Solved

Help SqlCommand will not return data

Posted on 2008-10-08
7
376 Views
Last Modified: 2012-06-27
I cannot seem to get this command to return data, an anyone tell me what I am doing wrong?

SqlCommand queryCommand = new SqlCommand(string.Format("Select * from table where Account = '{0}'", txtAccountInput.Text));
SqlCommand queryCommand = new SqlCommand(string.Format("Select * from table where Account = '{0}'", txtAccountInput.Text));

Open in new window

0
Comment
Question by:ATaiPan
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
7 Comments
 
LVL 10

Expert Comment

by:oxyoo
ID: 22668766
Hi,

Could you post the entire C# code, the connection part as well as
where you run your command?

Thanks.
0
 
LVL 143

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 22668805
please try this instead, replacing the data type and size as needed:
SqlCommand queryCommand = new SqlCommand("Select * from table where Account = @acc");
SqlParameter p = new System.Data.SqlClient.SqlParameter("@acc", System.Data.SqlDbType.NVarChar, 10, txtAccountInput.Text);
queryCommand.Parameters.Add(p);

Open in new window

0
 

Author Comment

by:ATaiPan
ID: 22669746
Well, now I have a new error "The parameterized query '(acc nvarchar(10))Select * from table where Account = @acc' expects the parameter @acc" which is not supplied.
0
Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 143

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 22669763
you will need to show more code so we can see where you made the error.
0
 
LVL 10

Expert Comment

by:eguilherme
ID: 22670096
SqlCommand queryCommand = new SqlCommand(string.Format("Select * from table where Account = '{0}'", txtAccountInput.Text));

after this do:

SqlDataReader Reader = queryCommand.ExecuteReader();
while(Reader.Read())
{
   // use Reader[field_name] to get the values
}
0
 
LVL 10

Accepted Solution

by:
oxyoo earned 50 total points
ID: 22718448
Try to modify the code as done below and see if it helps..

Good Luck!

SqlCommand queryCommand = new SqlCommand("Select * from table where Account = @acc");
queryCommand.CommandType = CommandType.Text
queryCommand.Parameters.AddWithValue("@acc", txtAccountInput.Text);

Open in new window

0
 
LVL 10

Expert Comment

by:oxyoo
ID: 22718474
Here is a more complete example...
using(SqlConnection connection = new SqlConnection("connectionstring") ) {
  SqlCommand command = new SqlCommand("Select * from table where Account = @acc", connection);
  command.CommandType = CommandType.Text;
  command.Parameters.AddWithValue("@acc", txtAccountInput.Text);
  connection.Open();
 
  SqlDataReader reader = command.ExecuteReader();
  while(reader.Read()) {
    // magic goes here...
  }
 
  connection.Close();
}

Open in new window

0

Featured Post

On Demand Webinar - Networking for the Cloud Era

This webinar discusses:
-Common barriers companies experience when moving to the cloud
-How SD-WAN changes the way we look at networks
-Best practices customers should employ moving forward with cloud migration
-What happens behind the scenes of SteelConnect’s one-click button

Question has a verified solution.

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

Introduction This article series is supposed to shed some light on the use of IDisposable and objects that inherit from it. In essence, a more apt title for this article would be: using (IDisposable) {}. I’m just not sure how many people would ge…
It was really hard time for me to get the understanding of Delegates in C#. I went through many websites and articles but I found them very clumsy. After going through those sites, I noted down the points in a easy way so here I am sharing that unde…
If you're a developer or IT admin, you’re probably tasked with managing multiple websites, servers, applications, and levels of security on a daily basis. While this can be extremely time consuming, it can also be frustrating when systems aren't wor…
In this video we outline the Physical Segments view of NetCrunch network monitor. By following this brief how-to video, you will be able to learn how NetCrunch visualizes your network, how granular is the information collected, as well as where to f…

718 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