Get Values from two List And display Repeater

Question

I am trying to get the Values from two Lists what have i dont wrong? i dont get any errors the site is only updating nothing more just like it dont fel that i press the button

protected void Button1_Click(object sender, EventArgs e)
    {
        try
        {

            if (DropDownListFeeds.SelectedValue=="0")
            {
                SPWeb web = SPContext.Current.Web;

                SPSiteDataQuery query = new SPSiteDataQuery();
                query.Lists =
                    "<Lists><List ID=\"98B914FA%2DA714-44DB-9A44%2D80ADE288F18E\"/><List ID=\"D1E0691B-33E3%2D49EF%2DA0B9-F96C1F166AFD\"/></Lists>";

                query.Query =
                    string.Format("<OrderBy><FieldRef Name='Modified' Ascending='FALSE'></FieldRef></OrderBy>");
                query.Webs = "<Webs Scope=\"SiteCollection\" />";

                query.RowLimit = 10;


                DataTable dataTable = web.GetSiteData(query);





                Repeater2.DataSource = dataTable;

                Repeater2.DataBind();


            }

        }
        catch (Exception x)
        {

            Label1.Text = x.Message;
        }

Answer 1

MS Documentation has it as

query.Webs = "<Webs Scope=\"SiteCollection\" />";

Instead of:

query.Webs = "<Webs Scope=\"SiteCollection\">";

Not sure if that is what is blowing up your code though. As mentioned above the ID's do look off.

Answer 2

You List IDs are not looking right, Here's an example of how it should be like,

<Lists>
  <List ID="7A9FDBE6-0841-430a-8D9A-53355801B5D5" />
  <List ID="3D18F506-FCA1-451e-B645-2D720DC84FD8" />
</Lists>

Source

If after fixing it, it still doesn't work then try to debug it and find where exactly its getting error.

Hope it helps.