Retrieving values from an IDataReader
Despite the undoubted advantages of ORM you probably need to fetch data directly from an IDataReader from time to time. Getting values out of the data reader is easy at first glance. However, there are some issues that you should be aware of. Basic usage Assume we have a simple table that holds comments for a web log or something similar: (The UI is German, but I guess you know what the columns mean. If not: it's "Column name", "Data type" and "Allow Nulls") Let's query all data in the
Data Flow Enumerator Script
You have probably already seen this scenario. You want to load data, do transformations over it and then enumerate the result data flow in a standard for each loop container. The recommended Microsoft solution is to direct your data flow to in-memory ADO recordset destination component and then setup the for each loop container to iterate the result ADO recordset. As you probably understand this solution has one major shortcoming. It is extremely memory intensive and has unpredictable performanc
Another Error Message – Access Denied on Profile Import
I noticed the error message below repeatedly in event viewer and realized it was happening every time a profile import was happening. Event Type: Error Event Source: Office SharePoint Server Event Category: Office Server General Event ID: 7888 Date: 6/27/2008 Time: 11:37:17 AM User: N/A Computer: ServerName Description: A runtime exception was detected. Details follow. Message: Access Denied! Only site admin can access Data Source object from us
populate datasource control from DDL
Hi I need to populate a DataSource control with an id from a ddl, this DataSource control the populates a ddl. I have no clue how to pass the id to the DataSource control, I have tried a few things but no luck yet. my application is built on a 3 tier design, BL,BO,DA layers. I'll post the code relevant for the DataSource control i'm trying to populate. DA: (in my DA i also have a class that holds my querystrings) the query: Code: Public Class QueryZonesDB Public Shared
A functional approach to data access code, updated for C# 3.0
I've been a bit too busy with work and other things to finish the Linq translation posts, though I will return to them when I get some free time. For now I'll post some other things I had already drafted, and which are probably more interesting to most people anyway. Last year I noted that most data access code follows very similar patterns, and described how higher order procedures can be used to encapsulate them using C# 2.0, which leads to much simpler and more concise code. Recently I've r
Using the BDC to sync profile data error
I wrote a web service to query LDAP so I can merge data from AD and another LDAP source. The web service seems to work fine. It has a finder and a specific finder method. I used BDC Metaman to create the definition and imported to MOSS. So far so good. Mapped the user profile properties to the BDC source. Tried to sync the profile data and it wasn't working. I was getting the following exceptions; 03/15/2008 11:20:37.92 mssdmn.exe (0x1464) 0x0090 SharePoint Po
IDataRecord Interface (System.Data)
Provides access to the column values within each row for a DataReader, and is implemented by .NET Framework data providers that access relational databases.
IDataRecord Interface
Implements IDataRecord and ICustomTypeDescriptor, and provides data binding ... The IDataReader and IDataRecord interfaces enable an inheriting class to ...
BuildUniqueKey(Type,IDataRecord) Method
... Type Dim dataRecord As IDataRecord Dim value As String ... protected string BuildUniqueKey( Type type, IDataRecord dataRecord ) Managed Extensions for C++ ...
A workshop on .NET applications design and development. ... The IDataReader and IDataRecord interfaces allow an inheriting class to ...
IDataRecord Fields to Dictionary Extension Method
I have never been a fan of directly passing IDataRecords, or IDataReaders for that matter, about the place to get simple field values out.
dblinq2007 - Google Code
public static event Func GetString; internal static string OnGetString(object src, Type t, IDataRecord dr, int index) ...
CsvDataReader Members
IDataRecord.GetBoolean. IDataRecord.GetByte. IDataRecord.GetBytes. IDataRecord.GetChar ... IDataRecord.GetChars. IDataRecord.GetData. IDataRecord. ...
public static Func CompileRowDelegate ... ParameterExpression rdr = Expression.Parameter(typeof(IDataRecord), rdr ...
www.thoughtproject.com/Snippets/FieldReader/FieldReader.cs.txt
... Reads a Guid from the specified field of an IDataRecord structure. ... ReadNullableDateTime( IDataRecord record, string fieldName) { if (record == null) ...
Base4.net
Why then does IDataReader not implement IEnumerable ... public static IEnumerable GetRecords(this SqlConnection connection, string SQL) ...
made an IDataReader expose itself as an IEnumerable<IDataRecord>. now LINQ-able! Gotta love extension methods and the magic of yield
@john_miller IDataReader off of the DataRecordCollection and Fill(IDataRecord/IDataReader) are the best things we every did.
var parts = from IDataRecord record in partsReader select new { PartNumber = record.GetString(0), Description = record.GetString(1) };
C#, .Net Framework: IDataRecord Fields to Dictionary Extension Method
A Journal about the experiences I have developing little applications in C#, Perl, Html and Javascript and talking about things new things that I use. Always Geeky; Always Nerdy;
C#, .Net Framework
... with the introduction of C# 3.0 and Extension Methods, I thought it would be cool to write (and share) a simple implementation of some code that I use to convert the IDataRecord ...
Fun With Extension Methods - Extending IDataRecord Part 2 - Imar ...
This article shows how to extend IDataRecord (or IDataReader) with a method that allows you to check whether a given field exists.
Fun With Extension Methods - Extending IDataRecord - Imar.Spaanjaars ...
This article shows you how to extend the IDataRecord interface to make it easier to get data from data readers based on a column name instead of a column index.
ANSI C programming training courses, articles and tutorials, Learn the structure and mythology of programming using C++.
MySQL Bugs: #19294: IDataRecord.GetString method should return null ...
Bug #19294: IDataRecord.GetString method should return null for null values: Submitted: 24 Apr 2006 11:15: Modified: 24 Aug 2006 11:27: Reporter: Thomas Krüger
Mono Documentation
System.Reflection.DefaultMember("Item")] public interface IDataRecord. Remarks Documentation for this section has not yet been entered. Requirements
This is despite that fact that fundamentally a IDataReader is used for enumerating IDataRecord 's? Why then does IDataReader not implement IEnumerable < IDataRecord
The properties of System.Data.IDataRecord are listed below. For a list of all members, see the IDataRecord Members list. Public Properties
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