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In: Computer Science

C# Programming Discuss how to build a Multi-Form Windows application in C#. That is an App...

C# Programming

Discuss how to build a Multi-Form Windows application in C#. That is an App that has more than one form, like say maybe 5 forms. How do you connect these forms and pass data objects between these forms?

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Expert Solution

In case of any query do comment. Please rate answer as well. Thanks

Code:

===From1.cs==

using System;

using System.Windows.Forms;

namespace MultiFormAppDisplay

{

    public partial class Form1 : Form

    {

        public string Data { get; set; }

        public Form1()

        {

            InitializeComponent();

        }

        private void button1_Click(object sender, EventArgs e)

        {

            Form2 frm = new Form2(this.textBox1.Text);

            frm.ShowDialog();

            this.textBox1.Text = frm.Data;

        }

        private void Form1_Load(object sender, EventArgs e)

        {

        }

        /// <summary>

        /// showing and passing data back to the property can be further used

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void Form1_Deactivate(object sender, EventArgs e)

        {

            this.Data = this.textBox1.Text;

        }

    }

}

====Form1.designer.cs===

namespace MultiFormAppDisplay

{

    partial class Form1

    {

        /// <summary>

        /// Required designer variable.

        /// </summary>

        private System.ComponentModel.IContainer components = null;

        /// <summary>

        /// Clean up any resources being used.

        /// </summary>

        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>

        protected override void Dispose(bool disposing)

        {

            if (disposing && (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.button1 = new System.Windows.Forms.Button();

          this.label1 = new System.Windows.Forms.Label();

            this.textBox1 = new System.Windows.Forms.TextBox();

            this.SuspendLayout();

            //

            // button1

            //

            this.button1.Location = new System.Drawing.Point(224, 256);

            this.button1.Name = "button1";

            this.button1.Size = new System.Drawing.Size(165, 62);

            this.button1.TabIndex = 0;

            this.button1.Text = "Pass Data to Other Form";

            this.button1.UseVisualStyleBackColor = true;

            this.button1.Click += new System.EventHandler(this.button1_Click);

            //

            // label1

            //

            this.label1.AutoSize = true;

            this.label1.Location = new System.Drawing.Point(220, 108);

            this.label1.Name = "label1";

            this.label1.Size = new System.Drawing.Size(87, 20);

            this.label1.TabIndex = 1;

            this.label1.Text = "Enter Data";

            //

            // textBox1

            //

            this.textBox1.Location = new System.Drawing.Point(224, 179);

            this.textBox1.Name = "textBox1";

            this.textBox1.Size = new System.Drawing.Size(200, 26);

            this.textBox1.TabIndex = 0;

            //

            // Form1

            //

            this.AutoScaleDimensions = new System.Drawing.SizeF(9F, 20F);

            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;

            this.ClientSize = new System.Drawing.Size(800, 450);

            this.Controls.Add(this.textBox1);

            this.Controls.Add(this.label1);

            this.Controls.Add(this.button1);

            this.Name = "Form1";

            this.Text = "Form1";

            this.Deactivate += new System.EventHandler(this.Form1_Deactivate);

            this.Load += new System.EventHandler(this.Form1_Load);

            this.ResumeLayout(false);

            this.PerformLayout();

        }

        #endregion

        private System.Windows.Forms.Button button1;

        private System.Windows.Forms.Label label1;

        private System.Windows.Forms.TextBox textBox1;

    }

}

===From2.cs===

using System;

using System.Windows.Forms;

namespace MultiFormAppDisplay

{

    public partial class Form2 : Form

    {

        public string Data { get; set; }

        public Form2()

        {

            InitializeComponent();

        }

        /// <summary>

        /// This constructor is used to pass data between forms

        /// </summary>

        /// <param name="data"></param>

        public Form2(string data)

        {

            this.Data = data;

            InitializeComponent();

        }

        private void Form2_Load(object sender, EventArgs e)

        {

            this.textBox1.Text = this.Data;

        }

        private void button1_Click(object sender, EventArgs e)

        {

            Form3 frm = new Form3(this.textBox1.Text);

            frm.ShowDialog();

            this.textBox1.Text = frm.Data;

        }

        /// <summary>

        /// showing and passing data back to the property can be further used

        /// </summary>

        /// <param name="sender"></param>

       /// <param name="e"></param>

        private void Form2_Deactivate(object sender, EventArgs e)

        {

            this.Data = this.textBox1.Text;

        }

    }

}

===From2.designer.cs===

namespace MultiFormAppDisplay

{

    partial class Form2

    {

        /// <summary>

        /// Required designer variable.

