Fügen Sie Daten aus einem Textfeld in eine Datenbank ein. C#

Question

Hallo Stapelüberlauf Sie sind meine einzige Hoffnung, Es ist meine erste Frage hier. Ich habe Probleme mit dem Einfügen von Dingen in eine Datenbank aus Textfeldern Ich habe es durchsucht Ich habe alles versucht, es funktioniert einfach nicht. Hier ist mein Code ->

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

namespace E_BANK 
{ 
    public partial class Form1 : Form 
    { 
     public Form1() 
     { 
      InitializeComponent(); 
     } 

     private void btn_save_Click(object sender, EventArgs e) 
     { 
      //objekti per konektim me DBne 
      SqlConnection conn = new SqlConnection(@"Data Source=desktop-ndocu0t\sqlexpress;Initial Catalog=MetinShop;Integrated Security=True"); 

      conn.Open(); 
      using (SqlCommand command = conn.CreateCommand()) 
      { 
       using (SqlDataReader reader = command.ExecuteReader()) 
       { 
        while (reader.Read()) 
        { 
         string accref = tb_accref.Text; 
         int deposit = Convert.ToInt32(tb_depamount.Text); 
         int psID = Convert.ToInt32(tb_personalID.Text); 
         string query = "INSERT INTO Bank1(accref, deposit, psID) " + 
       "Values('" + accref + "', '" + deposit + "', '" + psID + "')"; 
        } 
       } 
      } 

      //mbylle lidhjen me DB 
      conn.Close(); 
      MessageBox.Show("Transition Updatet Sucessfully"); 
     } 

     private void btn_reset_Click(object sender, EventArgs e) 
     { 
      tb_accref.Text = ""; 
      tb_depamount.Text = ""; 
      tb_personalID.Text = ""; 
      lblamount.Text = "0"; 
     } 

     private void btn_exit_Click(object sender, EventArgs e) 
     { 
      Close(); 
     } 
    } 
} 

Answer 1

Sie müssen tatsächlich den INSERT-Befehl ausführen. Überprüfen Sie die ExecuteNonQuery-Methode für die SqlCommand-Klasse.

Answer 2

auf diese Weise versuchen

private void btn_save_Click(object sender, EventArgs e) 
    { 

     using (SqlConnection sqlConn = new SqlConnection(@"Data Source=desktop-ndocu0t\sqlexpress;Initial Catalog=MetinShop;Integrated Security=True")) 
     { 
      using (SqlCommand sqlComm = new SqlCommand("INSERT INTO Bank1 (accref, deposit, psID) VALUES (@accref, @deposit, @psID)", sqlConn)) 
      { 
       if (sqlComm.Connection.State == ConnectionState.Closed) 
        sqlComm.Connection.Open(); 
       string accref = tb_accref.Text; 
       int deposit = Convert.ToInt32(tb_depamount.Text); 
       int psID = Convert.ToInt32(tb_personalID.Text); 

       sqlComm.Parameters.AddWithValue("@accref", accref); 
       sqlComm.Parameters.AddWithValue("@deposit", deposit); 
       sqlComm.Parameters.AddWithValue("@psID", psID); 
       sqlComm.ExecuteNonQuery(); 
       MessageBox.Show("Transition Updatet Sucessfully"); 
      } 
     } 
    } 

Answer 3

Befehl

private void btn_save_Click(object sender, EventArgs e) 
{ 
    //objekti per konektim me DBne 
    SqlConnection conn = new SqlConnection(@"Data Source=desktop-ndocu0t\sqlexpress;Initial Catalog=MetinShop;Integrated Security=True"); 

    conn.Open(); 

    string accref = tb_accref.Text; 
    int deposit = Convert.ToInt32(tb_depamount.Text); 
    int psID = Convert.ToInt32(tb_personalID.Text); 
    //try all fields are string 
    string query = "INSERT INTO Bank1(accref, deposit, psID) Values('" + accref + "', '" + deposit + "', '" + psID + "')"; 
    //try last fields are numeric 
    //string query = "INSERT INTO Bank1(accref, deposit, psID) Values('" + accref + "', " + deposit + ", " + psID + ")"; 

    SqlCommand command = new SqlCommand(); 
    command.Connection = conn; 
    command.CommandText = query; 
    command.ExecuteNonQuery() 

    //mbylle lidhjen me DB 
    conn.Close(); 
    MessageBox.Show("Transition Updatet Sucessfully"); 

} 

private void btn_reset_Click(object sender, EventArgs e) 
{ 
    tb_accref.Text = "0"; 
    tb_depamount.Text = "0"; 
    tb_personalID.Text = "0"; 
    lblamount.Text = "0"; 
} 

private void btn_exit_Click(object sender, EventArgs e) 
{ 
    Close(); 
}