ASP.Net Error: Both DataSource and DataSourceID are defined on ListView1. Remove one definition

Hi phonghue,

Check this example. Now please take its reference and correct your code.

HTML

<asp:ListView ID="ListView1" runat="server" DataSourceID="SqlDataSource1" OnItemDataBound="ListView1_OnItemDataBound">
    <ItemTemplate>
        <table>
            <tr>
                <td>
                    <p class="padding4">
                        <asp:Label ID="OPPubDescripLabel" runat="server" Text='<%# Eval("Content") %>' Font-Size="12px"
                            Font-Names="Arial" Width="650px"></asp:Label>
                    </p>
                </td>
            </tr>
        </table>
    </ItemTemplate>
</asp:ListView>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:TestConnectionString %>"
    SelectCommand="SELECT * FROM [HTMLContent]"></asp:SqlDataSource>

C#

protected void ListView1_OnItemDataBound(object sender, ListViewItemEventArgs e)
{
    Label lblMessage = (e.Item.FindControl("OPPubDescripLabel") as Label);
    if (!string.IsNullOrEmpty(lblMessage.Text))
    {
        lblMessage.Text = lblMessage.Text.Replace("\\r", "<br/>");
    }
}

VB.Net

Protected Sub ListView1_OnItemDataBound(ByVal sender As Object, ByVal e As ListViewItemEventArgs) Handles ListView1.ItemDataBound
    Dim lblMessage As Label = (TryCast(e.Item.FindControl("OPPubDescripLabel"), Label))
    If Not String.IsNullOrEmpty(lblMessage.Text) Then
        Dim newString As String = lblMessage.Text.Replace(Strings.Chr(13), "<br/>")
        lblMessage.Text = newString
    End If
End Sub

Output