        /// </summary>

        private System.ComponentModel.IContainer components = null;

        /// <summary>

        /// Clean up any resources being used.

        /// </summary>

        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>

        protected override void Dispose(bool disposing)

        {

            if (disposing && (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.button1 = new System.Windows.Forms.Button();

            this.label1 = new System.Windows.Forms.Label();

            this.textBox1 = new System.Windows.Forms.TextBox();

            this.SuspendLayout();

            //

            // button1

            //

            this.button1.Location = new System.Drawing.Point(144, 274);

            this.button1.Name = "button1";

            this.button1.Size = new System.Drawing.Size(165, 62);

            this.button1.TabIndex = 1;

            this.button1.Text = "Pass Data to Other Form";

            this.button1.UseVisualStyleBackColor = true;

            this.button1.Click += new System.EventHandler(this.button1_Click);

            //

            // label1

            //

            this.label1.AutoSize = true;

            this.label1.Location = new System.Drawing.Point(140, 99);

            this.label1.Name = "label1";

            this.label1.Size = new System.Drawing.Size(185, 20);

            this.label1.TabIndex = 2;

            this.label1.Text = "Data from Previous Form";

            //

            // textBox1

            //

            this.textBox1.Location = new System.Drawing.Point(144, 160);

            this.textBox1.Name = "textBox1";

            this.textBox1.Size = new System.Drawing.Size(200, 26);

            this.textBox1.TabIndex = 3;

            //

            // Form2

            //

            this.AutoScaleDimensions = new System.Drawing.SizeF(9F, 20F);

            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;

            this.ClientSize = new System.Drawing.Size(800, 450);

            this.Controls.Add(this.textBox1);

            this.Controls.Add(this.label1);

            this.Controls.Add(this.button1);

            this.Name = "Form2";

            this.Text = "Form2";

            this.Deactivate += new System.EventHandler(this.Form2_Deactivate);

            this.Load += new System.EventHandler(this.Form2_Load);

            this.ResumeLayout(false);

            this.PerformLayout();

        }

        #endregion

        private System.Windows.Forms.Button button1;

        private System.Windows.Forms.Label label1;

        private System.Windows.Forms.TextBox textBox1;

    }

}

===From3.cs===

using System;

using System.Windows.Forms;

namespace MultiFormAppDisplay

{

    public partial class Form3 : Form

    {

        public string Data { get; set; }

        public Form3()

        {

            InitializeComponent();

        }

        /// <summary>

        /// This constructor is used to pass data between forms

        /// </summary>

        /// <param name="data"></param>

        public Form3(string data)

        {

            this.Data = data;

            InitializeComponent();

        }

        private void Form3_Load(object sender, EventArgs e)

        {

            this.textBox1.Text = this.Data;

        }

        private void button1_Click(object sender, EventArgs e)

        {

            Form4 frm = new Form4(this.textBox1.Text);

            frm.ShowDialog();

            this.textBox1.Text = frm.Data;

        }

        /// <summary>

        /// showing and passing data back to the property can be further used

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void Form3_Deactivate(object sender, EventArgs e)

        {

           this.Data = this.textBox1.Text;

        }

    }

}

===From3.designer.cs===

namespace MultiFormAppDisplay

{

    partial class Form3

    {

        /// <summary>

        /// Required designer variable.

        /// </summary>

        private System.ComponentModel.IContainer components = null;

        /// <summary>

        /// Clean up any resources being used.

