Csharp/C Sharp by API/System.Windows.Forms/ScrollEventType

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ScrollEventType.LargeDecrement

<source lang="csharp"> using System; using System.Drawing; using System.Collections; using System.ruponentModel; using System.Windows.Forms; using System.Data;

   public class ScrollBars : System.Windows.Forms.Form
   {
       private System.Windows.Forms.TextBox textBox1;
       private System.Windows.Forms.VScrollBar vScrollBar1;
       int counter=0;
       private System.Windows.Forms.Label label1;
       public ScrollBars()
       {
           this.textBox1 = new System.Windows.Forms.TextBox();
           this.vScrollBar1 = new System.Windows.Forms.VScrollBar();
           this.label1 = new System.Windows.Forms.Label();
           this.SuspendLayout();
           this.textBox1.Font = new System.Drawing.Font("Microsoft Sans Serif", 12F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
           this.textBox1.ForeColor = System.Drawing.Color.Transparent;
           this.textBox1.Location = new System.Drawing.Point(24, 56);
           this.textBox1.Multiline = true;
           this.textBox1.Size = new System.Drawing.Size(144, 32);
           this.textBox1.TextAlign = System.Windows.Forms.HorizontalAlignment.Center;
           this.vScrollBar1.Location = new System.Drawing.Point(168, 56);
           this.vScrollBar1.Name = "vScrollBar1";
           this.vScrollBar1.Size = new System.Drawing.Size(16, 32);
           this.vScrollBar1.TabIndex = 7;
           this.vScrollBar1.Scroll += new System.Windows.Forms.ScrollEventHandler(this.vScrollBar1_Scroll);
           this.label1.Location = new System.Drawing.Point(8, 16);
           this.label1.Name = "label1";
           this.label1.Size = new System.Drawing.Size(192, 16);
           this.label1.TabIndex = 6;
           this.label1.Text = "Numeric Scolling using VScroll Bars";
           this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
           this.ClientSize = new System.Drawing.Size(208, 109);
           this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                         this.label1,
                                                                         this.vScrollBar1,
                                                                         this.textBox1});
           this.Text = "Numeric Scroll";
           this.Load += new System.EventHandler(this.ScrollBars_Load);
           this.ResumeLayout(false);
       }
       static void Main() 
       {
           Application.Run(new ScrollBars());
       }
       private void textBox1_TextChanged(object sender, System.EventArgs e)
       {
       }
       private void ScrollBars_Load(object sender, System.EventArgs e)
       {
           vScrollBar1.Maximum = 100;
           vScrollBar1.Minimum = 0 ; 
           vScrollBar1.SmallChange = 1;    
       }
       private void vScrollBar1_Scroll(object sender, System.Windows.Forms.ScrollEventArgs e)
       {
        if ( e.Type == ScrollEventType.Last ) 
           counter = 100  ; 
        else if ( e.Type == ScrollEventType.First) 
           counter = 0  ; 
        else if ( e.Type == ScrollEventType.SmallDecrement ) 
           counter -- ; 
        else if ( e.Type == ScrollEventType.SmallIncrement )
        {
           counter++;
           MessageBox.Show("Small increment");
        }
        else if ( e.Type == ScrollEventType.LargeDecrement ) 
           counter-=5;
        else if ( e.Type == ScrollEventType.LargeIncrement )
        {
           MessageBox.Show("Large increment");
           counter+=5;
        }
        else
           if ( e.Type == ScrollEventType.First ) 
           counter = 0 ; 
        else
           if ( e.Type == ScrollEventType.Last) 
           counter = 100  ; 
       Console.WriteLine(e.NewValue+"\n");
           if ( counter > 100 ) counter = 100 ; 
           if ( counter < 0 ) counter = 0 ;
           textBox1.Text = counter.ToString() ;
       }
   }
  
   
 </source>


ScrollEventType.Last

<source lang="csharp"> using System; using System.Drawing; using System.Collections; using System.ruponentModel; using System.Windows.Forms; using System.Data;

