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有了這些東西,組件就可以在web下使用了,但是既然是水印,就應(yīng)該有原始圖片,和水印圖片,及一些其他的參數(shù),這里我們就用公共函數(shù),至于web怎么把值傳進去,我們到下面再說

#region 公共屬性

//顯示寬度
public int ImgWidht
{
get {return _ImgWidth;}
set {_ImgWidth = value;}
}

//顯示高度
public int ImgHeight
{
get {return _ImgHeight;}
set {_ImgHeight = value;}
}

//透明度
private int Alpha
{
get {return _Alpha;}
set {_Alpha = value;}
}

//主圖片地址
public string ZPicture
{
get {return _ZPicture;}
set {_ZPicture = value;}
}

//水印圖片地址
public string FPicture
{
get {return _FPicture;}
set {_FPicture = value;}
}

#endregion

下面把完整的代碼貢獻給大家：

代碼拷貝框
using System; using System.Collections; using System.ComponentModel; using System.Drawing; using System.Data; using System.Windows.Forms; using System.IO; using System.Net; namespace EditImagePint { /// <summary> /// UserControl1 的摘要說明。 /// </summary> public class ImagePint : System.Windows.Forms.UserControl { /// <summary> /// 必需的設(shè)計器變量。 /// </summary> private System.ComponentModel.Container components = null; public ImagePint() { // 該調(diào)用是 Windows.Forms 窗體設(shè)計器所必需的。 InitializeComponent(); // TODO: 在 InitComponent 調(diào)用后添加任何初始化 } /// <summary> /// 清理所有正在使用的資源。 /// </summary> protected override void Dispose( bool disposing ) { if( disposing ) { if( components != null ) components.Dispose(); } base.Dispose( disposing ); } #region 組件設(shè)計器生成的代碼 /// <summary> /// 設(shè)計器支持所需的方法 - 不要使用代碼編輯器 /// 修改此方法的內(nèi)容。 /// </summary> private void InitializeComponent() { this.pictureBox1 = new System.Windows.Forms.PictureBox(); this.SuspendLayout(); // // pictureBox1 // this.pictureBox1.Location = new System.Drawing.Point(0, 0); this.pictureBox1.Name = "pictureBox1"; this.pictureBox1.TabIndex = 0; this.pictureBox1.TabStop = false; // // ImagePint // this.Controls.Add(this.pictureBox1); this.Name = "ImagePint"; this.Load += new System.EventHandler(this.ImagePint_Load); this.ResumeLayout(false); } #endregion private Bitmap sImage; private int sWidth; private int sHeight; private int _ImgWidth; private System.Windows.Forms.PictureBox pictureBox1; private int _ImgHeight; private int _Alpha; private string _ZPicture = String.Empty; private string _FPicture = String.Empty; #region 公共屬性 //顯示寬度 public int ImgWidht { get {return _ImgWidth;} set {_ImgWidth = value;} } //顯示高度 public int ImgHeight { get {return _ImgHeight;} set {_ImgHeight = value;} } //透明度 private int Alpha { get {return _Alpha;} set {_Alpha = value;} } //主圖片地址 public string ZPicture { get {return _ZPicture;} set {_ZPicture = value;} } //水印圖片地址 public string FPicture { get {return _FPicture;} set {_FPicture = value;} } #endregion private void ImagePint_Load(object sender, System.EventArgs e) { string sourceFile = _ZPicture; string waterMarkFile = _FPicture; //string sourceFile = @"http://localhost/Image/my.jpg"; //string waterMarkFile = @"http://localhost/Image/make.jpg"; sImage = tmpImage(sourceFile); //sImage.Width = _ImgWidth==0?sImage.Width:_ImgWidth; //sImage.Height = _ImgHeight==0?sImage.Height:_ImgHeight; sWidth = _ImgWidth==0?sImage.Width:_ImgWidth; sHeight = _ImgHeight==0?sImage.Height:_ImgHeight; this.Width = sWidth; this.Height = sHeight; pictureBox1.Width = sWidth; pictureBox1.Height = sHeight; this.MakeWaterImage(waterMarkFile); } public Bitmap tmpImage(string strUrl) { Bitmap bitmap; if(strUrl.IndexOf("http")<0) { bitmap = new Bitmap(strUrl); return bitmap; } else { WebClient webClient = new WebClient(); Stream data = webClient.OpenRead(strUrl); bitmap = new Bitmap(data); return bitmap; } } //方法作用:生成水印圖片 //sourceFile:要生成水印的圖片文件 //WaterMarkFile:存放水印的圖片文件 public void MakeWaterImage(string waterMarkFile) { try { //水印圖 Bitmap wImage = tmpImage(waterMarkFile); int wWidth = wImage.Width; int wHeight = wImage.Height; //make Graphics. Graphics g = Graphics.FromImage(sImage); int x; //臨時變量 int y; //監(jiān)時變量 int x1; //原圖和水印圖的寬度差 int y1; //原圖和水印圖的高度差 int w; //生成的水印圖的寬度 int h; //生成的水印圖的高度 int al; //alpha int rl; //Red int gl; //Green int bl; //Blue if(sWidth > wWidth) { x1 = sWidth - wWidth; y1 = sHeight - wHeight; w = wWidth; h = wHeight; } else { x1 = 0; y1 = 0; w = sWidth; h = sHeight; } //開始繪圖 for(x = 1; x < w; x++) { for(y = 1; y < h; y++) { al = wImage.GetPixel(x,y).A; rl = wImage.GetPixel(x,y).R; gl = wImage.GetPixel(x,y).G; bl = wImage.GetPixel(x,y).B; al = _Alpha==0?30:_Alpha; if(rl + 25 < 255) rl += 25; if(gl + 25 < 255) gl += 25; if(bl + 25 < 255) bl += 25; g.DrawEllipse(new Pen(new SolidBrush(Color.FromArgb(al,rl,gl,bl))),x1+x,y1+y,1,1); } } g.Save(); pictureBox1.Image = sImage; } catch(Exception ex) { MessageBox.Show(ex.Message); } } } }
[Ctrl+A 全部選擇 然后拷貝]

然后我們把這個控件生成一個Release版本，然后把生成的dll文件copy到你的虛擬目錄下，然后就是web調(diào)用了，我們先建立一個虛擬目錄，比如說我們建立的虛擬目錄及地址為：
localhost/Object/ImagePrint/
我們就把生成的 EditImagePint.dll 文件copy到這個目錄下
并建立一個html文件，把以下的代碼放進去：

<object id="print" classid="http://localhost/Object/ImagePrint/
EditImagePint.dll#EditImagePint.ImagePint"
Width="177" Height="144" VIEWASTEXT >
<param name="ImgWidht" value="177">
<param name="ImgHeight" value="144">
<param name="Alpha" value="40">
<param name="ZPicture" value="http://localhost/Object/ImagePrint/my.jpg">
<param name="FPicture" value="http://localhost/Object/ImagePrint/make.jpg">
</object>

看到了把，這些param就是我們的公共屬性了：），這樣就把值傳遞進去了

最終顯示如下：

對不起大家，目前還不支持GIF

源碼下載：點擊下載

切記HTML里面的object的classid需要根據(jù)你的虛擬目錄變化

經(jīng)典論壇討論帖：
http://www.95time.cn/bbs/newsdetail.asp?id=2553689

出處：藍色理想
責任編輯：moby

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