InputFile.PostedFile.ContentLength测量单位

时间:2010-09-13 06:05:12

标签: asp.net vb.net file-upload filesize maxstringcontentlength

请告诉我InputFile.PostedFile.ContentLength测量的单位。我需要确保文件小于500k。

感谢。

3 个答案:

答案 0 :(得分:11)

测量单位=字节。

1 Kilobyte (kB) = 2ˆ10 Byte = 1024 Bytes

文件大小为15 KB的示例代码测试:

const int maxFileLength = 15360; // 15KB = 1024 * 15

if(PictureFile.PostedFile.ContentLength > maxFileLength)
{

    MyResult.Text = String.Format("Your post has a size of {0:#,##0} bytes which
    exceeded the limit of {0:#,##0} bytes. Please upload a smaller file.",
    PictureFile.ContentLength, maxFileLength);
}
else
{
    // Save the file here
    MyResult.Text = "Thank you for posting."
}

在您的情况下,您希望文件小于500 KB,您应该这样:

const int maxFileLength = 512000; // 500KB = 500 * 1024

答案 1 :(得分:2)

这是字节。

http://msdn.microsoft.com/en-us/library/system.web.httppostedfile.contentlength.aspx

  

<强> HttpPostedFile.ContentLength

     

获取上传文件的大小(以字节为单位)。

答案 2 :(得分:-1)

Image

当我上传一个超过1 mb的模板文件时,它的geting加载了很长时间。我的代码如下----

if (checkImagecount())
{
    //string imgFolder = Server.MapPath("/Userimages/" + emp_id.ToString().Trim() + "/Images/Browseimage/");
    string destinationImage = Server.MapPath("/master/" + emp_id.ToString().Trim() + "/Images/");
    string destination1 = Server.MapPath("/master/" + emp_id.ToString().Trim() + "/Images/");
    string imgFilename, fileExt = String.Empty;
    Response.Write(fileTemplateimage.PostedFile.ContentLength+"<br/>");
    Response.Write(fileTemplateimage.FileBytes.Length);
    Response.End();    
    if (fileTemplateimage.PostedFile.ContentLength > 0 && fileTemplateimage.FileBytes.Length <= 1048576)
    {

        System.Drawing.Image uploadImage = System.Drawing.Image.FromStream(fileTemplateimage.PostedFile.InputStream);
        float uploadImagewidth = uploadImage.PhysicalDimension.Width;
        float uploadImageheight = uploadImage.PhysicalDimension.Height;
else
    {

        Page.ClientScript.RegisterStartupScript(this.GetType(), "failure", "alert('अपलोड फ़ाइल आकार 1 एमबी से अधिक नहीं होना चाहिए.');", true);
        divhide.Style.Add("display", "block");
        divUploadpanel.Style.Add("display", "block");
        fileTemplateimage.Focus();