How To Pass Variable Into Sqlcommand Statement And Insert Into Database Table

I'm writing a small program in C# that uses SQL to store values into a database at runtime based on input by the user. The only problem is I can't figure out the correct Sql syntax

Solution 1:

Add a parameter to the command before executing it:

cmd.Parameters.Add("@num", SqlDbType.Int).Value = num;

Solution 2:

You didn't provide a value for the @ parameter in the SQL statement. The @ symbol indicates a kind of placeholder where you will pass a value through.

Use an SqlParameter object like is seen in this example to pass a value to that placeholder/parameter.

There are many ways to build a parameter object (different overloads). One way, if you follow the same kind of example, is to paste the following code after where your command object is declared:

// Define a parameter object and its attributes.var numParam = new SqlParameter();
        numParam.ParameterName = " @num";
        numParam.SqlDbType = SqlDbType.Int;
        numParam.Value = num; //   <<< THIS IS WHERE YOUR NUMERIC VALUE GOES. // Provide the parameter object to your command to use:
        cmd.Parameters.Add( numParam );