login form lukker ikke

prøv med Me.disposed og ikke me.close

eller me.hide

... mon ikke fejlen i at du bruger ShowDialog() på din anden form...

prøv

If drSQL.Read = True Then
            Dim Main As New Form1
            Main.Show()
            Me.Close()
        Else
            MessageBox.Show("Authentication failed...")

        End If

hvis jeg laver en Main.Show() lukker hele applicationen bare ned...??

me.hide() giver samme problem som før...

me.disposed virker heller ikke..


andre forslag?

det er fordi at din login-form ligger til grund for hele din application, og når den lukkes, så lukker programmet ned. Dette er en lidt uheldig opbygning.

Du bør istedet lade Form1 ligge til grund for applikationen, og i denne lave et login-tjek, før at man kan få lov at arbejde med den. På den måde kan du lukke login-formen, uden at programmet afslutter.

ok. Hvad skal jeg så gøre for at man ikke kan gøre noget på form1 før man er logget ind?

Well... det her er da en mulighed:

Form1: -------------------

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace _581454
{
    /// <summary>
    /// Summary description for Form1.
    /// </summary>
    public class Form1 : System.Windows.Forms.Form
    {
        public static bool IsAuthenticated;

        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.Container components = null;

        public Form1()
        {
            checkLogin();

            //
            // Required for Windows Form Designer support
            //
            InitializeComponent();

            //
            // TODO: Add any constructor code after InitializeComponent call
            //
        }

        private void checkLogin()
        {
            if (!Form1.IsAuthenticated)
            {
                Form frm = new Form2();
                frm.ShowDialog();

                if (frm.DialogResult == DialogResult.Abort)
                {
                    Environment.Exit(0);
                }
                else if (frm.DialogResult == DialogResult.OK)
                {
                    return;
                }
                else
                {
                    Environment.Exit(0);
                }
            }
        }

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if (components != null)
                {
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }

        #region Windows Form Designer generated code
        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.components = new System.ComponentModel.Container();
            this.Size = new System.Drawing.Size(300,300);
            this.Text = "Form1";
        }
        #endregion

        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.Run(new Form1());
        }
    }
}

Form2: ------------

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;

namespace _581454
{
    /// <summary>
    /// Summary description for Form2.
    /// </summary>
    public class Form2 : System.Windows.Forms.Form
    {
        private System.Windows.Forms.TextBox textBox1;
        private System.Windows.Forms.TextBox textBox2;
        private System.Windows.Forms.Button button1;
        private System.Windows.Forms.Button button2;
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.Container components = null;

        public Form2()
        {
            //
            // Required for Windows Form Designer support
            //
            InitializeComponent();

            //
            // TODO: Add any constructor code after InitializeComponent call
            //
        }

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if(components != null)
                {
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }

        #region Windows Form Designer generated code
        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.textBox1 = new System.Windows.Forms.TextBox();
            this.textBox2 = new System.Windows.Forms.TextBox();
            this.button1 = new System.Windows.Forms.Button();
            this.button2 = new System.Windows.Forms.Button();
            this.SuspendLayout();
            //
            // textBox1
            //
            this.textBox1.Location = new System.Drawing.Point(16, 16);
            this.textBox1.Name = "textBox1";
            this.textBox1.Size = new System.Drawing.Size(128, 20);
            this.textBox1.TabIndex = 0;
            this.textBox1.Text = "Username";
            this.textBox1.Enter += new System.EventHandler(this.textBox1_Enter);
            //
            // textBox2
            //
            this.textBox2.Location = new System.Drawing.Point(16, 48);
            this.textBox2.Name = "textBox2";
            this.textBox2.Size = new System.Drawing.Size(128, 20);
            this.textBox2.TabIndex = 1;
            this.textBox2.Text = "Password";
            this.textBox2.Enter += new System.EventHandler(this.textBox2_Enter);
            //
            // button1
            //
            this.button1.Location = new System.Drawing.Point(48, 80);
            this.button1.Name = "button1";
            this.button1.Size = new System.Drawing.Size(72, 24);
            this.button1.TabIndex = 2;
            this.button1.Text = "Login";
            this.button1.Click += new System.EventHandler(this.button1_Click);
            //
            // button2
            //
            this.button2.Location = new System.Drawing.Point(48, 112);
            this.button2.Name = "button2";
            this.button2.Size = new System.Drawing.Size(72, 24);
            this.button2.TabIndex = 3;
            this.button2.Text = "Cancel";
            this.button2.Click += new System.EventHandler(this.button2_Click);
            //
            // Form2
            //
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
            this.ClientSize = new System.Drawing.Size(168, 149);
            this.Controls.Add(this.button2);
            this.Controls.Add(this.button1);
            this.Controls.Add(this.textBox2);
            this.Controls.Add(this.textBox1);
            this.Name = "Form2";
            this.Text = "Form2";
            this.ResumeLayout(false);

        }
        #endregion

        private void resetTextBox(TextBox tb)
        {
            tb.Text = "";
        }

        private void button1_Click(object sender, System.EventArgs e)
        {
            if (this.textBox1.Text == "1" && this.textBox2.Text == "2")
            {
                Form1.IsAuthenticated = true;
                this.DialogResult = DialogResult.OK;

                this.Close();
            }
            else
            {
                MessageBox.Show("Not authenticated, try again");
            }
        }

        private void button2_Click(object sender, System.EventArgs e)
        {
            this.DialogResult = DialogResult.Abort;
        }

        private void textBox1_Enter(object sender, System.EventArgs e)
        {
            resetTextBox((TextBox)sender);
        }

        private void textBox2_Enter(object sender, System.EventArgs e)
        {
            resetTextBox((TextBox)sender);
        }
    }
}