I use FileUpload control or HTML input type="file"
run on any Browser,chrome,I.E,android mobile.
It can run,only on IOS mobile do not work when Submit Button Click show "error"
<input type="file" name="UploadFile" id="UploadFile" class="form-control"/>
<asp:Button ID="Button" runat="server" Text="Submit" OnClick="Button_Click"/>
Code Behind
protected void Button_Click(object sender, EventArgs e)
{
HttpPostedFile postedFile = Request.Files["UploadFile"];
//Check if File is available.
if (postedFile != null && postedFile.ContentLength > 0)
{
string extension = Path.GetExtension(postedFile.FileName);
if (extension != ".png" && extension != ".jpg" && extension != ".jpeg")
{
Div1.Style["display"] = "flex";
Label7.Text = "＊CHOOSE(.png 或 .jpg 或 .jpeg)!! ";
return;
}
string filename = Path.GetFileName(postedFile.FileName);
string path = "";
path = "~/CustomerFeedbackPic/" + filename;
string serverDir = "";
serverDir = Server.MapPath(path);
postedFile.SaveAs(serverDir);
Response.Redirect("uploadsuccess.aspx");
}
}
Related
In my application i am using one Fileupload controller ,one dropdown and One button, Here first i am selecting one .doc file using fileupload controller, then i am selecting Dropdown value, when i am clicking button, it checks dropdown value is > 0 or not,
if (ddlstype.SelectedValue != "0")
if the ddlstype value is equals 0, then it shows an Error message in label.
Here the dropdown have AutoPostBack,code follows,
<asp:DropDownList ID="ddlstype" runat="server" AutoPostBack="true" OnSelectedIndexChanged="ddlstype_SelectedIndexChanged" Width="165px">
Here my problem is if the page is AutoPostBack, then the file upload control become null, how can i maintain the file in fileupload controler while AutoPostBack?
Here you store file path in session on page load. This way you not need to use update panel
protected void Page_Load(object sender, EventArgs e)
{
if (this.IsPostBack)
{
if (Session["FileUpload1"] == null && Request.Files["FileUpload1"].ContentLength > 0)
{
Session["FileUpload1"] = Request.Files["FileUpload1"];
ImageErrorLabel.Text = Path.GetFileName(Request.Files["FileUpload1"].FileName);
HttpPostedFile file = (HttpPostedFile)Session["FileUpload1"];
}
else if (Session["FileUpload1"] != null && (Request.Files["FileUpload1"].ContentLength == 0))
{
HttpPostedFile file = (HttpPostedFile)Session["FileUpload1"];
ImageErrorLabel.Text = Path.GetFileName(file.FileName);
}
else if (Request.Files["FileUpload1"].ContentLength > 0)
{
Session["FileUpload1"] = Request.Files["FileUpload1"];
ImageErrorLabel.Text = Path.GetFileName(Request.Files["FileUpload1"].FileName);
}
}
}
And get it on ddlstype_SelectedIndexChanged
protected void ddlstype_SelectedIndexChanged(object sender, EventArgs e)
{
HttpPostedFile FileUpload1 = Request.Files["FileUpload1"];
Session["FileUpload1"] = FileUpload1;
}
I am trying to store files from a Gridview upload into a Folder using Asp.net.
This is my markup code to generate Upload column and The button and File Upload control.
<asp:TemplateField HeaderText="Upload">
<ItemTemplate>
<asp:FileUpload ID="FileUpload1" runat="server" EnableViewState="true" AllowMultiple="true" />
<asp:Button ID="btnUpload" runat="server" CommandName="Upload" Text="OK" style=" color: #ff0000" OnClick="btnUpload_Click"/>
</ItemTemplate>
</asp:TemplateField>
I have my codebehind to handle btnUpload_Click as below:
protected void btnUpload_Click(object sender, GridViewCommandEventArgs e)
{
Response.Write("File has been passed");
Button bts = e.CommandSource as Button;
Response.Write(bts.Parent.Parent.GetType().ToString());
if (e.CommandName.ToLower() != "upload")
{
return;
}
FileUpload fu = bts.FindControl("FileUpload4") as FileUpload;//here
if (fu.HasFile)
{
bool upload = true;
string fleUpload = Path.GetExtension(fu.FileName.ToString());
if (fleUpload.Trim().ToLower() == ".xls" | fleUpload.Trim().ToLower() == ".xlsx")
{
fu.SaveAs(Server.MapPath("~/UpLoadPath/" + fu.FileName.ToString()));
string uploadedFile = (Server.MapPath("~/UpLoadPath/" + fu.FileName.ToString()));
//Someting to do?...
