How Can I Capture PRINT Output from Stored Procedures in .NET?

Retrieving PRINT Output from Stored Procedures in .NET Applications

Effectively capturing PRINT output from stored procedures in .NET applications is essential, particularly when dealing with older systems that use PRINT statements for error handling and logging. Let's illustrate how to capture the output "word" from the stored procedure "usp_PrintWord":

<code class="language-sql">-- Stored Procedure
CREATE PROC usp_PrintWord
AS
BEGIN
    PRINT 'word'
END;</code>

.NET Solution:

The following steps demonstrate how to capture this PRINT output within your .NET code:

1. Attach an Event Handler: Subscribe to the InfoMessage event of your SQL connection. This event fires for informational messages generated during database interactions.

<code class="language-csharp">myConnection.InfoMessage += new SqlInfoMessageEventHandler(myConnection_InfoMessage);</code>

2. Process the Event: Inside the event handler, access the Message property of the SqlInfoMessageEventArgs to retrieve the PRINT output.

<code class="language-csharp">void myConnection_InfoMessage(object sender, SqlInfoMessageEventArgs e)
{
    Console.WriteLine(e.Message);
}</code>

3. Execute the Stored Procedure: Execute your stored procedure using SqlCommand as you normally would. The PRINT output will be captured and displayed in the console (or wherever your event handler directs the output).

This approach provides a simple and effective way to access PRINT output from your stored procedures.

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