UpdateProgress Triggers

Hey gang.

I have a XmlDataSource (RSS Feed) bound to a DataList and I am curious how on initial load up I can display the update progress when the page is loaded?

I tried to do the following:

<Triggers> <atlas:ControlEventTrigger ControlID="XmlDataSource1" EventName="Transforming" /></Triggers>

I am really not sure how to tackle this. I know that the update progress occurs on executing server side code, but not sure how to attach it to data binding changes etc.

Thanks and take care!

hello.

well the updateprogess is a simple control that shows its content during a partial postback which might occur due to an updatepanel refresh. what you're trying to do (show progress while the processing is being done on the server side) can only be done during the initial page load or a complete postback (not during a partial postback!). there are several options that you can follow for that progress info during the rendering of the page ( I do believe thatwww.codeproject.com has several articles about it).

Thanks for your help!

How does Live.com show the RSS feed loading progress animation then when it is loading the feeds during the initial page load?

Thanks and take care.

hello.

well, i haven't used live.com for a while now. however, i'd say that what it does is show that info when it starts getting the info and then it removes it when it's finished. this is easilly achieved when you're using a web service to get the info (since it'll be donw asynchronously). btw, this is what happens when the panels postback. however, i do think that you only get the info that something is loading and don't get anything about the percentage of the operation being performed (which i assumed you needed in the previous post).

Updating a DataList with UpdatePanel

I've been trying to update my DataList with UpdatePanel but it's not working.

What I have is a text field for a user to enter comments and a save button, along with a DataList control all in an UpdatePanel.

Data is being saved on the table when the save button is clicked but the DataList is not updated unless I refresh the browser. What am I doing wrong?

Here is my ASP code:

 <asp:UpdatePanel ID="UpdatePanel3" runat="server"> <ContentTemplate> <asp:Panel ID="PanelCommentBody" runat="server" CssClass="collapsePanel" Width="451px"><br /> <asp:TextBox ID="txtComments" runat="server" Height="45px" TextMode="MultiLine" Width="412px" ValidationGroup="cmnts" ></asp:TextBox><br /> <asp:Label ID="lblComment" runat="server" Text="" Font-Size="Small"></asp:Label> <asp:RequiredFieldValidator ID="RFVComments" runat="server" ErrorMessage="Please enter comment." ValidationGroup="cmnts" ControlToValidate="txtComments" Font-Size="Small" Width="154px"></asp:RequiredFieldValidator> <asp:Button ID="bttnPostComment" runat="server" Text="Post Comment" OnClick="bttnPostComment_Click" ValidationGroup="cmnts" Width="122px" /> <asp:Button ID="bttnDiscard" runat="server" Text="Discard" OnClick="bttnDiscard_Click" CausesValidation="false" /> </asp:Panel> <cc1:CollapsiblePanelExtender ID="CollapsiblePanelExtender2" runat="server" CollapseControlID="closeComment" ExpandControlID="closeComment" TargetControlID="PanelCommentBody" Collapsed="true" SuppressPostBack="true"> </cc1:CollapsiblePanelExtender> <asp:DataList ID="DataList1" runat="server" DataSourceID="SqlDataSource1" Width="307px" Font-Size="Small"> <ItemTemplate> <strong>From: <a href="../Default.aspx?urnm=<%# Eval("UserName")%>"><asp:Label ID="FromLabel" runat="server" Font-Size="Small" Text='<%# Eval("UserName")%>'></asp:Label></a></strong> | Date Posted: <asp:Label ID="DateAddedLabel" runat="server" Text='<%# Eval("DateAdded", "{0:MMM dd, yy}")%>'></asp:Label><br /> <asp:Label ID="CommentLabel" runat="server" Text='<%# Eval("Comment")%>'></asp:Label><br /> <br /> </ItemTemplate> </asp:DataList><asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:MyDB%>" SelectCommand="SELECT [UserName], [Comment], [DateAdded] FROM [Comments] WHERE ([CL_Id] = @dotnet.itags.org.CL_Id) ORDER BY [DateAdded] DESC"> <SelectParameters> <asp:Parameter DefaultValue="1" Name="CL_Id" Type="String" /> </SelectParameters> </asp:SqlDataSource> </ContentTemplate> </asp:UpdatePanel>