}
else
{
upload = false;
// Something to do?...
}
if (upload)
{
// somthing to do?...
}
}
else
{
//Something to do?...
}
}
I am getting this error:
CS0123: No overload for 'btnUpload_Click' matches delegate
'System.EventHandl
Can somebody please help me?
You're binding both Command and Click event with your button. Your button code should be like this-
<asp:TemplateField HeaderText="Upload">
<ItemTemplate>
<asp:FileUpload ID="FileUpload1" runat="server" EnableViewState="true" AllowMultiple="true" />
<asp:Button ID="btnUpload" runat="server" CommandName="Upload" Text="OK" style=" color: #ff0000"/>
</ItemTemplate>
</asp:TemplateField>
and from code behind capture the command not the event. like-
protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
Response.Write("File has been passed");
Button bts = e.CommandSource as Button;
Response.Write(bts.Parent.Parent.GetType().ToString());
if (e.CommandName.ToLower() != "upload")
{
return;
}
FileUpload fu = bts.FindControl("FileUpload1") as FileUpload;//here
if (fu.HasFile)
{
bool upload = true;
string fileName = Path.GetFileName(fu.PostedFile.FileName);
string fleUpload = Path.GetExtension(fu.PostedFile.FileName);
if (fleUpload.Trim().ToLower() == ".xls" || fleUpload.Trim().ToLower() == ".xlsx")
{
fu.SaveAs(Server.MapPath("~/UpLoadPath/" + fileName));
string uploadedFile = (Server.MapPath("~/UpLoadPath/" + fileName ));
//Someting to do?...
}
else
{
upload = false;
// Something to do?...
}
if (upload)
{
// somthing to do?...
}
}
else
{
//Something to do?...
}
}
above I'm assuming your gridview ID is GridView1. And another one your File Uploader control's ID was mismatched with your code behind. This should work.
I wanted to display a list of files in a specific folder as hyperlinks, and when the user click on the link, it will open the respective file to prompt the user to download or view but there is a constant error saying:
{"Value cannot be null.\r\nParameter name: filename"} at the line context.Response.WriteFile(context.Request.QueryString["files"]);
I've tried lots of ways but to no avail.
ASHX file:
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
var directory = new DirectoryInfo("C:\\temp\\Safety&Security");
var files = (from f in directory.GetFiles()
orderby f.LastWriteTime descending
select f).First();
//string[] files = Directory.GetFiles(#"C:\temp\Safety&Security");
//files = files.Substring(files.LastIndexOf(("\\")) + 1);
rpt.DataSource = files;
rpt.DataBind();
}
if (!Page.IsPostBack)
{
string[] files = Directory.GetFiles(#"C:\temp\marketing");
Repeater1.DataSource = files;
Repeater1.DataBind();
}
if (!Page.IsPostBack)
{
string[] files = Directory.GetFiles(#"C:\temp\IT");
Repeater2.DataSource = files;
Repeater2.DataBind();
}
}
protected void rpt_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
if (e.Item.ItemType == ListItemType.AlternatingItem || e.Item.ItemType == ListItemType.Item)
{
string file = e.Item.DataItem as string;
HyperLink hyp = e.Item.FindControl("hyp") as HyperLink;
hyp.Text = file;
hyp.NavigateUrl = string.Format("~/Handlers/FileHandler.ashx?file={0}", file);
FileInfo f = new FileInfo(file);
FileStream s = f.Open(FileMode.OpenOrCreate, FileAccess.Read);
}
}
public void ProcessRequest(HttpContext context)
{
//Track your id
//string id = context.Request.QueryString["id"];
context.Response.Clear();
context.Response.Buffer = true;
context.Response.ContentType = "application/octet-stream";
context.Response.AddHeader("Content-Disposition", "attachment; filename=" + context.Request.QueryString["files"]);
context.Response.WriteFile(context.Request.QueryString["files"]);
context.Response.End();
}
public bool IsReusable
{
get { return false; }
}
This is the index page codes:
<li class='has-sub'><a href='#'><span>Safety, QA & Security</span></a>
<ul>
<asp:Repeater ID="rpt" runat="server" OnItemDataBound="rpt_ItemDataBound">
<ItemTemplate>
<asp:HyperLink ID="hyp" runat="server" target="_blank" a href="/Handlers/FileHandler.ashx?id=7"/>
<%-- another method of listing all files in specific folder --%>
<%--<% foreach(var file in Directory.GetFiles("C:\\temp\\Safety&Security", "*.*", SearchOption.AllDirectories)) { %>
<li><%= file.Substring(file.LastIndexOf(("\\"))+1) %></li>
<% } %> --%>
</ItemTemplate>
</asp:Repeater>
</ul>
</li>
You've made a silly mistake!
