Web Application - How to Upload Multiple Images at a Time

//First add image control into the web form how many you want to upload images at a time

//Add one button
//Write the below code into the button_click event
 

if (FileUpload1.HasFile)

{
string
imagefile = FileUpload1.FileName; 
if
(CheckFileType(imagefile) == true)
{

Random rndob = new Random();

int
db = rndob.Next(1, 100);
filename = System.IO.Path.GetFileNameWithoutExtension(imagefile) + db.ToString() + System.IO.Path.GetExtension(imagefile);
 

String FilePath = "images/" + filename;

FileUpload1.SaveAs(Server.MapPath(FilePath));
objimg.ImageName = filename;

Image1();
 
if
(Session["imagecount"].ToString() == "1")
{

Img1.ImageUrl = FilePath;

ViewState["img1"] = FilePath;

}

else
if (Session["imagecount"].ToString() == "2")
{

Img1.ImageUrl = ViewState["img1"].ToString();

Img2.ImageUrl = FilePath;

ViewState["img2"] = FilePath;

}

else
if (Session["imagecount"].ToString() == "3")
{

Img1.ImageUrl = ViewState["img1"].ToString();

Img2.ImageUrl = ViewState["img2"].ToString();

Img3.ImageUrl = FilePath;

ViewState["img3"] = FilePath;

}

else
if (Session["imagecount"].ToString() == "4")
{

Img1.ImageUrl = ViewState["img1"].ToString();

Img2.ImageUrl = ViewState["img2"].ToString();

Img3.ImageUrl = ViewState["img3"].ToString();

Img4.ImageUrl = FilePath;

ViewState["img4"] = FilePath;

}

else
if (Session["imagecount"].ToString() == "5")
{

Img1.ImageUrl = ViewState["img1"].ToString();

Img2.ImageUrl = ViewState["img2"].ToString();

Img3.ImageUrl = ViewState["img3"].ToString();

Img4.ImageUrl = ViewState["img4"].ToString();

Img5.ImageUrl = FilePath;

ViewState["img5"] = FilePath;

}

}

//execption handling


else

{

lblErrMsg.Visible = true;

lblErrMsg.Text = "";

lblErrMsg.Text = "please select a file";

}

}
 
//if file extension belongs to these list then only allowed

public
bool CheckFileType(string filename)
{

string
ext;
ext = System.IO.Path.GetExtension(filename);

switch
(ext.ToLower())
{

case
".gif":
return
true;
case
".jpeg":
return
true;
case
".jpg":
return
true;
case
".bmp":
return
true;
case
".png":
return
true;
default
:
return
false;
}

}
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