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11.27.2007 at 07:19PM PST, ID: 22986714
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9.2

SqlTypes and DBNull

Asked by CoconutTelegraph in C# Programming Language, .NET, Programming for ASP.NET

Tags: , ,

Hi experts!

This is just a simple design question. I'm working on a DAL. I've got a class that reads a row of data from the database and stores each column as it's own member variable / property. You can modify most of the properties and then call a "Save" method which writes the object properties back to the DB.

Anyhow, what is the best way to preserve DBNulls. If the value is DBNull I want to keep that value in a variable but also be able to set it to a value of it's SqlType. I thought using the SqlTypes would allow for this but they don't. I hope that's clear. Many thanks for looking!

Here's the error which kind of shows what I'm going for.

Error      53      Cannot implicitly convert type 'System.DBNull' to 'System.Data.SqlTypes.SqlChars'      

Thanks!!!
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private SqlChars mRefID = DBNull.Value;
public SqlChars RefID
{
	get { return mRefID; }
	internal set { mRefID = value; }
}
[+][-]11.27.2007 at 08:58PM PST, ID: 20363342

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Zones: C# Programming Language, .NET, Programming for ASP.NET
Tags: convert, cannot, type
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Solution Provided By: JimBrandley
Participating Experts: 3
Solution Grade: A
 
 
[+][-]11.27.2007 at 09:05PM PST, ID: 20363366

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[+][-]11.27.2007 at 10:23PM PST, ID: 20363569

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[+][-]11.28.2007 at 10:07AM PST, ID: 20367337

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[+][-]11.28.2007 at 10:24AM PST, ID: 20367473

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[+][-]11.28.2007 at 10:29AM PST, ID: 20367508

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[+][-]11.28.2007 at 10:51AM PST, ID: 20367650

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