hyp.NavigateUrl = string.Format("~/Handlers/FileHandler.ashx?file={0}", file);
context.Response.WriteFile(context.Request.QueryString["files"]);
You're setting the querystring as 'file' but reading the querystring as 'files' which doesn't exist. Try
context.Response.WriteFile(context.Request.QueryString["file"]);
EDIT:
Try this code. First add a file in your c:\temp called test.txt and put some text in there. In your aspx:
<li class='has-sub'><a href='/Handlers/FileHandler.ashx?file=c:\temp\test.txt'><span>Safety, QA & Security</span></a></li>
In your handler:
public void ProcessRequest(HttpContext context)
{
//Track your id
//string id = context.Request.QueryString["id"];
context.Response.Clear();
context.Response.Buffer = true;
context.Response.ContentType = "application/octet-stream";
context.Response.AddHeader("Content-Disposition", "attachment; filename=" + context.Request.QueryString["file"]);
context.Response.WriteFile(context.Request.QueryString["file"]);
context.Response.End();
}
public bool IsReusable
{
get { return false; }
}
Set a breakpoint in your handler and make sure your handler gets hit when you debug. This code won't work as you need it to because of the other problem I mentioned in the comments about your data binding not working but you should at least get the querystring in your handler and the text file will download.
In my website I am uploading photos through asp:FileUpload [multiple files - images].. After uploading I am displaying them in a Panel along with a textbox to write description for the uploaded Images. Then am going to save them in database. But I am not able to find the values of the textbox or find the controls I have added to the panel when in my save event. But the images and textbox will be displayed in the panel.
My frontend code is something like this:
<form id="form1" runat="server">
<div class="transbox" id="mainbk" runat="server" style="position:absolute; top:0px; left:0px; width: 100%; height: 100%;" >
<asp:FileUpload runat="server" ID="UploadImages" style="background-color:white; position:absolute; font-family:'Palatino Linotype'; font-size:medium; top: 4px; left: 350px; right: 251px;" Width="500px" AllowMultiple="true"/>
<asp:Button runat="server" ID="uploadedFile" style="position:absolute; font-family:'Palatino Linotype'; font-size:medium; top: 4px; left: 870px; width: 112px; height: 29px;" Text="Upload" OnClick="uploadFile_Click" />
<asp:Panel ID="updtpanel" runat="server" CssClass="transbox" style="width:100%;height:100%;left:0px;top:0px;position:absolute" Visible="false">
<asp:Button ID="btnsave" runat="server" Text="Save" OnClick="btnsave_Click" Font-Bold="true" BackColor="Yellow" />
</asp:Panel>
</div>
</form>
and my backend code is something like this:
protected void uploadFile_Click(object sender, EventArgs e)
{
if (UploadImages.HasFiles)
{
int tid = 0;
string fileExt = Path.GetExtension(UploadImages.FileName).ToLower();
if (fileExt == ".jpeg" || fileExt == ".png" || fileExt == ".jpg" || fileExt == ".bmp")
{
HtmlGenericControl dh = new HtmlGenericControl("div");
dh.Attributes.Add("class", "head");
dh.InnerText = "Write Description";
updtpanel.Controls.Add(dh);
HtmlGenericControl dload;
foreach (HttpPostedFile uploadedFile in UploadImages.PostedFiles)
{
tid = tid + 1;
textid = "txt" + tid;
