Panel.AutoScrollPosition : Panel « System.Windows.Forms « C# / C Sharp by API

1. C# / C Sharp by API
2. System.Windows.Forms
3. Panel

Panel.AutoScrollPosition

 

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

public class Form1 : Form {
    public Form1() {
        this.panel1 = new System.Windows.Forms.Panel();
        this.SuspendLayout();
        this.panel1.AutoScroll = true;
        this.panel1.BackgroundImage = new Bitmap("yourfile.bmp");
        this.panel1.Location = new System.Drawing.Point(13, 13);
        this.panel1.Size = new System.Drawing.Size(267, 243);
        this.AutoScaleDimensions = new System.Drawing.SizeF(8F, 16F);
        this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
        this.ClientSize = new System.Drawing.Size(292, 268);
        this.Controls.Add(this.panel1);
        this.Load += new System.EventHandler(this.Form1_Load);
        this.ResumeLayout(false);        this.panel1.AutoScrollMinSize = this.panel1.BackgroundImage.Size;
    }

    private void Form1_Load(object sender, EventArgs e) {
        int midX = this.panel1.AutoScrollMinSize.Width / 2;
        int midY = this.panel1.AutoScrollMinSize.Height / 2;
        int halfSizeX = this.panel1.Size.Width / 2;
        int halfSizeY = this.panel1.Size.Height / 2;
        int startPosX = midX - halfSizeX;
        if (startPosX < 0) startPosX = 0;
        int startPosY = midY - halfSizeY;
        if (startPosY < 0) startPosY = 0;

        this.panel1.AutoScrollPosition = new Point(startPosX, startPosY);
    }
    private System.Windows.Forms.Panel panel1;
    [STAThread]
    static void Main() {
        Application.EnableVisualStyles();
        Application.Run(new Form1());
    }
}

   
  

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