控制图片按比例显示[FREETEXTBOX]（2）

最新推荐文章于 2017-11-10 13:30:00 发布

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本文介绍了一种在FREETEXTBOX中实现图片上传的方法，并详细展示了如何处理上传的图片，包括调整图片尺寸、获取图片尺寸信息等。此外还提供了一个用于返回图片路径及其尺寸的JavaScript函数。

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此方法用于在FREETEXTBOX中的上传图片：（参照上传图片）

if (UploadFile.PostedFile.FileName.Trim() != "")
{
if (IsValidFileType(UploadFile.PostedFile.FileName))
{
try
{
string UploadFileName = "";
string UploadFileDestination = "";
string filename= "";
int ppp = 0;

filename=(DateTime.Now.ToString()).Replace(":","");
filename= filename.Replace(" ","");
filename= filename.Replace("-","");

UploadFileName = UploadFile.PostedFile.FileName;
ppp=UploadFileName.LastIndexOf(".");
UploadFileName=UploadFileName.Substring(ppp,UploadFileName.Length-ppp);
filename = filename+UploadFileName;


UploadFileDestination = HttpContext.Current.Request.PhysicalApplicationPath;
UploadFileDestination += CurrentImagesFolder.Value;
UploadFileDestination += "//";
UploadFile.PostedFile.SaveAs(UploadFileDestination + filename);

string urrl = Server.MapPath("../images/") + filename;
double width=0;
double height=0;
System.Drawing.Bitmap imgObj = new Bitmap(urrl);
width=imgObj.Width;
height=imgObj.Height;

double k;//金儒 2005.5.11
if ((width != 0) && (height != 0))
{
k=Convert.ToDouble( width/height);

if(k>=1)
{
if (width>=750)
{
width=750;
height=width/k;
}
}
else
{
if (height>=750)
{
height=750;
width=k*height;
}
}
}

string imgurl = @"../AspNetForums/images/" + filename;
this.iw.Value = width.ToString();
this.ih.Value = height.ToString();
this.ip.Value = imgurl;
ResultsMessage.Text = UploadSuccessMessage;
}
catch
{
ResultsMessage.Text = UploadFailureMessage;
}
}
else
{
ResultsMessage.Text = InvalidFileTypeMessage;
}
}

其中的width ,height 用于返回值，用来在编辑框里显示大小。

function returnImage(imagename,width,height) { var imgAr = new Array(); imgAr["filename"] = imagename; imgAr["width"] = width; imgAr["height"] = height; window.parent.returnValue = imgAr; window.parent.close(); }

（首先width ,height分别付给this.form.elements['ip'].value,this.form.elements['iw'].value,this.form.elements['ih'].value 然后“确定”传到接收的页面）