Image img = new Image();
TextBox ta = new TextBox();
ta.TextMode = TextBoxMode.MultiLine;
filepath = Server.MapPath("~/Images/Gallery/" + uploadedFile.FileName);
uploadedFile.SaveAs(filepath);
newpath = "../Images/Gallery/" + uploadedFile.FileName;
try
{
dload = new HtmlGenericControl("div");
updtpanel.Visible = true;
dload.Attributes.Add("class", "dataload");
dload.Attributes.Add("runat", "server");
dload.ID = "ind" + tid;
img.CssClass = "loadimg";
img.ImageUrl = newpath.ToString();
img.ID = "img"+tid;
img.Attributes.Add("runat", "server");
ta.Attributes.Add("class", "txtdes");
ta.ID = textid;
ta.Attributes.Add("runat", "server");
dload.Controls.Add(img);
dload.Controls.Add(ta);
updtpanel.Controls.Add(dload);
}
catch (Exception ex)
{
Response.Write(ex.Message);
}
}
}
else
{
Page.ClientScript.RegisterStartupScript(GetType(), "msgbox", "alert('Please Select only Image Files!!');", true);
}
}
else
{
Page.ClientScript.RegisterStartupScript(GetType(), "msgbox", "alert('Please Select a File First!!');", true);
}
}
protected void btnsave_Click(object sender, EventArgs e)
{
foreach (Control c in updtpanel.Controls)
{
cnt1 += 1;
HtmlGenericControl div = ((HtmlGenericControl)updtpanel.FindControl("ind"+cnt1.ToString()));
foreach (Control nc in div.Controls)
{
string str = "";
string iurl = "";
TextBox txt = (TextBox)div.FindControl("txt" + cnt1.ToString());
Image img = (Image)div.FindControl("img" + cnt1.ToString());
str = txt.Text;
iurl = img.ImageUrl;
id += 1;
string Insert = "Insert into slider (slid,slurl,slalt) values (#id,#IMAGE_PATH,#alter)";
SqlCommand cmd = new SqlCommand(Insert, con);
cmd.Parameters.AddWithValue("#IMAGE_PATH", iurl);
cmd.Parameters.AddWithValue("#id", id);
cmd.Parameters.AddWithValue("#alter", str);
try
{
con.Open();
cmd.ExecuteNonQuery();
con.Close();
}
catch (Exception e1)
{
Response.Write(e1.Message);
}
}
}
updtpanel.Visible = false;
}
But its giving an error while saving which says object reference not set to an instance of the object after Findcontrol in save click event. Where I am going wrong. I am really working this from past 3 days but still not able to get it. Please show me a way out of this.
Is there anything else I need to add to this? I came across some site where some of them said that controls need to be recreated in Page_Load after postback. But when I am creating controls in an event How can I recreate them back in Page_Load.
Try this.Works for me try replacing the contentplaceholder with the form id may work.
String Value= (this.Form.FindControl("ContentPlaceHolder1").FindControl("panel").FindControl("txtbx" ) as TextBox).Text;
I have been working on an image/file uploader that stores an image to a virtual directory with MapPath or to a database. I have been using if statements for the button click event to check the file and attempt to save but I have not been successful.
protected void Button1_Click(object sender, EventArgs e)
{
if (FileUpload1.HasFile)
{
string extension = Path.GetExtension(FileUpload1.FileName);
if (extension == ".jpg" || extension == ".gif" || extension == ".png" || extension == ".bmp")
{
FileUpload1.SaveAs(Server.MapPath("../photos/" + FileUpload1.FileName));
string imagePath = "/photos/" + FileUpload1.FileName;
please try this
FileUpload1.SaveAs(Server.MapPath(#"~\photos\" + FileUpload1.FileName));