   public class ScrollBars : System.Windows.Forms.Form
   {
       private System.Windows.Forms.TextBox textBox1;
       private System.Windows.Forms.VScrollBar vScrollBar1;
       int counter=0;
       private System.Windows.Forms.Label label1;
       public ScrollBars()
       {
           this.textBox1 = new System.Windows.Forms.TextBox();
           this.vScrollBar1 = new System.Windows.Forms.VScrollBar();
           this.label1 = new System.Windows.Forms.Label();
           this.SuspendLayout();
           this.textBox1.Font = new System.Drawing.Font("Microsoft Sans Serif", 12F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
           this.textBox1.ForeColor = System.Drawing.Color.Transparent;
           this.textBox1.Location = new System.Drawing.Point(24, 56);
           this.textBox1.Multiline = true;
           this.textBox1.Size = new System.Drawing.Size(144, 32);
           this.textBox1.TextAlign = System.Windows.Forms.HorizontalAlignment.Center;
           this.vScrollBar1.Location = new System.Drawing.Point(168, 56);
           this.vScrollBar1.Name = "vScrollBar1";
           this.vScrollBar1.Size = new System.Drawing.Size(16, 32);
           this.vScrollBar1.TabIndex = 7;
           this.vScrollBar1.Scroll += new System.Windows.Forms.ScrollEventHandler(this.vScrollBar1_Scroll);
           this.label1.Location = new System.Drawing.Point(8, 16);
           this.label1.Name = "label1";
           this.label1.Size = new System.Drawing.Size(192, 16);
           this.label1.TabIndex = 6;
           this.label1.Text = "Numeric Scolling using VScroll Bars";
           this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
           this.ClientSize = new System.Drawing.Size(208, 109);
           this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                         this.label1,
                                                                         this.vScrollBar1,
                                                                         this.textBox1});
           this.Text = "Numeric Scroll";
           this.Load += new System.EventHandler(this.ScrollBars_Load);
           this.ResumeLayout(false);
       }
       static void Main() 
       {
           Application.Run(new ScrollBars());
       }
       private void textBox1_TextChanged(object sender, System.EventArgs e)
       {
       }
       private void ScrollBars_Load(object sender, System.EventArgs e)
       {
           vScrollBar1.Maximum = 100;
           vScrollBar1.Minimum = 0 ; 
           vScrollBar1.SmallChange = 1;    
       }
       private void vScrollBar1_Scroll(object sender, System.Windows.Forms.ScrollEventArgs e)
       {
        if ( e.Type == ScrollEventType.Last ) 
           counter = 100  ; 
        else if ( e.Type == ScrollEventType.First) 
           counter = 0  ; 
        else if ( e.Type == ScrollEventType.SmallDecrement ) 
           counter -- ; 
        else if ( e.Type == ScrollEventType.SmallIncrement )
        {
           counter++;
           MessageBox.Show("Small increment");
        }
        else if ( e.Type == ScrollEventType.LargeDecrement ) 
           counter-=5;
        else if ( e.Type == ScrollEventType.LargeIncrement )
        {
           MessageBox.Show("Large increment");
           counter+=5;
        }
        else
           if ( e.Type == ScrollEventType.First ) 
           counter = 0 ; 
        else
           if ( e.Type == ScrollEventType.Last) 
           counter = 100  ; 
       Console.WriteLine(e.NewValue+"\n");
           if ( counter > 100 ) counter = 100 ; 
           if ( counter < 0 ) counter = 0 ;
           textBox1.Text = counter.ToString() ;
       }
   }
  
   
 </source>


ScrollEventType.SmallDecrement

<source lang="csharp"> using System; using System.Drawing; using System.Collections; using System.ruponentModel; using System.Windows.Forms; using System.Data;

   public class ScrollBars : System.Windows.Forms.Form
   {
       private System.Windows.Forms.TextBox textBox1;
       private System.Windows.Forms.VScrollBar vScrollBar1;
       int counter=0;
       private System.Windows.Forms.Label label1;
       public ScrollBars()
       {
           this.textBox1 = new System.Windows.Forms.TextBox();
           this.vScrollBar1 = new System.Windows.Forms.VScrollBar();
           this.label1 = new System.Windows.Forms.Label();
           this.SuspendLayout();
           this.textBox1.Font = new System.Drawing.Font("Microsoft Sans Serif", 12F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
           this.textBox1.ForeColor = System.Drawing.Color.Transparent;
           this.textBox1.Location = new System.Drawing.Point(24, 56);
           this.textBox1.Multiline = true;
           this.textBox1.Size = new System.Drawing.Size(144, 32);
           this.textBox1.TextAlign = System.Windows.Forms.HorizontalAlignment.Center;
           this.vScrollBar1.Location = new System.Drawing.Point(168, 56);
           this.vScrollBar1.Name = "vScrollBar1";
           this.vScrollBar1.Size = new System.Drawing.Size(16, 32);
           this.vScrollBar1.TabIndex = 7;
           this.vScrollBar1.Scroll += new System.Windows.Forms.ScrollEventHandler(this.vScrollBar1_Scroll);
           this.label1.Location = new System.Drawing.Point(8, 16);
           this.label1.Name = "label1";
           this.label1.Size = new System.Drawing.Size(192, 16);
           this.label1.TabIndex = 6;
           this.label1.Text = "Numeric Scolling using VScroll Bars";
           this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
           this.ClientSize = new System.Drawing.Size(208, 109);
           this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                         this.label1,
                                                                         this.vScrollBar1,
                                                                         this.textBox1});
           this.Text = "Numeric Scroll";
           this.Load += new System.EventHandler(this.ScrollBars_Load);
           this.ResumeLayout(false);
       }
       static void Main() 
       {
           Application.Run(new ScrollBars());
       }
       private void textBox1_TextChanged(object sender, System.EventArgs e)
       {
       }
       private void ScrollBars_Load(object sender, System.EventArgs e)
       {
           vScrollBar1.Maximum = 100;
           vScrollBar1.Minimum = 0 ; 
           vScrollBar1.SmallChange = 1;    
       }
       private void vScrollBar1_Scroll(object sender, System.Windows.Forms.ScrollEventArgs e)
       {
        if ( e.Type == ScrollEventType.Last ) 
           counter = 100  ; 
        else if ( e.Type == ScrollEventType.First) 
           counter = 0  ; 
        else if ( e.Type == ScrollEventType.SmallDecrement ) 
           counter -- ; 
        else if ( e.Type == ScrollEventType.SmallIncrement )
        {
           counter++;
           MessageBox.Show("Small increment");
        }
        else if ( e.Type == ScrollEventType.LargeDecrement ) 
           counter-=5;
        else if ( e.Type == ScrollEventType.LargeIncrement )
        {
           MessageBox.Show("Large increment");
           counter+=5;
        }
        else
           if ( e.Type == ScrollEventType.First ) 
           counter = 0 ; 
        else
           if ( e.Type == ScrollEventType.Last) 
           counter = 100  ; 
       Console.WriteLine(e.NewValue+"\n");
           if ( counter > 100 ) counter = 100 ; 
           if ( counter < 0 ) counter = 0 ;
           textBox1.Text = counter.ToString() ;
       }
   }
  
   
 </source>