Background Image on Form經(jīng)驗(yàn)二則

2010-08-28 10:49:44來源:西部e網(wǎng)作者:

gotdotnet網(wǎng)站上有個(gè)Pocket PC的例子程序,就是Background Image on Form,地址為:
http://samples.gotdotnet.com/quickstart/CompactFramework/doc/bkgndimage.aspx
因?yàn)槭堑谝淮巫鲞@樣的程序,摸索了好久發(fā)現(xiàn)了兩個(gè)關(guān)鍵的地方,放上來與大家分享一下。轉(zhuǎn)載的朋友請注明來源于西部e網(wǎng),AD一下,網(wǎng)址為weste.net。下面我們就共同來學(xué)習(xí)一下吧!

代碼都已經(jīng)是現(xiàn)成的了:

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

namespace BkgndImage
{
    /// <summary>
    /// Summary description for Form1.
    /// </summary>
    public class Form1 : System.Windows.Forms.Form
    {
        private System.Windows.Forms.Button button1;
        private System.Windows.Forms.MainMenu mainMenu1;

        private Image backgroundImage;

 

        public Form1()
        {
            //
            // Required for Windows Form Designer support
            //

            backgroundImage = new Bitmap(Assembly.GetExecutingAssembly().GetManifestResourceStream("BkgndImage.MyBkgnd.jpg"));           

            InitializeComponent();

            //
            // TODO: Add any constructor code after InitializeComponent call
            //
        }
        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        protected override void Dispose( bool disposing )
        {
            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.mainMenu1 = new System.Windows.Forms.MainMenu();
            this.button1 = new System.Windows.Forms.Button();
            //
            // button1
            //
            this.button1.Location = new System.Drawing.Point(144, 184);
            this.button1.Size = new System.Drawing.Size(64, 24);
            this.button1.Text = "button1";
            //
            // Form1
            //
            this.Controls.Add(this.button1);
            this.Menu = this.mainMenu1;
            this.Text = "Form1";


        }
        #endregion

        /// <summary>
        /// The main entry point for the application.
        /// </summary>

        static void Main()
        {
            Application.Run(new Form1());
        }
        //Draws the image to fit the ClientRectangle area of the form.
        protected override void OnPaint(PaintEventArgs e)
        {
            e.Graphics.DrawImage(backgroundImage, this.ClientRectangle, new Rectangle(0, 0, this.backgroundImage.Width, this.backgroundImage.Height), GraphicsUnit.Pixel);
        }
   
    }
}

關(guān)鍵的地方已經(jīng)設(shè)成粗字體了。

代碼是正確的,可以直接使用,但是這里面有兩個(gè)地方需要注意:

1、GetManifestResourceStream方法

從此程序集加載指定清單資源,清單資源的范圍由指定類型的命名空間確定。如果你的圖片文件名為 MyBkgnd.jpg,那么你需要寫成 BkgndImage.MyBkgnd.jpg 才能夠搜索到資源。

還有一種寫法更好:

Assembly asm = Assembly.GetExecutingAssembly();
backgroundImage = new Bitmap(asm.GetManifestResourceStream(asm.GetName().Name+ ".MyBkgnd.jpg"));

這樣就不用考慮命名空間的問題了。

2、如果你發(fā)現(xiàn)即使文件名寫正確了,但是出現(xiàn)
未處理的“System.ArgumentException”類型的異常出現(xiàn)在 system.drawing.dll 中
這種錯(cuò)誤,就說明還是沒有找到資源文件,這個(gè)時(shí)候就是我要說的第二個(gè)技巧了,其實(shí)路徑是對(duì)的,但是要加載的圖片的確沒有找到。

方法是:在項(xiàng)目中找到圖片,屬性-生成操作(選擇“嵌入的資源”)

重新編譯部署,呵呵,看看效果就出來了吧!

關(guān)鍵詞:dotnet

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