asp.net,visual-studio-2013 , ASP.Net Registration Page - how to get foreign key from another table


ASP.Net Registration Page - how to get foreign key from another table

Question:

Tag: asp.net,visual-studio-2013

I am creating an ASP.net website using Visual Studio 2013. Specifically, I am trying to register a customer and insert the data in the customer table at the same time. When I register a customer, I also want to get the user id for that customer (which is inserted into my user accounts table in the database). So essentially I need to get the user id but also need to make sure that is the user id of the current user.

Here's what I tried to do:

String userQueryStr = "SELECT UserAccountID FROM UserAccounts WHERE Username = " + Email.Text;
System.Data.SqlClient.SqlCommand selectCommand = new System.Data.SqlClient.SqlCommand(userQueryStr, conn);
int userID = Convert.ToInt32(selectCommand.ExecuteScalar());     

Email is the username btw. Essentially I am trying to make sure the Username field in the UserAccounts matches what is typed in the textbox on the registration page. Then I tried to store an insert statement and also pass the userID int variable which is storing the Current user id from the User Account Table. My problem is, after I run the application when I click the Registration button I get this error when I type the username [email protected]:

An exception of type 'System.Data.SqlClient.SqlException' occurred in System.Data.dll but was not handled in user code Additional information: The multi-part identifier "[email protected]" could not be bound. The exception is thrown at this line:

int userID = Convert.ToInt32(selectCommand.ExecuteScalar());   

Answer:

Sql thinks your email is a field, because you don't have quotes before and after

String userQueryStr = "SELECT UserAccountID FROM UserAccounts WHERE Username =     '" + Email.Text+"'";

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