Failover Partner={1};Initial Catalog=AdventureWorks; Integrated Security=True; After adding some data into database, I shutdown the principal server, so the mirror server becomes the principal server. I open the connection again...
I have a DataGridView bound to a bindingsource which is bound to a List<T>. The user clicks a row that goes to a form with textboxes etc. The textboxes are databound like so: if (txtID.DataBindings.Count == 0) txtID.DataBindings.Add("Text", bindingSource, "Title"); I want to be able to detect if the user has modified...
The Goal Use an ADO.NET IDbConnection and IDbCommand to execute multiple commands at the same time, against the same database, given that the ADO.NET implementation is specified at runtime. Investigation The MSDN Documentation for IDbConnection does not specify any threading limitations. The SqlConnection page has the standard disclai...
what code should i write in web.config for the connection string for DB connectivity woth ado.net component?? ...
Is possible to use ADO .Net from an Win32 Application build with Delphi 7. maybe using CrossTalk or Hydra? Any recommendation is welcome. thanks in advance. ...
In a datalist, you usually extract row data with a FindControl on a control that is assigned a value via a databind using say, Eval. What if in your datalist, there is no bind to an ASP.NET server control? It's in a datalist, "straight up", in say a table cell or on its own. You can't do a FindControl, so is it possible to extract a r...
A while back I asked a question about TransactionScope escalating to MSDTC when I wasn't expecting it to. (Previous question) What it boiled down to was, in SQL2005, in order to use a TransactionScope, you can only instance and open a single SqlConnection within the life of the TransactionScope. With SQL2008, you can instance multiple ...
Hi, I have a csv file that I import into a DataTable. Furthermore I've created a TableAdapter with several queries. Is it somehow possible to execute the queries associated with the TableAdapter directly on the "in-memory" DataTable (doesn't seem so) or do I always have to write the imported DataTable to the database first and then exec...
Suppose that I have an ASP.NET page. In the page load event handler, I open a database connection and do some processing. But after the processing is done, I don't close the connection explicitly by calling the CLOSE method of the connection object. Now when the page processing at the server side is finished, the GC will dispose all the...
I am having a little trouble with an 'IndexOutOfRangeException'. I think it is because when the code tries to get the DateModified col from the database it sometimes contains NULLS (the users haven't always updated the page since they created it). Here is my code; s = ("select datemodified, maintainedby, email, hitcount from updates wh...
Hi guys: Many articles recommend adopting "SET NOCOUNT ON" to avoid receiving message like "1 Row(s) affected". I'm curious what ADO.NET API I can use to get message when SET NOCOUNT OFF. Thanks. ...
Possible Duplicate: Repository pattern tutorial in C# anybody knows where can I find an example of Repository Implementation using just ADO.NET without any 3rd party components like Nhibernate ...
In a large project relying on SQL Server stored procedures and classic ADO.NET (DataSets, DataAdapters) after INSERT, DELETE and UPDATE procedures there is a SELECT following. In code, all the methods return void, is this SELECT of any relevance - what effect does in have? What is the performance impact of the SELECT? ...
I know that nowadays there is a lot of ready-to-go stuff that you can use, but if you want full control over db requests/queries, and best performance I think that this is the way to go. Also because ADO.NET does the connection pooling automatically for SqlConnection, how do you think ? ...
Hi, I have a database which consists of the following: ** Table 1 ** Id (PK) Field1 ** Table 2 ** Id (PK) Field2 ** Link Table ** Table1Id (FK) Table2Id (FK) The problem is, I cannot access Table 2 from Table 1, even though the relationship exists in the database. For example, the following should be possible: var Results...
I am using Microsoft.Jet.OLEDB.4.0 from .NET to read a CSV file. Here is a sample input data row: 102A Avenue,97 Street,99 Street,2 Lanes Closed,2007-04-13,2009-12-31 When I read the last two valuee they come out as DateTime rather than strings and that is neither what I want nor what I expect. It seems that the provider performs type...
Is there any way to set the default database of an ODBC DSN, using the ODBC connection string in an OdbcConnection? Edit: If I already have a DSN setup and a normal connection works. OdbcConnection connection = new OdbcConnection("DSN=TestDSN;UID=ADMIN;PWD=****;"); Is there a way I can change the default connection that is set ...
i took this code from msdn string connString = "Data Source=localhost;Integrated Security=SSPI;Initial Catalog=Northwind;"; using (SqlConnection conn = new SqlConnection(connString)) { SqlCommand cmd = conn.CreateCommand(); cmd.CommandText = "SELECT CustomerId, CompanyName FROM Customers"; conn.Open(); ...
I have this code to transfer records from one-table to the other cmd2.CommandText = "select * from " + TableName; reader = cmd2.ExecuteReader(); if (reader != null) { String s = "".PadLeft(reader.FieldCount - 1, 'X').Replace("X", "?,") + "?"; ...
I have to leave in a DataTable only records with dates currently not present in the database. So I read all existing dates using the stored procedure (is it correct?): SELECT DISTINCT CAST(S.[date] AS DATE) -- original date is DATETIME2(0) FROM ... WHERE ... and load it to a DataTable: var tableDate = new DataTable(); new SqlDataAda...