Lost TextBox Value in ServerSide RadXmlHttpPanel Event

[Hakan]

I couldnt get TextBox value Which is placed inside of the XmlHttpPanel.Why I lost value?
There are no TextBox values XmlHttpPanel_ServiceRequest2 event,Values also set  XmlHttpPanel_ServiceRequest
event.Just I can take values with js and panel.set_value but When I have a many TextBoxes this is problem.
C Sharp Code

   protected void XmlHttpPanel_ServiceRequest(object sender, RadXmlHttpPanelEventArgs e)
    {
            string val = e.Value;
            DataSet ds = db.dbRead("Select * from Doctors where Id=" + val + "");
            TextBox1.Attributes.Add("Value", ds.Tables[0].Rows[0]["Header"].ToString());
            TextBox1.Text = ds.Tables[0].Rows[0]["Header"].ToString();
            TextBox2.Text = ds.Tables[0].Rows[0]["ShortDescription"].ToString();
            TextBox3.Text = val;
    }

    protected void XmlHttpPanel_ServiceRequest2(object sender, RadXmlHttpPanelEventArgs e)
    {
        //Random numbers = new Random();
        //int index = numbers.Next(1, 10);
        int i = db.dbWrite("update doctors set Header='" + TextBox1.Text + "',ShortDescription='" + TextBox1.Text + "' where Id=" + TextBox1.Text + "");
        RadGrid1.DataSource = LoadData();
        RadGrid1.CurrentPageIndex = 0;
        RadGrid1.DataBind();

    }

JS COde  function rowSelected(sender, args) {

var key = args.getDataKeyValue("Id");

var panel = $find("<%=RadXmlHttpPanel1.ClientID %>");

panel.set_value(key);

}

function UpdateGrid() {

var panel = $find("<%=RadXmlHttpPanel2.ClientID %>");

panel.set_value("any value");

}

HTML CODE <telerik:RadXmlHttpPanel ID="RadXmlHttpPanel1" runat="server"  OnServiceRequest="XmlHttpPanel_ServiceRequest"

RenderMode="Block">

<asp:Button ID="Button1" runat="server" Text="Update Record and Grid " OnClientClick="UpdateGrid();return false;"  />

<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>

<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>

<asp:TextBox ID="TextBox3" runat="server"></asp:TextBox>

</telerik:RadXmlHttpPanel>

<telerik:RadXmlHttpPanel ID="RadXmlHttpPanel2" runat="server" EnableClientScriptEvaluation="true"  OnServiceRequest="XmlHttpPanel_ServiceRequest2"

RenderMode="Block">

<telerik:RadGrid ID="RadGrid1"  Skin="Hay"  OnNeedDataSource="RadGrid1_NeedDataSource"

Width="370px" AllowSorting="True"   PageSize="10" AllowPaging="True" runat="server"

AutoGenerateColumns="false" GridLines="None">

<MasterTableView ClientDataKeyNames="Id" Width="100%"  >

<Columns>

<telerik:GridBoundColumn DataField="Id"  Visible="false">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn HeaderText="Name" DataField="Header" UniqueName="Header"  >

</telerik:GridBoundColumn>

<telerik:GridBoundColumn HeaderText="Address" DataField="ShortDescription" UniqueName="ShortDescription">

</telerik:GridBoundColumn>

</Columns>

</MasterTableView>

<PagerStyle Mode="NumericPages" PageButtonCount="5" />

<ClientSettings EnableRowHoverStyle="true" Selecting-AllowRowSelect="true" ClientEvents-OnRowSelected="rowSelected">

</ClientSettings>

</telerik:RadGrid>

</telerik:RadXmlHttpPanel>

[Pero]

Hi Hakan,

The RadXmlHttpPanel uses ASP.NET client callbacks to retrieve its HTML from the server. The page does not go through its standard lifecycle - most importantly the ViewState is not loaded and saved. This means that, if you change a property of a server control, the new value will not be persisted. That's why the value of the TextBox is lost.

More information about the RadXmlHttpPanel control can be found on our website: http://www.telerik.com/help/aspnet-ajax/radxmlhttppanel.html.


All the best,
Pero
the Telerik team

[piotre6]

If service is used to send data to server should l it work? i have another problem with xmlhttppanel. after server request all client side function sucha asremoving empty message on click is gone . Do you know what mayer be the reason ?


I have found the solution myself. For those who have same problem,
make sure you have:
EnableClientScriptEvaluation="true"
in your XmlHttpPanel.