Re: Ajax Uploader - more control over 'Cancel All Uploads' button

  •  06-10-2011, 9:13 AM

    Re: Ajax Uploader - more control over 'Cancel All Uploads' button

    Hi mchamo,
     
    1) In client side, handle the event of the cancel all uploads button so that I can do other client side actions when this happens.
     
    2) I would like to have my own button (called something else and not necessarily tied to the ajax uploader control) remove all selected files (in client side code) from the ajax uploader. I already have this button performing other client side activities, but now I also need it to remove the files that have been selected to be uploaded.
     
    You can refer to the following code:

    <%@ Page Language="C#" %>

    <%@ Import Namespace="CuteWebUI" %>
    <%@ Register TagPrefix="CuteWebUI" Namespace="CuteWebUI" Assembly="CuteWebUI.AjaxUploader" %>
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

    <script runat="server">

     protected void UploadAttachments1_AttachmentAdded(object sender, AttachmentItemEventArgs args)
     {
      TextBox tb = (TextBox)args.Item.FindControl("textboxDesc");
      tb.Text = args.Item.ClientData;
     }

     protected void UploadAttachments1_AttachmentCreated(object sender, AttachmentItemEventArgs args)
     {
      TextBox tb = (TextBox)args.Item.FindControl("textboxDesc");
      tb.TextChanged += new EventHandler(tb_TextChanged);
     }

     void tb_TextChanged(object sender, EventArgs e)
     {
      TextBox tb=(TextBox)sender;
      for (Control c = tb; c != null; c = c.Parent)
      {
       if (c is AttachmentItem)
       {
        ((AttachmentItem)c).ClientData = tb.Text;
        return;
       }
      }
     }

     protected void buttonTell_Click(object sender, EventArgs e)
     {
      StringBuilder sb = new StringBuilder();
      sb.Append("There's " + UploadAttachments1.Items + " items:");
      foreach (AttachmentItem item in UploadAttachments1.Items)
      {
       sb.Append("<br/>");
       sb.Append(item.FileName);
       sb.Append("&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;&nbsp;&nbsp;&nbsp;");
       sb.Append(item.ClientData);
      }
      labelMsg.Text = sb.ToString();
     }
    </script>

    <html xmlns="http://www.w3.org/1999/xhtml">
    <head id="Head1" runat="server">
     <title>Untitled Page</title>
    </head>
    <body>
     <form id="form1" runat="server">
      <div>
       <button id='btnUpload' style="display: none;" onclick="Upload_Click();return false;">
        Start Upload</button>
       <CuteWebUI:UploadAttachments runat="server" ID="UploadAttachments1" ManualStartUpload="True"
        OnAttachmentAdded="UploadAttachments1_AttachmentAdded" OnAttachmentCreated="UploadAttachments1_AttachmentCreated"
        NumFilesShowCancelAll="1000" InsertText="Add files">
        <ItemTemplate>
         <asp:TextBox runat="server" ID="textboxDesc" />
        </ItemTemplate>
       </CuteWebUI:UploadAttachments>
       <br />
       <table id='clientTable' style="display: none; font-size: 9pt; border-collapse: collapse"
        border="1" cellspacing="0" cellpadding="5">
        <tr>
         <td>
          FileName
         </td>
         <td>
          Description
         </td>
         <td>
          Status
         </td>
        </tr>
       </table>
       <br />
       <asp:Button runat=server ID="buttonTell" Text="Tell me how to get the server textbox values" OnClick="buttonTell_Click" OnClientClick="return buttonTell_Click()" />
       <br />
       <asp:Label runat=server ID="labelMsg" />
      </div>
     </form>
    </body>

    <script>
        var btnUpload = document.getElementById("btnUpload");
        var clientTable = document.getElementById("clientTable");
        var uploader = document.getElementById('<%=UploadAttachments1.ClientID %>');
        var buttonTell = document.getElementById('<%=buttonTell.ClientID %>');
        var buttonTellClicked = false;

        function Upload_Click() {
            uploader.startupload();
        }

        function buttonTell_Click() {
            buttonTellClicked = true;
            var items = uploader.getitems();
            for (var i = 0; i < items.length; i++) {
                switch (items[i].Status) {
                    case "Queue":
                    case "Upload":
                        uploader.startupload();
                        return false;
                }
            }
            return true;
        }

        function CuteWebUI_AjaxUploader_OnPostback() {
            if (buttonTellClicked) {
                buttonTell.click();
                return false;
            }
        }

        function CuteWebUI_AjaxUploader_OnQueueUI(files) {
            btnUpload.style.display = files.length > 0 ? "" : "none";

            clientTable.style.display = files.length > 0 ? "" : "none";

            ShowMyClientTable(files);

            return false;
        }

        function ShowMyClientTable(files) {
            var map = {}
            var newlist = [];
            for (var i = 1; i < clientTable.rows.length; i++) {
                var row = clientTable.rows.item(i);
                row._scan = false;
                map[row._filekey] = row;
            }
            //update existing row
            for (var i = 0; i < files.length; i++) {
                var file = files[i];
                var row = map[file.InitGuid || file.FileName];
                if (row == null) {
                    newlist.push(file);
                    continue;
                }
                row._scan = true;
                UpdateToRow(row, file);
            }
            //delete removed row
            for (var i = 1; i < clientTable.rows.length; i++) {
                var row = clientTable.rows.item(i);
                if (!row._scan) {
                    clientTable.deleteRow(i);
                    i--;
                }
            }
            //add new row:
            for (var i = 0; i < newlist.length; i++) {
                var file = newlist[i];
                var row = clientTable.insertRow(-1);
                row.insertCell(-1);
                row.insertCell(-1);
                row.insertCell(-1);
                UpdateToRow(row, file);
            }
        }
        function UpdateToRow(row, file) {
            row._file = file;

            row._filekey = file.InitGuid || file.FileName;

            if (!row._textbox) {
                row._textbox = document.createElement("INPUT");
                row._textbox.type = "text";
                row.cells.item(1).appendChild(row._textbox);
            }

            row._textbox.onchange = function () {
                file.SetClientData(row._textbox.value);
            }

            row.cells.item(0).innerHTML = file.FileName;

            switch (file.Status) {
                case "Queue":
                    row.cells.item(2).innerHTML = "<a href='#' onclick='CancelQueueItem(this);return false'>remove</a>";
                    break;
                case "Finish": //uploaded
                case "Upload": //uploading
                case "Error": //cancelled
                default:
                    row.cells.item(2).innerHTML = file.Status;
                    break;
            }
        }
        function CancelQueueItem(link) {
            var td = link.parentNode;
            var row = td.parentNode;
            var file = row._file;
            file.Cancel();
        }
       
    </script>


    <script type="text/javascript">
        //prevent duplicated items:
        function CuteWebUI_AjaxUploader_OnSelect(files) {
            var sames = [];
            var items = uploader.getitems();
            for (var i = 0; i < files.length; i++) {
                var file = files[i];
                var exists = false;
                for (var j = 0; j < items.length; j++) {
                    var item = items[j];
                    if (item.FileName == file.FileName) {
                        exists = true;
                    }
                }
                if (exists) {
                    sames.push(file.FileName);
                    file.Cancel();
                }
            }
            if (sames.length > 0) {
                alert("These file(s) are already in the queue : \r\n\t" + sames.join('\r\n\t'));
            }
        }
    </script>

    </html>

     
    Thanks for asking
View Complete Thread