/// <summary>
/// http地址文件下载（url路径格式为：http://192.168.1.218:8088/1231_tr/1762062.pdf"}）
/// </summary>
/// <param name="filePath">http文件下载路径</param>
/// <param name="startPath">文件保存路径c:C:\Downloads\ces.pdf</param>
/// <returns></returns>
public string httppdf(string filePath, string startPath)
{
try
{
//FileStream fs = new FileStream(startPath, FileMode.Append, FileAccess.Write, FileShare.ReadWrite);
FileStream fs = null;
// 设置参数
HttpWebRequest request = WebRequest.Create(filePath) as HttpWebRequest;
//发送请求并获取相应回应数据
HttpWebResponse response = request.GetResponse() as HttpWebResponse;
//直到request.GetResponse()程序才开始向目标网页发送Post请求
Stream responseStream = response.GetResponseStream();
//创建本地文件写入流
//Stream stream = new FileStream(tempFile, FileMode.Create);
byte[] bArr = new byte[4096];
int size = responseStream.Read(bArr, 0, (int)bArr.Length);
if (size > 0)
{
fs = new FileStream(startPath, FileMode.Append, FileAccess.Write, FileShare.ReadWrite);
while (size > 0)
{
//stream.Write(bArr, 0, size);
fs.Write(bArr, 0, size);
size = responseStream.Read(bArr, 0, (int)bArr.Length);
}
fs.Close();
}
else
{
LogHelper.WriteLog(GetType(), "HttpDownloads:Return Nothing");
return "";
}
responseStream.Close();
LogHelper.WriteLog(GetType(), "HttpDownloads:下载成功，文件路径为" + startPath);
return startPath;
}
catch (Exception ex)
{
LogHelper.WriteLog(GetType(), "HttpDownloads:" + ex.Message);
return "";
}
}
二、http后缀.jpg文件下载方法
/// <summary>
/// .jpg文件下载至本地（url路径格式为：http://192.168.1.219:8088/system/yanshi.jpg"}）
/// </summary>
/// <param name="filePath">下载路径</param>
/// <param name="startPath">保存路径C:\Downloads\ce.jpg</param>
/// <returns></returns>
public string httpjpg(string filePath, string startPath)
{
LogHelper.WriteLog(GetType(), "httpjpg入参下载路径为：" + filePath + "保存路径为：" + startPath);
string result = string.Empty;
try
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(filePath);
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
using (Stream stream = response.GetResponseStream())
{
using (FileStream fileStream = File.Create(startPath))
{
byte[] buffer = new byte[1024];
int bytesRead = 0;
while ((bytesRead = stream.Read(buffer, 0, buffer.Length)) > 0)
{
fileStream.Write(buffer, 0, bytesRead);
}
}
}
response.Close();
}
catch (Exception ex)
{
LogHelper.WriteLog(GetType(), "httpjpg异常错误为：" + ex.Message);
return "";
}
return startPath;
}
/// <summary>
/// JPG转PDF
/// </summary>
/// <param name="jpgfile">图片路径C:\Downloads\ce.jpg</param>
/// <param name="pdf">生成的PDF路径C:\Downloads\ce.pdf</param>
/// <param name="pageSize">A4，A5</param>
/// <param name="Vertical">True:纵向，False横向</param>
public static void ConvertJPG2PDF(string jpgfile, string pdf, string pageSize, bool Vertical = true)
{
float width = 0, height = 0;
Document document;
#region 根据纸张大小，纵横向，设置画布长宽
if (pageSize.ToUpper() == "A4")
{
if (Vertical)//纵向
{
width = iTextSharp.text.PageSize.A4.Width;
height = iTextSharp.text.PageSize.A4.Height;
}
else//横向
{
width = iTextSharp.text.PageSize.A4.Height;
height = iTextSharp.text.PageSize.A4.Width;
}
}
else if (pageSize.ToUpper() == "A5")
{
if (Vertical)
{
width = iTextSharp.text.PageSize.A5.Width;
height = iTextSharp.text.PageSize.A5.Height;
}
else
{
width = iTextSharp.text.PageSize.A5.Height;
height = iTextSharp.text.PageSize.A5.Width;
}
}
iTextSharp.text.Rectangle pageSizeNew = new iTextSharp.text.Rectangle(width, height);
document = new Document(pageSizeNew);
#endregion
using (var stream = new FileStream(pdf, FileMode.Create, FileAccess.Write, FileShare.None))
{
PdfWriter.GetInstance(document, stream);
document.Open();
using (var imageStream = new FileStream(jpgfile, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
var image = iTextSharp.text.Image.GetInstance(imageStream);
//缩放图像比例
image.ScaleToFit(width, height);
image.SetAbsolutePosition(0, 0);
image.Alignment = iTextSharp.text.Image.ALIGN_MIDDLE;
document.Add(image);
}
document.Close();
}
}
三、http后缀.word文件下载方法
/// <summary>
/// 下载word文件:http://222.128.103.58:21909/system-demo/public/img/ces.docx(也可用httpjpg方法进行下载)
/// </summary>
/// <param name="url">下载文件路径</param>
/// <param name="filePath">下载文件保存路径:C:\Downloads\ces.docx</param>
public void DownloadWordDocument(string url, string filePath)
{
var client = new WebClient();
client.DownloadFile(url, filePath);
}
/// <summary>
/// word转pdf
/// </summary>
/// <param name="sourcePath">word文件路径C:\Downloads\CES.pdf</param>
/// <param name="targetPath">保存pdf文件路径C:\Downloads\ces.pdf</param>
/// <returns></returns>
public static bool WordToPDFWithOffice(string sourcePath, string targetPath)
{
bool result = false;
Microsoft.Office.Interop.Word.Application application = new Microsoft.Office.Interop.Word.Application();
Document document = null;
try
{
application.Visible = false;
document = application.Documents.Open(sourcePath);
/*
参数参考 https://docs.microsoft.com/zh-cn/office/vba/api/visio.document.exportasfixedformat
*/
// document.ExportAsFixedFormat(targetPath, WdExportFormat.wdExportFormatPDF, false, WdExportOptimizeFor.wdExportOptimizeForPrint, WdExportRange.wdExportFromTo);
document.ExportAsFixedFormat(targetPath, WdExportFormat.wdExportFormatPDF, false, WdExportOptimizeFor.wdExportOptimizeForPrint, WdExportRange.wdExportAllDocument);
result = true;
}
catch (Exception e)
{
//Console.WriteLine(e.Message);
result = false;
}
finally
{
document.Close();
}
return result;
}