{
Image result=new Bitmap(original.Width,original.Height+height)
using(Graphics graphics=Graphics.FromImage(result))
{
graphics.DrawImage(original,0,0)
Rectangle rect=new Rectangle(0,original.Height,original.Width,height)
using(SolidBrush brush=new SolidBrush(color))
{
using(StringFormat format=new StringFormat())
{
format.Alignment=StringAlignment.Near
format.LineAlignment=StringAlignment.Center
graphics.DrawString(text,font,brush,rect,format)
}
}
}
return result
}
using System.Drawingusing System.Drawing.Drawing2D
using System.Drawing.Imaging
public class ImageHelper
{
/// <summary><SUMMARY></SUMMARY>
/// 获取图片中的各帧
/// </summary>
/// <param name="pPath"><PARAM name="pPath" />图片路径</param>
/// <param name="pSavePath"><PARAM name="pSavePath" />保存路径</param>
public void GetFrames(string pPath, string pSavedPath)
{
Image gif = Image.FromFile(pPath)
FrameDimension fd = new FrameDimension(gif.FrameDimensionsList[0])
//获取帧数(gif图片可能包含多帧，其它格式图片一般仅一帧)
int count = gif.GetFrameCount(fd)
//以Jpeg格式保存各帧
for (int i = 0i <counti++)
{
gif.SelectActiveFrame(fd, i)
gif.Save(pSavedPath + "\\frame_" + i + ".jpg", ImageFormat.Jpeg)
}
}
/// <summary><SUMMARY></SUMMARY>
/// 获取图片缩略图
/// </summary>
/// <param name="pPath"><PARAM name="pPath" />图片路径</param>
/// <param name="pSavePath"><PARAM name="pSavePath" />保存路径</param>
/// <param name="pWidth"><PARAM name="pWidth" />缩略图宽度</param>
/// <param name="pHeight"><PARAM name="pHeight" />缩略图高度</param>
/// <param name="pFormat"><PARAM name="pFormat" />保存格式，通常可以是jpeg</param>
public void GetSmaller(string pPath, string pSavedPath, int pWidth, int pHeight)
{
try
{
Image smallerImg
Image originalImg = Image.FromFile(pPath)
Image.GetThumbnailImageAbort callback = new Image.GetThumbnailImageAbort(ThumbnailCallback)
smallerImg = originalImg.GetThumbnailImage(pWidth, pHeight, callback, IntPtr.Zero)
smallerImg.Save(pSavedPath + "\\smaller.jpg", ImageFormat.Jpeg)
}
catch (Exception x)
{
//
}
}
/// <summary><SUMMARY></SUMMARY>
/// 获取图片指定部分
/// </summary>
/// <param name="pPath"><PARAM name="pPath" />图片路径</param>
/// <param name="pSavePath"><PARAM name="pSavePath" />保存路径</param>
/// <param name="pPartStartPointX"><PARAM name="pPartStartPointX" />目标图片开始绘制处的坐标X值(通常为)</param>
/// <param name="pPartStartPointY"><PARAM name="pPartStartPointY" />目标图片开始绘制处的坐标Y值(通常为)</param>
/// <param name="pPartWidth"><PARAM name="pPartWidth" />目标图片的宽度</param>
/// <param name="pPartHeight"><PARAM name="pPartHeight" />目标图片的高度</param>
/// <param name="pOrigStartPointX"><PARAM name="pOrigStartPointX" />原始图片开始截取处的坐标X值</param>
/// <param name="pOrigStartPointY"><PARAM name="pOrigStartPointY" />原始图片开始截取处的坐标Y值</param>
/// <param name="pFormat"><PARAM name="pFormat" />保存格式，通常可以是jpeg</param>
public void GetPart(string pPath, string pSavedPath, int pPartStartPointX, int pPartStartPointY, int pPartWidth, int pPartHeight, int pOrigStartPointX, int pOrigStartPointY)
{
Image originalImg = Image.FromFile(pPath)
Bitmap partImg = new Bitmap(pPartWidth, pPartHeight)
Graphics graphics = Graphics.FromImage(partImg)
Rectangle destRect = new Rectangle(new Point(pPartStartPointX, pPartStartPointY), new Size(pPartWidth, pPartHeight))//目标位置
Rectangle origRect = new Rectangle(new Point(pOrigStartPointX, pOrigStartPointY), new Size(pPartWidth, pPartHeight))//原图位置（默认从原图中截取的图片大小等于目标图片的大小）
graphics.DrawImage(originalImg, destRect, origRect, GraphicsUnit.Pixel)
