Solved

How to pass a c# variable to a sql datasource (asp c# sql server)

Posted on 2009-07-09
4
291 Views
Last Modified: 2012-05-07
Hi, please see the code below.  I am trying to access a c# variable in a sqldatasource definition.  Could someone please tell me what I need to change to that I can use the domain variable in the WHERE?  Thanks!  I've been trying for hours...   (I am new to asp, c#  and sql server, since last 2 days).
I have the follwing code in a c# aspx file:
 

<%string domain = (HttpContext.Current.Request.ServerVariables["HTTP_HOST"]);%>
 

<asp:SqlDataSource ID="SqlDataSource1" runat="server" 

        ConnectionString="<%$ ConnectionStrings:testfirststring %>" 

        SelectCommand="SELECT testField FROM table1test WHERE testField = '<% domain %>' "></asp:SqlDataSource>
 

I am missing something to have the domain variable to be accessible in the where statement.
 

Everything else works (for now)!  :)

Open in new window

0
Comment
Question by:ThanksWelcome
  • 2
  • 2
4 Comments
 
LVL 13

Expert Comment

by:crazyman
ID: 24814539
just override OnPreRender and add the following :

protected override void OnPreRender(EventArgs e)
{
         this.SqlDataSource1.SelectCommand = String.Format("SELECT testField FROM table1test WHERE testField ='{0}'",HttpContext.Current.Request.ServerVariables["HTTP_HOST"]);
}
0
 

Author Comment

by:ThanksWelcome
ID: 24814607
Hi, thanks for your help.

Unfortunately, being a newbie, I have absolutery no clue of how to override OnPreRender as you ask.

Also, I do not know where to add the code you provided.

Thanks for more details!

0
 
LVL 13

Accepted Solution

by:
crazyman earned 500 total points
ID: 24815081
Just place it in the code behind, or even inside.

<script runat="server" type="text/C#">
</script>
Then dont set you SelectCommand on your SqlDataSource in the markup..
0
 

Author Closing Comment

by:ThanksWelcome
ID: 31601631
Woooohooo!!!  It works!  So happy, thank's!  (I'm do not understanding why, though, because I do not understand what do this function. Any extra thought? For example, what is the purpuse of the {0}? )  Thank's!
0

Featured Post

Comprehensive Backup Solutions for Microsoft

Acronis protects the complete Microsoft technology stack: Windows Server, Windows PC, laptop and Surface data; Microsoft business applications; Microsoft Hyper-V; Azure VMs; Microsoft Windows Server 2016; Microsoft Exchange 2016 and SQL Server 2016.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Learn by example how to specify CSS selectors for Selenium WebDriver test automation software.
This article aims to explain the working of CircularLogArchiver. This tool was designed to solve the buildup of log file in cases where systems do not support circular logging or where circular logging is not enabled
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions. Consider email address RFCs: Look at HTML5 form input element (with type=email) regex pattern: T…
The viewer will learn how to dynamically set the form action using jQuery.

867 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

15 Experts available now in Live!

Get 1:1 Help Now