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Search found 1109 results on 45 pages for 'ado'.

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• SQLiteDataAdapter Update method returning 0

  - by Lirik

  I loaded 83 rows from my CSV file, but when I try to update the SQLite database I get 0 rows... I can't figure out what I'm doing wrong. The program outputs: Num rows loaded is 83 Num rows updated is 0 The source code is: public void InsertData(String csvFileName, String tableName) { String dir = Path.GetDirectoryName(csvFileName); …

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• How to select top n rows from a datatable/dataview in asp.net

  - by skamale

  How to select top n rows from a datatable/dataview in asp.net.currently I am using the following code by passing the table and number of rows to get the records but is there a better way. public DataTable SelectTopDataRow(DataTable dt, int count) { DataTable dtn = dt.Clone(); for (int i = 0; i < count; i++) { …

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• SqlParameter contructor compiler overload choice

  - by Ash

  When creating a SqlParameter (.NET3.5) or OdbcParameter I often use the SqlParameter(string parameterName, Object value) constructor overload to set the value in one statement. When I tried passing a literal 0 as the value paramter I was initially caught by the C# compiler choosing the (string, OdbcType) overload instead of (string,…

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• Association not imported in EF4 designer for non-primary key

  - by Rommel Manalo

  The relationship 'FK_EXTERNAL_ISMARKETI_MARKETIN' has columns that are not part of the key of the table on the primary side of the relationship. The relationship was excluded. USE [Instruments.UnitTest] GO ALTER TABLE [Instr].[ExternalIdentification] WITH CHECK ADD CONSTRAINT [FK_EXTERNAL_ISMARKETI_MARKETIN] FOREIGN…

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• Can a stateless WCF service benefit from built-in database connection pooling?

  - by vladimir

  I understand that a typical .NET application that accesses a(n SQL Server) database doesn't have to do anything in particular in order to benefit from the connection pooling. Even if an application repeatedly opens and closes database connections, they do get pooled by the framework (assuming that things such as credentials…

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• DataReader-DataSet Hybrid solution

  - by G33kKahuna

  My solution architects and I have exhausted both pure Dataset and Datareader solutions. Basically we have a Microsoft.NET 2.0 windows service application that pulls data based on a query and processes additional tasks per record; almost a poor mans workflow system. The recordsets are broader (in terms of the columns) and…

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• SQLCE qand C#; Populate a DataSet with ALL the Tables from a SQLCE DB

  - by Zion

  How would I Populate a DataSet with ALL the Tables from a SQLCE DB. Is this possible in ONE SQL select statement? I know that I can call seperate select statements with the names of the table I need data from but I need a generic solution that just dumps all the tables from the SQLCE DB into a Dataset. Thanks

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• DataView Vs DataTable.Select()

  - by Aseem Gautam

  Considering the code below: Dataview someView = new DataView(sometable) someView.RowFilter = someFilter; if(someView.count > 0) { …. } Quite a number of articles which say Datatable.Select() is better than using DataViews, but these are prior to VS2008. Solved: The Mystery of DataView's Poor Performance with…

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• NHibernate connection string configuration

  - by user177883

  I have a c# library project, that i configured using nhibernate, and I like people to be able to import this project and use the project. I have a connection string in hibernate config file and in app.config file of another project. it would be nice for anyone to be able to set the connection string into this…

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• How to delte multiple rows from datatable in VB.net 2008 ?

  - by KuldipMCA

  How to delete multiple rows from datatable in VB.net 2008 with out looping ?

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• Can I use a single DateTime field on the Entity Framework model side when the value is stored in a set of Int fields in the actual database?

  - by Ivan

  The actual table in the database has separate integer fields for storing year, month, day, hour and minute values (all in UTC) (seconds and milliseconds are irrelevant for my task and considered equal to zero). Needless to say it would be of great convenience to have just one field of DateTime type on the…

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• BindingSource.Filter Problem [C# 2.0 on vs2008]

  - by mr.gobbolino

  BindingSource.Filter property is doesn't work while i filter with the unicode characters. any soluctoion for that? or how to implement custom BindingSource to use correct filter property.

