Parameterized query with Select Command

string connectionString = "workstation id=AALOK;packet size=4096;user id=sa;data source=AALOK;persist security info=False;initial catalog=aks";

conn = new SqlConnection(connectionString);
string commandString = "SELECT QuesID, QuesDet, Quiz_Name FROM ak";

dataAdapter = new SqlDataAdapter(commandString, conn);
ds = new DataSet();
dataAdapter.Fill(ds,"Ak");
dataTable = ds.Tables["Ak"];


I have created an application using C# 2003 with SQL Server 2000.
The above code is working fine, but my requirement is to add "where Quiz_Name=@Quiz_Name" into the commandString and to set @Quiz_Name="Some string".
Can anyone help me to write the correct code?

Hi,

Try something like this:

SqlCommand cmd = new SqlCommand("SELECT QuesID, QuesDet, Quiz_Name FROM ak WHERE Quiz_Name = @Quiz_Name", conn);
cmd.Parameters.AddWithValue("Quiz_Name", "Some string");
SqlDataAdapter dataAdapter = new SqlDataAdapter(cmd);

Hope this helps,
Alan
www.rapidqualitysystems.com - Taking automated documentation to new heights

Thanks dear for your reply.
I have tried the code given by you and getting error:- "System.Data.SqlClient.SqlParameterCollection' does not contain a definition for 'AddWithValue'".

Aalok

Hi Aalok,

I don't know what version of .NET you are running, but I can only assume that the AddWithValue method is not available in your version.

AddWithValue is not the only way to add a parameter. May I direct you towards the SqlCommand documentation: http://msdn.microsoft.com/en-us/libr...v=VS.100).aspx

There are also some examples that you can try on this page: http://msdn.microsoft.com/en-us/libr...v=VS.100).aspx

I hope this helps.

Alan
www.rapidqualitysystems.com - Taking automated documentation to new heights