hi, friends...
here iam working with ContentPage of asp.net...i have to upload image file....
so,iam trying with the below code:....in which i have
filUpload(HTML input(file))Control and a webControl button named
btnUpload and an image webControl named
imgPicture in which iam getting the image in thumbnail form and storing this image and thumbnail in my app folder named
images
...all working fine when iam using normal webform/page not ContentPage..i have search the web ..i got answer that i have to add to <@Page of ContentPage
EnableEventValidation="true" and add the following code in aspx.cs of ContentPage....
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protected override void Render(HtmlTextWriter writer)
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{
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base.Render(writer);
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this.Page.ClientScript.RegisterForEventValidation(btnUpload.ID);
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}
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but still iam not getting any value in filUpload Control ...i.e., (filUpload.PostedFile=null)
Here is my full code of MasterPage,ContentPage.aspx (Default.aspx)and ContentPage.aspx.cs(Default.aspx.cs)
MastePage::
Here is Default.aspx(ContentPage)
Code of Default.aspx.cs(ContentPage):
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using System;
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using System.Data;
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using System.Configuration;
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using System.Collections;
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using System.Web;
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using System.Web.Security;
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using System.Web.UI;
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using System.Web.UI.WebControls;
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using System.Web.UI.WebControls.WebParts;
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using System.Web.UI.HtmlControls;
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using System.Data.SqlClient;
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using System.Drawing;
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public partial class Default3 : System.Web.UI.Page
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{
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protected void Page_Load(object sender, EventArgs e)
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{
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}
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protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
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{
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}
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protected override void Render(HtmlTextWriter writer)
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{
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base.Render(writer);
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this.Page.ClientScript.RegisterForEventValidation(btnUpload.ID);
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}
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protected void btnUpload_Click(object sender, System.EventArgs e)
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{
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// Initialize variables
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string sSavePath;
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string sThumbExtension;
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int intThumbWidth;
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int intThumbHeight;
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// Set constant values
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sSavePath = "images/";
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sThumbExtension = "_thumb";
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intThumbWidth = 160;
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intThumbHeight = 120;
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// If file field isn’t empty
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if (filUpload.PostedFile != null) .....//here iam not getting value in filUpload Control//.....
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{
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// Check file size (mustn’t be 0)
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HttpPostedFile myFile = filUpload.PostedFile;
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int nFileLen = myFile.ContentLength;
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if (nFileLen == 0)
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{
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lblOutput.Text = "No file was uploaded.";
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return;
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}
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// Check file extension (must be JPG)
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if (System.IO.Path.GetExtension(myFile.FileName).ToLower() != ".jpg")
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{
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lblOutput.Text = "The file must have an extension of JPG";
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return;
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}
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// Read file into a data stream
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byte[] myData = new Byte[nFileLen];
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myFile.InputStream.Read(myData,0,nFileLen);
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// Make sure a duplicate file doesn’t exist. If it does, keep on appending an
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// incremental numeric until it is unique
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string sFilename = System.IO.Path.GetFileName(myFile.FileName);
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int file_append = 0;
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while (System.IO.File.Exists(Server.MapPath(sSavePath + sFilename)))
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{
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file_append++;
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sFilename = System.IO.Path.GetFileNameWithoutExtension(myFile.FileName)
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+ file_append.ToString() + ".jpg";
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}
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// Save the stream to disk
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System.IO.FileStream newFile
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= new System.IO.FileStream(Server.MapPath(sSavePath + sFilename),
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System.IO.FileMode.Create);
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newFile.Write(myData,0, myData.Length);
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newFile.Close();
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// Check whether the file is really a JPEG by opening it
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System.Drawing.Image.GetThumbnailImageAbort myCallBack =
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new System.Drawing.Image.GetThumbnailImageAbort(ThumbnailCallback);
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Bitmap myBitmap;
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try
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{
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myBitmap = new Bitmap(Server.MapPath(sSavePath + sFilename));
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// If jpg file is a jpeg, create a thumbnail filename that is unique.
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file_append = 0;
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string sThumbFile = System.IO.Path.GetFileNameWithoutExtension(myFile.FileName)
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+ sThumbExtension + ".jpg";
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while (System.IO.File.Exists(Server.MapPath(sSavePath + sThumbFile)))
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{
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file_append++;
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sThumbFile = System.IO.Path.GetFileNameWithoutExtension(myFile.FileName) +
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file_append.ToString() + sThumbExtension + ".jpg";
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}
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// Save thumbnail and output it onto the webpage
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System.Drawing.Image myThumbnail
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= myBitmap.GetThumbnailImage(intThumbWidth,
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intThumbHeight, myCallBack, IntPtr.Zero);
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myThumbnail.Save (Server.MapPath(sSavePath + sThumbFile));
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imgPicture.ImageUrl = sSavePath + sThumbFile;
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// Displaying success information
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lblOutput.Text = "File uploaded successfully!";
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// Destroy objects
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myThumbnail.Dispose();
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myBitmap.Dispose();
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}
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catch (ArgumentException errArgument)
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{
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// The file wasn't a valid jpg file
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lblOutput.Text = "The file wasn't a valid jpg file.";
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System.IO.File.Delete(Server.MapPath(sSavePath + sFilename));
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}
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}
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}
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public bool ThumbnailCallback()
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{
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return false;
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}
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}
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