sql - 如何在sql查询中传递整型变量

Question

int no = FormView1.PageIndex;

查询:-

  SqlCommand cmd =  new SqlCommand("select Answer from Questions where QuestionNo = @no", cn);

Answer 1

你必须添加一个参数:

int no = FormView1.PageIndex;
SqlCommand cmd = 
    new SqlCommand("select Answer from Questions where QuestionNo = @no", cn);

// Set the parameter up before executing the command
cmd.Parameters.Add("@no", SqlDbType.Int);
cmd.Parameters["@no"].Value = no;