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• datalist itemdatabound event having issues changing item bg color on condition

  - by Jreeter

  Hey guys I'm trying to do something really simple.. I'm checking a data column in my datarow if it's 0 I want the item back color in the datalist to be green if its < 0 remain transparent... if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem) { …

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• ASP.Net Layered app - Share Entity Data Model amongst layers

  - by Chris Klepeis

  How can I share the auto-generated entity data model (generated object classes) amongst all layers of my C# web app whilst only granting query access in the data layer? This uses the typical 3 layer approach: data, business, presentation. My data layer returns an IEnumerable<T> to my business layer,…

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• Why is sql server giving a conversion error when submitting date.today to a datetime column?

  - by kpierce8

  I am getting a conversion error every time I try to submit a date value to sql server. The column in sql server is a datetime and in vb I'm using Date.today to pass to my parameterized query. I keep getting a sql exception Conversion failed when converting datetime from character string. Here's the code …

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• ObjectDataSource Insert and Update methods error

  - by Jack

  I m developing asp.net 3.5 project. When I want to Insert with DetailsView this error occured: Error : ObjectDataSource 'ObjectDataSource2' could not find a non-generic method 'AddCity' that has parameters: CITY_NAME. <asp:ObjectDataSource ID="ObjectDataSource2" runat="server"…

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• C# SQL Data Adapter System.Data.StrongTypingException

  - by René

  I get my data from SQL to Dataset with Fill. It's just one table with two columns (CategoryId (int) and CategoryName (varchar)). When I look at my dataset after fill method, CategoryId Columns seems to be correct. But in the CategoryName I have a *System.Data.StrongTypingExceptio*n.…

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• linq, selecting columns as IEnumerable<DataRow>

  - by joe

  how can i do in linq: IEnumerable<DataRow> query = from rec in dt.AsEnumerable() where rec.Field<decimal>("column2") == 1 && foo(rec.Field<decimal>("column1")) select new { column1 = rec.Field<decimal>("column1"),…

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• Can Entity Framework be used for the purpose of entity/schema definition at application runtime?

  - by Kabeer

  Hello. Can 'Entity Framework' be used for the purpose of entity definition at application runtime? Ok, to make it simple, here is what I want to achieve: My application is a product. I should be able to define entities at runtime on the basis of inputs gathered from an 'authoring'…

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• .NET - Is there a way to programmatically fill all tables in a strongly-typed dataset?

  - by Mike Loux

  Hello, all! I have a SQL Server database for which I have created a strongly-typed DataSet (using the DataSet Designer in Visual Studio 2008), so all the adapters and select commands and whatnot were created for me by the wizard. It's a small database with largely static data, so…

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• ASP.NET SqlDataReader throwing error: Invalid attempt to call Read when reader is closed.

  - by Bugget

  This one has me stumped. Here are the relative bits of code: public AgencyDetails(Guid AgencyId) { try { evgStoredProcedure Procedure = new evgStoredProcedure(); Hashtable commandParameters = new Hashtable(); …

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• Difference between entity data model and linq to SQL

  - by Xulfee

  Difference between entity data model and linq to SQL. and which one is preferable

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• Importing an Excel WorkSheet into a Datatable

  - by Nick LaMarca

  I have been asked to create import functionality in my application. I am getting an excel worksheet as input. The worksheet has column headers followed by data. The users want to simply select an xls file from their system, click upload and the tool deletes the table in…

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• Cannot update any cells in datagrid in vb6

  - by Hybrid SyntaX

  Hello I'm trying to update a row in datagrid but the problem is that i can't even change its cell values I had set my datagrid AllowUpdate property to true , but i can't still change any cell values Option Explicit Dim conn As New ADODB.Connection Dim cmd As New…

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• Getting table schema from a query

  - by Appu

  As per MSDN, SqlDataReader.GetSchemaTable returns column metadata for the query executed. I am wondering is there a similar method that will give table metadata for the given query? I mean what tables are involved and what aliases it has got. In my…

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