/**//// <summary>
/// 按比例縮小圖片,自動計算寬度
/// </summary>
/// <param name="strOldPic">源圖文件名(包括路徑)</param>
/// <param name="strNewPic">縮小後保存爲文件名(包括路徑)</param>
/// <param name="intHeight">縮小至高度</param>
public void SmallPicWidth(string strOldPic, string strNewPic, int intHeight)
{
System.Drawing.Bitmap objPic, objNewPic;
try
{
objPic = new System.Drawing.Bitmap(strOldPic);
int intWidth = (intHeight / objPic.Height) * objPic.Width;
objNewPic = new System.Drawing.Bitmap(objPic, intWidth, intHeight);
objNewPic.Save(strNewPic);
}
catch (Exception exp) { throw exp; }
finally
{
objPic = null;
objNewPic = null;
}
}
/**//// <summary>
/// 縮小圖片
/// </summary>
/// <param name="strOldPic">源圖文件名(包括路徑)</param>
/// <param name="strNewPic">縮小後保存爲文件名(包括路徑)</param>
/// <param name="intWidth">縮小至寬度</param>
/// <param name="intHeight">縮小至高度</param>
public void SmallPic(string strOldPic, string strNewPic, int intWidth, int intHeight)
{
System.Drawing.Bitmap objPic, objNewPic;
try
{
objPic = new System.Drawing.Bitmap(strOldPic);
objNewPic = new System.Drawing.Bitmap(objPic, intWidth, intHeight);
objNewPic.Save(strNewPic);
}
catch (Exception exp)
{ throw exp; }
finally
{
objPic = null;
objNewPic = null;
}
}
.Net中上傳圖片按比例自動縮小或放大
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