Here is my Code Behind for the save button:

protected void bttnPostComment_Click(object sender, EventArgs e)
{
string flname = Request.QueryString["filename"];
flname = flname.Substring(0, flname.Length - 4);

if (User.Identity.IsAuthenticated)
{
MembershipUser myObject = Membership.GetUser();
string usrid = myObject.ProviderUserKey.ToString();
string usrname = User.Identity.Name;
string cmmnt1 = txtComments.Text;
string connStr = ConfigurationManager.ConnectionStrings["MyDB"].ConnectionString;
SqlConnection cnn = new SqlConnection(connStr);
SqlCommand cmd = new SqlCommand("INSERT INTO Comments (CL_Id, UserId, UserName, Comment) VALUES ('" + flname + "', '" + usrid + "', '" + usrname + "', '" + cmmnt1 +"')", cnn);
cnn.Open();
cmd.ExecuteNonQuery();
cnn.Close();
}
else
{
lblComment.Text = "You need to login to make comments";
}
}

----------

Thanks in advance,

Louis

1. Make UpdatePanel UpdateMode="Conditional"

2. after cnn.close(); write UpdatePanel3.Update()

Thanks siva sakki, I tried your suggestion but it still doesn't work.

What else can I try?

Louis

Updating a DataList with UpdatePanel

On Page_Load event, register DataList control

protected void Page_Load()
{
ScriptManager1.RegisterAsyncPostBackControl(DataList1);

DataList1.DataSource = this.SqlDataSource1;
DataList1.DataBind();
}

Thanks chetan, your suggestion might work. My problem is that I have the ScriptManger1 in the master page.

How can I reference this the way you have specified above?

Thank you,

Louis

I have tried the following to reference the the ScriptManger from content panel code behind:

ScriptManager.GetCurrent(this.Page).RegisterAsyncPostBackControl(DataList1);

is this the correct way of doing it? If it is my UpdatePanel still not updating. I have also removed this two lines:

//DataList1.DataSource = this.SqlDataSource1;
//DataList1.DataBind();

It is giving me this error:

Both DataSource and DataSourceID are defined on 'DataList1'. Remove one definition.

Do I need this two lines for it to work?

I am pulling my hair on this one.

Please help. Thanks again.

Louis

If you go back to the original code you submitted and add DataList1.DataBind() at the end of the button routine, you would probably achieve the results you want.

There is nothing to cause the DataList to rebind after the button event.

If you simply delete the UpdatePanel from the page, your code would not work either. As a rule, if doesn't work without Ajax, it won't work with it. The DataBinding event for the DataList has to run on the postback.

wrayx1 that did the trick.

Thank you soooo much!!!

Louis

Just do withDataList1.DataBind();

Let me know if this helps you

Okay, I have a similar question about updating using DataList. Will someone give me a hand on this. Here's what I have.

