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Reloading Treeview From Code Behind

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TreeView

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dotnetrockerzzz asked on 30 May 2011, 06:57 AM

<telerik:RadAjaxManager ID="RadAjaxManager1" runat="server"

EnablePageHeadUpdate="False">

<AjaxSettings>

<telerik:AjaxSetting AjaxControlID="lnkbutton">

<UpdatedControls>

<telerik:AjaxUpdatedControl ControlID="RadTreeView1" />

</UpdatedControls>

</telerik:AjaxSetting>

</AjaxSettings>

</telerik:RadAjaxManager>

lnkbutton is the ID of button which is in RadTreeview1 .

<telerik:RadTreeNode Value="pcomment">

<NodeTemplate>

<telerik:RadTextBox runat="server" Width="250px" ID="postcomment"></telerik:RadTextBox>

<asp:Button Text="Post" runat="server" ID="lnkbutton" onclick="lnkbutton_Click" ></asp:Button>

</NodeTemplate>

</telerik:RadTreeNode>

Code - Behind

protected void RadTreeView1_NodeExpand(object sender, RadTreeNodeEventArgs e)

{

string getc =

"SELECT  [User].Name, [User].ID, Comments.ID AS CID, Comments.Comment, Comments.ItemID, Comments.UID, [User].T28 FROM            [User] INNER JOIN Comments ON [User].ID = Comments.UID WHERE        (Comments.ItemID = 271)"

;

dt = dbClass.ReturnDT(getc);

if (dt.Rows.Count > 0)

{

int n = dt.Rows.Count;

for (int m = 0; m < n; m++)

{

RadTreeNode onDemandNode = new RadTreeNode();

onDemandNode.ImageUrl = dt.Rows[m]["T28"].ToString();

onDemandNode.Text = "<u><b><a href='Profile/profile.aspx?Id="+dt.Rows[m]["ID"].ToString()+"'>"+dt.Rows[m]["Name"].ToString()+"</a></b></u> "+ dt.Rows[m]["Comment"].ToString();

onDemandNode.ExpandMode = TreeNodeExpandMode.ClientSide;

//Add the node as a child of the currently expanded node

RadTreeView1.Nodes.FindNodeByText("Comments").Nodes.Add(onDemandNode);

}

}

     }

 protected void lnkbutton_Click(object sender, EventArgs e)

    {

       RadTextBox tb=  (RadTextBox)RadTreeView1.Nodes.FindNodeByValue("pcomment").FindControl("postcomment");

       string insertcomment = " INSERT INTO Comments (ItemID, UID, Comment) VALUES  (271, "+Session["UserId"]+", '"+tb.Text+"')";

       dbClass.DataBase(insertcomment);

      

    }

What I want is ,whenever the user clicks the button post that is the button with ID lnkbutton , the RadTreeView1 gets refreshed (without reloading the whole page again) , what should i do to achieve this ??

6 Answers, 1 is accepted

answered on 31 May 2011, 01:26 PM

TreePostBack.zip

Hello Vaibhav,

We inspected your code once again and we found no problem.I am sending you a little demo.

All trial users of Telerik Products can also use our support so if you still have some questions or we misunderstand you somehow please try to change the demo so that we can observe the problem and send it back as a support ticket.

Kind regards,
Plamen Zdravkov
the Telerik team

Browse the vast support resources we have to jump start your development with RadControls for ASP.NET AJAX. See how to integrate our AJAX controls seamlessly in SharePoint 2007/2010 visiting our common SharePoint portal.

answered on 02 Jun 2011, 03:25 PM

Hi Vaibhav,

Can you try setting your DataSource and calling DataBind again for RadTreeView on the button click event?

protected void lnkbutton_Click(object sender, EventArgs e)

{

RadTextBox b = RadTreeView1.FindNodeByValue("pcomment").FindControl("postcomment") as RadTextBox;

b.Text =DateTime.Now.ToString();

RadTreeView1.DataSource = yourdatasource;

RadTreeView1.DataBind();

}

Does this help?

Regards,
Plamen Zdravkov
the Telerik team