SQL无法在C＃上运行，但可以在SQL Server Management Studio中运行

Question

Update should be updating the data in the confirm table with the given parameters. However no input gets updated/inputted despite there being no errors. When the exact same query is inputted into the SQL Server Management Studio there is no errors and the rows are updated.

Why is the table not being updated?

There are 3 columns in the table - orderid (which is passed from another table) and then staffid and confirmed which should both be NULL - and are - until the rows are updated. orderid = int not null, staffid = int, confirmed = string. confirm database

The view is a left outer join, meaning that it shows the values that need to be update by the by.

[sql ][2]

database diagram

Form

How can this be fixed, its been like this for two days.

  using System;
    using System.Collections.Generic;
    using System.ComponentModel;
    using System.Data;
    using System.Drawing;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
    using System.Windows.Forms;
    using System.Data.SqlClient;
    using System.Data.SqlTypes;

    namespace ComicBookShop
    {
        public partial class orders_confirm : Form
        {

            public orders_confirm()
            {
                InitializeComponent();
            }
            //database details
            string connString = "Data Source = BLAH BLAH BLAH";


            private void btnBack_Click(object sender, EventArgs e)
            {
                this.Hide();
                ManagmentMain fm = new ManagmentMain();
                fm.Show();
            }

            private void orders_confirm_Load(object sender, EventArgs e)
            {

                SqlConnection con = new SqlConnection(connString);
                using (SqlConnection conn = new SqlConnection(connString))
                {
                    using (SqlCommand cmd = new SqlCommand("SELECT * FROM staff_view", con))
                    {
                        cmd.CommandType = CommandType.Text;
                        using (SqlDataAdapter sda = new SqlDataAdapter(cmd))
                        {
                            using (DataTable dt = new DataTable())
                            {
                                sda.Fill(dt);

                                //Set AutoGenerateColumns False
                                dataGridView5.AutoGenerateColumns = true;


                                dataGridView5.DataSource = dt;

                            }
                        }
                    }


                    con.Close();
                }

            }
            private void btnUpdate_Click(object sender, EventArgs e)
            {
                if (txtConfirmed.Text == "" || txtorder.Text == "" || txtstaff.Text == "")
                {
                    MessageBox.Show("Please fill textboxes");
                    return;
                }
                //database details
                string connString = "Data Source = aak; Initial Catalog = aa; User ID = aa; Password = aa";
                SqlConnection con = new SqlConnection(connString);
                using (SqlConnection conn = new SqlConnection(connString))
                {
                    using (SqlCommand command = con.CreateCommand())
                    {
                        try
                        {

                            con.Open();
                            command.CommandText = "Update dbo.confirm set staffid=@staffid, confirmed=@confirmed where orderid =@orderid";

                            command.Parameters.AddWithValue("@orderid", txtorder.Text);
                            command.Parameters.AddWithValue("@staffid", txtstaff.Text);
                            command.Parameters.AddWithValue("@confirmed", txtConfirmed.Text);

                            command.ExecuteNonQuery();

                            con.Close();
                            MessageBox.Show("Updated");

                        }

                        catch (SqlException ex)
                        {
                            Console.WriteLine(ex.Message);
                        }
                    }
                }


            }
        }
    }

this is the part of the code where the data should be inserted

 private void btnUpdate_Click(object sender, EventArgs e)
            {
                if (txtConfirmed.Text == "" || txtorder.Text == "" || txtstaff.Text == "")
                {
                    MessageBox.Show("Please fill textboxes");
                    return;
                }
                //database details
                string connString = "Data Source = aak; Initial Catalog = aa; User ID = aa; Password = aa";
                SqlConnection con = new SqlConnection(connString);
                using (SqlConnection conn = new SqlConnection(connString))
                {
                    using (SqlCommand command = con.CreateCommand())
                    {
                        try
                        {

                            con.Open();
                            command.CommandText = "Update dbo.confirm set staffid=@staffid, confirmed=@confirmed where orderid =@orderid";

                            command.Parameters.AddWithValue("@orderid", txtorder.Text);
                            command.Parameters.AddWithValue("@staffid", txtstaff.Text);
                            command.Parameters.AddWithValue("@confirmed", txtConfirmed.Text);

                            command.ExecuteNonQuery();

                            con.Close();
                            MessageBox.Show("Updated");

                        }

                        catch (SqlException ex)
                        {
                            Console.WriteLine(ex.Message);
                        }
                    }
                }

Answer 1

Try setting parameters with their corresponding data types:

 command.Parameters.Add("orderid", SqlDbType.Int);
 command.Parameters["orderid"].Value = int.Parse(txtorder.Text);

Do the same for staffid .

I think the issue is you are passing string where int is expected.