protected void upload_Click(object sender, EventArgs e)
{
if (Upload.Value !="")
{
System.IO.Stream fs = Upload.PostedFile.InputStream;
img_uploadStream = Upload.PostedFile.InputStream;
System.IO.BinaryReader br = new System.IO.BinaryReader(fs);
Byte[] bytes = CreateThumbnail(br.ReadBytes((Int32)fs.Length),150);
string base64String = Convert.ToBase64String(bytes, 0, bytes.Length);
imageField.Src = String.Format("data:{0};base64,{1}", "image/jpeg", base64String);
}
}
After upload the image , Upload.PostedFile.InputStream has set to null value . I want to save this Input Stream to asp.net View State to reuse .
You can use this code
public Byte[] YourImage
{
get
{
if(ViewState["Key"] != null)
{
return (Byte[]) ViewState["Key"];
}
return null;
}
set
{
ViewState["Key"] = value;
}
}
Set ViewState inside upload_Click:
ViewState["ImageStream"]=Upload.PostedFile.InputStream;
Then you can get your viewstate anywhere within the page where you want to use:
System.IO.Stream fstream=(System.IO.Stream)ViewState["ImageStream"];
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