        /// </summary>

        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>

        protected override void Dispose(bool disposing)

        {

            if (disposing && (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.button1 = new System.Windows.Forms.Button();

            this.label1 = new System.Windows.Forms.Label();

            this.textBox1 = new System.Windows.Forms.TextBox();

            this.SuspendLayout();

            //

            // button1

            //

            this.button1.Location = new System.Drawing.Point(203, 259);

            this.button1.Name = "button1";

            this.button1.Size = new System.Drawing.Size(165, 62);

            this.button1.TabIndex = 1;

            this.button1.Text = "Pass Data to Other Form";

            this.button1.UseVisualStyleBackColor = true;

            this.button1.Click += new System.EventHandler(this.button1_Click);

            //

            // label1

            //

            this.label1.AutoSize = true;

            this.label1.Location = new System.Drawing.Point(199, 94);

            this.label1.Name = "label1";

            this.label1.Size = new System.Drawing.Size(185, 20);

            this.label1.TabIndex = 3;

            this.label1.Text = "Data from Previous Form";

            //

            // textBox1

            //

            this.textBox1.Location = new System.Drawing.Point(203, 143);

            this.textBox1.Name = "textBox1";

            this.textBox1.Size = new System.Drawing.Size(200, 26);

            this.textBox1.TabIndex = 4;

            //

            // Form3

            //

            this.AutoScaleDimensions = new System.Drawing.SizeF(9F, 20F);

            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;

            this.ClientSize = new System.Drawing.Size(800, 450);

            this.Controls.Add(this.textBox1);

            this.Controls.Add(this.label1);

            this.Controls.Add(this.button1);

            this.Name = "Form3";

            this.Text = "Form3";

            this.Deactivate += new System.EventHandler(this.Form3_Deactivate);

            this.Load += new System.EventHandler(this.Form3_Load);

            this.ResumeLayout(false);

            this.PerformLayout();

        }

        #endregion

        private System.Windows.Forms.Button button1;

        private System.Windows.Forms.Label label1;

        private System.Windows.Forms.TextBox textBox1;

    }

}

===From4.cs===

using System;

using System.Windows.Forms;

namespace MultiFormAppDisplay

{

    public partial class Form4 : Form

    {

        public string Data { get; set; }

        public Form4()

        {

            InitializeComponent();

        }

        /// <summary>

        /// This constructor is used to pass data between forms

        /// </summary>

        /// <param name="data"></param>

        public Form4(string data)

        {

            this.Data = data;

            InitializeComponent();

        }

        private void Form4_Load(object sender, EventArgs e)

        {

            this.textBox1.Text = this.Data;

        }

        private void button1_Click(object sender, EventArgs e)

        {

            Form5 frm = new Form5(this.textBox1.Text);

            frm.ShowDialog();

            this.textBox1.Text = frm.Data;

        }

        /// <summary>

        /// showing and passing data back to the property can be further used

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void Form4_Deactivate(object sender, EventArgs e)

        {

            this.Data = this.textBox1.Text;

        }

    }

}

===From4.designer.cs===

namespace MultiFormAppDisplay

{

    partial class Form4

    {

        /// <summary>

        /// Required designer variable.

        /// </summary>

        private System.ComponentModel.IContainer components = null;

        /// <summary>

        /// Clean up any resources being used.

        /// </summary>

        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>

        protected override void Dispose(bool disposing)

        {

            if (disposing && (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.button1 = new System.Windows.Forms.Button();

            this.label1 = new System.Windows.Forms.Label();

            this.textBox1 = new System.Windows.Forms.TextBox();

            this.SuspendLayout();

            //

            // button1

            //

            this.button1.Location = new System.Drawing.Point(148, 278);

            this.button1.Name = "button1";

            this.button1.Size = new System.Drawing.Size(165, 62);

            this.button1.TabIndex = 1;

            this.button1.Text = "Pass Data to Other Form";

            this.button1.UseVisualStyleBackColor = true;

            this.button1.Click += new System.EventHandler(this.button1_Click);

            //

            // label1

            //

            this.label1.AutoSize = true;

            this.label1.Location = new System.Drawing.Point(144, 101);

            this.label1.Name = "label1";

            this.label1.Size = new System.Drawing.Size(185, 20);

            this.label1.TabIndex = 3;

            this.label1.Text = "Data from Previous Form";

            //

            // textBox1

            //

            this.textBox1.Location = new System.Drawing.Point(148, 191);

            this.textBox1.Name = "textBox1";

            this.textBox1.Size = new System.Drawing.Size(200, 26);

            this.textBox1.TabIndex = 4;