partImg.Save(pSavedPath + "\\part.jpg", ImageFormat.Jpeg)
}
public bool ThumbnailCallback()
{
return false
}
}
希望对你有所帮助
try{
string filepath = uploadFile.Value//上传图片的路径
string newName = DateTime.Now.ToString("yyyyMMddHHmmss")//图片新名字
string filehz = filepath.Substring(filepath.LastIndexOf(".") + 1).ToLowerInvariant()//后缀名
string uploadpath = Server.MapPath("./images/update/" + newName + "." + filehz)//服务器保存图片路径
if (!(uploadFile.PostedFile.ContentLength >0))
{
lblErrInfo.Text = "没有选择文件"
}
else
{
if (filehz == "jpg" || filehz == "gif" || filehz == "png")
{
if (File.Exists(uploadpath))
{
lblErrInfo.Text = "已经有同名文件"
}
else
{
if (chboxIsInfo.Checked == true)//加版权信息
{
if (txtLeft.Text.Trim() == "" || txtRight.Text.Trim() == "" || txtAddInfo.Text.Trim() == "")
{
Response.Write("<script>alert('请输入信息位置(半角数字)和信息文本！')</script>")
}
else
{
uploadFile.PostedFile.SaveAs(uploadpath)
lbtnDelImage.Visible = true
btnUpdate.Enabled = false
uploadFile.Visible = false
txtGameImage.Text = "images/update/" + newName + "." + filehz
System.Threading.Thread.Sleep(1000)
System.Drawing.Image img = System.Drawing.Image.FromFile(uploadpath)
lblImgWidth.Text = img.Width.ToString()
lblImgHeight.Text = img.Height.ToString()
int width, height, left, right
width = Int32.Parse(lblImgWidth.Text)
height = Int32.Parse(lblImgHeight.Text)
left = Int32.Parse(txtLeft.Text.Trim())
right = Int32.Parse(txtRight.Text.Trim())
System.Threading.Thread.Sleep(1000)
//添加信息
string file = Server.MapPath("./" + txtGameImage.Text)
string newfile = "images/update/" + DateTime.Now.ToString("yyyyMMddHHmmss") + ".jpg"
string strAddInfo = txtAddInfo.Text
System.Drawing.Image oldimage = System.Drawing.Image.FromFile(file)
Response.Clear()
Bitmap output = new Bitmap(oldimage)
Graphics gh = Graphics.FromImage(output)
string ColorHex = SelColor.Value
int r = Int16.Parse(ColorHex.Substring(0, 2), System.Globalization.NumberStyles.AllowHexSpecifier)
int g = Int16.Parse(ColorHex.Substring(2, 2), System.Globalization.NumberStyles.AllowHexSpecifier)
int b = Int16.Parse(ColorHex.Substring(4, 2), System.Globalization.NumberStyles.AllowHexSpecifier)
Color NewColor = Color.FromArgb(r, g, b)
gh.DrawString(strAddInfo, new Font(ddlFont.SelectedValue, int.Parse(ddlFontSize.SelectedValue)), new SolidBrush(NewColor), left, right)
output.Save(Server.MapPath(newfile), System.Drawing.Imaging.ImageFormat.Jpeg)
Response.ContentType = "image/gif"
ImgPreview.ImageUrl = newfile
ImgPreview.Visible = true
oldimage.Dispose()
txtGameImage.Text = newfile
img.Dispose()
File.Delete(file)
}
}
else//不加版权信息
{
uploadFile.PostedFile.SaveAs(uploadpath)
lbtnDelImage.Visible = true
btnUpdate.Enabled = false
uploadFile.Visible = false
txtGameImage.Text = "images/update/" + newName + "." + filehz
System.Threading.Thread.Sleep(1000)
System.Drawing.Image img = System.Drawing.Image.FromFile(uploadpath)
lblImgWidth.Text = img.Width.ToString()
lblImgHeight.Text = img.Height.ToString()
Response.ContentType = "image/gif"
ImgPreview.ImageUrl = txtGameImage.Text
ImgPreview.Visible = true
img.Dispose()
}
SizeToSize()
}
}
else
{
Response.Write("<script>alert('只能上传jpg|gif|png格式的图片！')</script>")
}
}
}
catch
{
Response.Write("<script>alert('上传图片出错！')</script>")
}
以前写的上传代码
left, right分别代表版权信息的X，Y轴，这里是自己输入的，你可以通过对你输入的版权信息的字符像素长度和图片的宽，高计算得到。
ddlFont.SelectedValue 字体选择
int.Parse(ddlFontSize.SelectedValue)) 字体大小
new SolidBrush(NewColor) 字体颜色
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