1<asp:ScriptManager ID="ScriptManager1" runat="server">2 </asp:ScriptManager>3<%--<asp:UpdatePanel ID="UpdatePanel1" runat="server">4 <ContentTemplate>--%>5 <asp:RadioButtonList ID="RadioButtonList1" runat="server" AutoPostBack="True">6 <asp:ListItem Value="True">Approved</asp:ListItem>7 <asp:ListItem Value="False" Selected="True">Not Approved</asp:ListItem>8 </asp:RadioButtonList>9 <asp:SqlDataSource ID="sqlApproval" runat="server" ConnectionString="<%$ ConnectionStrings:myConnStr%>"10 SelectCommand="SELECT [frstName], [lstName], [dvlID], [mdlName], [mdnName], [degree1], [degree2], [year1], [year2], [sp_frstName], [sp_lstName], [sp_year1], [sp_year2], [sp_mdlName], [sp_mdnName], [sp_degree1], [sp_degree2], [approval] FROM [dvlStory] WHERE ([approval] = @.approval)"11 DeleteCommand="DELETE FROM [dvlStory] WHERE [dvlID] = @.dvlID"12 InsertCommand="INSERT INTO [dvlStory] ([frstName], [lstName], [mdlName], [mdnName], [degree1], [degree2], [year1], [year2], [sp_frstName], [sp_lstName], [sp_year1], [sp_year2], [sp_mdlName], [sp_mdnName], [sp_degree1], [sp_degree2], [approval]) VALUES (@.frstName, @.lstName, @.mdlName, @.mdnName, @.degree1, @.degree2, @.year1, @.year2, @.sp_frstName, @.sp_lstName, @.sp_year1, @.sp_year2, @.sp_mdlName, @.sp_mdnName, @.sp_degree1, @.sp_degree2, @.approval)"13 UpdateCommand="UPDATE [dvlStory] SET [frstName] = @.frstName, [lstName] = @.lstName, [mdlName] = @.mdlName, [mdnName] = @.mdnName, [degree1] = @.degree1, [degree2] = @.degree2, [year1] = @.year1, [year2] = @.year2, [sp_frstName] = @.sp_frstName, [sp_lstName] = @.sp_lstName, [sp_year1] = @.sp_year1, [sp_year2] = @.sp_year2, [sp_mdlName] = @.sp_mdlName, [sp_mdnName] = @.sp_mdnName, [sp_degree1] = @.sp_degree1, [sp_degree2] = @.sp_degree2, [approval] = @.approval WHERE [dvlID] = @.dvlID">14 <SelectParameters>15 <asp:ControlParameter ControlID="RadioButtonList1" Name="approval" PropertyName="SelectedValue"16 Type="Boolean" />17 </SelectParameters>18 <DeleteParameters>19 <asp:Parameter Name="dvlID" Type="Int32" />20 </DeleteParameters>21 <UpdateParameters>22 <asp:Parameter Name="frstName" Type="String" />23 <asp:Parameter Name="lstName" Type="String" />24 <asp:Parameter Name="mdlName" Type="String" />25 <asp:Parameter Name="mdnName" Type="String" />26 <asp:Parameter Name="degree1" Type="String" />27 <asp:Parameter Name="degree2" Type="String" />28 <asp:Parameter Name="year1" Type="Int32" />29 <asp:Parameter Name="year2" Type="Int32" />30 <asp:Parameter Name="sp_frstName" Type="String" />31 <asp:Parameter Name="sp_lstName" Type="String" />32 <asp:Parameter Name="sp_year1" Type="Int32" />33 <asp:Parameter Name="sp_year2" Type="Int32" />34 <asp:Parameter Name="sp_mdlName" Type="String" />35 <asp:Parameter Name="sp_mdnName" Type="String" />36 <asp:Parameter Name="sp_degree1" Type="String" />37 <asp:Parameter Name="sp_degree2" Type="String" />38 <asp:Parameter Name="approval" Type="Boolean" />39 <asp:Parameter Name="dvlID" Type="Int32" />40 </UpdateParameters>41 <InsertParameters>42 <asp:Parameter Name="frstName" Type="String" />43 <asp:Parameter Name="lstName" Type="String" />44 <asp:Parameter Name="mdlName" Type="String" />45 <asp:Parameter Name="mdnName" Type="String" />46 <asp:Parameter Name="degree1" Type="String" />47 <asp:Parameter Name="degree2" Type="String" />48 <asp:Parameter Name="year1" Type="Int32" />49 <asp:Parameter Name="year2" Type="Int32" />50 <asp:Parameter Name="sp_frstName" Type="String" />51 <asp:Parameter Name="sp_lstName" Type="String" />52 <asp:Parameter Name="sp_year1" Type="Int32" />53 <asp:Parameter Name="sp_year2" Type="Int32" />54 <asp:Parameter Name="sp_mdlName" Type="String" />55 <asp:Parameter Name="sp_mdnName" Type="String" />56 <asp:Parameter Name="sp_degree1" Type="String" />57 <asp:Parameter Name="sp_degree2" Type="String" />58 <asp:Parameter Name="approval" Type="Boolean" />59 </InsertParameters>60 </asp:SqlDataSource>61 <br />62 <asp:DataList ID="dltApproval" runat="server" BackColor="White" BorderColor="#999999"63 BorderStyle="None" BorderWidth="1px" CellPadding="3"64 GridLines="Vertical" RepeatColumns="3" RepeatDirection="Horizontal" Width="700px" DataSourceID="sqlApproval">65 <FooterStyle BackColor="#CCCCCC" ForeColor="Black" />66 <SelectedItemStyle BackColor="#008A8C" Font-Bold="True" ForeColor="White" />67 <ItemTemplate>68 <table border="0" cellpadding="2" cellspacing="0">69 <tr>70 <td>71 <asp:Label ID="frstNameLabel" runat="server" Text='<%# loadStory()%>'></asp:Label>72 </td>73 <td>74 <asp:CheckBox ID="chbApproval" runat="server" Checked='<%# Bind("approval")%>' />75 </td>76 </tr>77 </table>78 </ItemTemplate>79 <AlternatingItemStyle BackColor="Gainsboro" />80 <ItemStyle BackColor="#EEEEEE" ForeColor="Black" />81 <HeaderStyle BackColor="#000084" Font-Bold="True" ForeColor="White" />82 </asp:DataList>83<%-- </ContentTemplate>84 </asp:UpdatePanel>--%>85 <table border="0" cellpadding="5" cellspacing="0" width="700">86 <tr>87 <td style="width: 100px; text-align: center">88 <asp:Button ID="btnUpdate" runat="server" OnClick="btnUpdate_Click" Text="Update" /></td>89 <td style="width: 100px; text-align: center">90 <asp:Button ID="btnFinish" runat="server" OnClick="btnFinish_Click" Text="Finish" /></td>91 </tr>92 <>  
 

And here's the code behind:

1protected void Page_Load(object sender, EventArgs e)2 {34 }5protected string loadStory()6 {7//load the data in here and display to the lable control8return strInfoHolder.ToString() ;9 }10protected void btnUpdate_Click(object sender, EventArgs e)11 {12 sqlApproval.Update();13 dltApproval.DataBind();14 }15protected void btnFinish_Click(object sender, EventArgs e)16 {17 Response.Redirect("~/Admin/");18 }

The problem I have is that it's not updating. At the moment, I disabled the AJAX UpdatePanel to figure out the udpate first. All I wanted is to update the Approval checkbox to the sqlDataSource control. Noticed I used Bind instead of Eval for the checkbox control that way I was hoping that once I called the sqlApproval.Update() method, the approval checkbox will automatically update the database field. However, that is not so. Any help is appreciated.

Updating an UpdatePanel only when certain item is clicked in Datalist

I have 2 UpdatePanels each with a Datalist in them. Here is my code:

<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
<Triggers>
<asp:AsyncPostBackTrigger ControlID="DataList2" />
</Triggers>
<ContentTemplate>
<asp:DataList ID="DataList1" runat="server" DataSourceID="Ods1"BorderStyle="Solid" GridLines="Both" RepeatDirection="Horizontal">
<ItemTemplate>
<asp:ImageButton ID="ThumbImage1" runat="server"ImageUrl='<imagepath...>' />
</ItemTemplate>
</asp:DataList>
</ContentTemplate>
</asp:UpdatePanel>
<asp:UpdatePanel ID="UpdatePanel2" runat="server" UpdateMode="Conditional" ChildrenAsTriggers="false">
<ContentTemplate>
<asp:DataList ID="DataList2" runat="server" RepeatColumns="4"DataSourceID="Ods2" BorderStyle="Solid" GridLines="Both"RepeatDirection="Horizontal" OnItemCommand="DataList2_ItemCommand"CellPadding="5">
<ItemTemplate>
<asp:ImageButton ID="ThumbImage2" runat="server"ImageUrl='<imagepath...>' CommandName="ThumbImage"CommandArgument='<passing the id...>' />
<br />
<asp:ImageButton ID="DeleteImage" runat="server"ImageUrl="images/delete.gif" CommandName="DeleteImage"CommandArgument='<passing the id...>' />
</ItemTemplate>
</asp:DataList>
</ContentTemplate>
</asp:UpdatePanel>

and the code in DataList2_ItemCommand is as follows:

protected void DataList2_ItemCommand(object source, DataListCommandEventArgs e)
{
if (e.CommandName == "DeleteImage")
{
//code to delete the image from database

...
this.DataList2.DataBind();
this.UpdatePanel2.Update();
}
else if (e.CommandName == "ThumbImage2")
{
//code to add the thumb image to the table attached to datalist1.
...
...
this.Datalist1.DataBind();
this.UpdatePanel1.Update();
}
}

As you can see in the above code, I want to update the UpdatePanel1 only when the imagebutton "ThumbImage2" is clicked and NOT when the imagebutton "DeleteImage" is clicked in Datalist2. But because Datalist2 is the cause of the AsyncPostBackTrigger for UpdatePanel1, it is updated when either one of the imagebuttons are clicked. Is there a way to change this?

Please help.

You don't want to set the datalist as the trigger, you want to set the individual ImageButtons as the triggers. Remove the triggers from UpdatePanel1, as well as the UpdateMode="Conditional".

<asp:UpdatePanelID="UpdatePanel1"runat="server">
<ContentTemplate>
...
</ContentTemplate>
</asp:UpdatePanel>

Then in the DataList2_ItemDatabound event, add the following:

ProtectedSub DataList2_ItemDataBound(ByVal senderAsObject,ByVal eAs System.Web.UI.WebControls.DataListItemEventArgs)Handles DataList2.ItemDataBound
Dim ibtnAs ImageButton =CType(e.Item.FindControl("ThumbImage2"), ImageButton)
Dim trggrAsNew AsyncPostBackTrigger
trggr.ControlID = ibtn.ClientID
trggr.EventName ="Click"
UpdatePanel1.Triggers.Add(trggr)
EndSub

In the ItemCommand event, I am executing some server side code for the imagebutton that was clicked in that specific row of datalist based on its id (which I retrieve using e.CommandArgument).

If I use the approach that you mentioned above, how do i retrieve the database id of the image clicked?

Thanks

DataList2.DataKeys.Item(e.Item.ItemIndex)

The solution you suggested works like a charm. I removed the datalist as the trigger & added the imagebutton as trigger in ItemDataBound event. Also, I still execute the server side code in ItemCommand event based on the which button clicked & everything works fine.

Thanks a ton.