A An exception of type 'System.Data.SqlClient.SqlException' occurred in System.Data.dll but was not handled in user code

Question

I'm trying to insert records in ASP.NET to table but I don't know why I am getting this error. Please help me solve this error. Help is appreciated.

This is the screenshot of table:

[![enter image description here][1]][1]

This is the error code I am getting:

An exception of type 'System.Data.SqlClient.SqlException' occurred in System.Data.dll but was not handled in user code

This is Exceptional error image:

[![2][2]][2]

Answer 1

There are two problems in your query:

1. Table is a keyword in SQL, so you cannot use it in that way. Either rename the table and give a name that is no keyword in SQL or escape the name in brackets:

    INSERT INTO [Table]... 

   Obviously, that is what the exception message tells you.

2. If your id column is not auto-incremented, you need to pass a value for this column, too, because it must not be NULL as your table declaration shows.

Answer 2

Try to rename the table name. Also, you can put a breakpoint after you're setting the cmd object to see how the insert statement looks.

SqlCommand cmd = new SqlCommand("insert into TableName values(@username)",con);
cmd.Parameters.AddWithValue("@username", Username.Text);