            //

            // Form4

            //

            this.AutoScaleDimensions = new System.Drawing.SizeF(9F, 20F);

            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;

            this.ClientSize = new System.Drawing.Size(800, 450);

            this.Controls.Add(this.textBox1);

            this.Controls.Add(this.label1);

            this.Controls.Add(this.button1);

            this.Name = "Form4";

            this.Text = "Form4";

            this.Deactivate += new System.EventHandler(this.Form4_Deactivate);

            this.Load += new System.EventHandler(this.Form4_Load);

            this.ResumeLayout(false);

            this.PerformLayout();

        }

        #endregion

        private System.Windows.Forms.Button button1;

        private System.Windows.Forms.Label label1;

        private System.Windows.Forms.TextBox textBox1;

    }

}

===From5.cs===

using System;

using System.Windows.Forms;

namespace MultiFormAppDisplay

{

    public partial class Form5 : Form

    {

        public string Data { get; set; }

        public Form5()

        {

            InitializeComponent();

        }

        /// <summary>

        /// This constructor is used to pass data between forms

        /// </summary>

        /// <param name="data"></param>

        public Form5(string data)

        {

            this.Data = data;

            InitializeComponent();

        }

        private void Form5_Load(object sender, EventArgs e)

        {

            this.textBox1.Text = this.Data;

        }

        private void button1_Click(object sender, EventArgs e)

        {

        }

        /// <summary>

        /// showing and passing data back to the property can be further used

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void Form5_Deactivate(object sender, EventArgs e)

        {

            this.Data = this.textBox1.Text ;

        }

    }

}

===From5.designer.cs===

namespace MultiFormAppDisplay

{

    partial class Form5

    {

        /// <summary>

        /// Required designer variable.

        /// </summary>

        private System.ComponentModel.IContainer components = null;

        /// <summary>

        /// Clean up any resources being used.

        /// </summary>

        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>

        protected override void Dispose(bool disposing)

        {

            if (disposing && (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.button1 = new System.Windows.Forms.Button();

            this.label1 = new System.Windows.Forms.Label();

            this.textBox1 = new System.Windows.Forms.TextBox();

            this.SuspendLayout();

            //

            // button1

            //

            this.button1.Location = new System.Drawing.Point(162, 299);

            this.button1.Name = "button1";

            this.button1.Size = new System.Drawing.Size(165, 62);

            this.button1.TabIndex = 1;

            this.button1.Text = "Pass Data to Other Form";

            this.button1.UseVisualStyleBackColor = true;

            this.button1.Click += new System.EventHandler(this.button1_Click);

            //

            // label1

            //

            this.label1.AutoSize = true;

            this.label1.Location = new System.Drawing.Point(158, 123);

            this.label1.Name = "label1";

            this.label1.Size = new System.Drawing.Size(185, 20);

            this.label1.TabIndex = 3;

            this.label1.Text = "Data from Previous Form";

            //

            // textBox1

            //

            this.textBox1.Location = new System.Drawing.Point(162, 209);

            this.textBox1.Name = "textBox1";

            this.textBox1.Size = new System.Drawing.Size(200, 26);

            this.textBox1.TabIndex = 4;

            //

            // Form5

            //

            this.AutoScaleDimensions = new System.Drawing.SizeF(9F, 20F);

            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;

            this.ClientSize = new System.Drawing.Size(800, 450);

            this.Controls.Add(this.textBox1);

            this.Controls.Add(this.label1);

            this.Controls.Add(this.button1);

            this.Name = "Form5";

            this.Text = "Form5";

            this.Deactivate += new System.EventHandler(this.Form5_Deactivate);

            this.Load += new System.EventHandler(this.Form5_Load);

            this.ResumeLayout(false);

            this.PerformLayout();

        }

        #endregion

        private System.Windows.Forms.Button button1;

        private System.Windows.Forms.Label label1;

        private System.Windows.Forms.TextBox textBox1;

    }

}

=========screen shot of the code===

Output:

Passing back to calling form as well:

Lets say you updated data in form5, now close the form:

Same way you can update in other forms as well.

venereology answered 9 months ago
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