Filterung gridview mit textbox in Kopfzeile

Soo ich versuche, meine filter gridview mit textboxes im header. Ich erstellte eine textchanged Methode für jeden textbox. Ich möchte nun filtern Sie die gridview binden und die gefilterten Daten. Für einige Grund, die datasource null ist, sobald es trifft die textchanged Methode. Siehe meinen code unten:

<asp:GridView ID="GridView_Imported" runat="server" CssClass="GridView-Upload" Width="100%" OnRowDataBound="GridView_Imported_RowDataBound" HorizontalAlign="Center" AutoGenerateColumns="False">
            <Columns>
                <asp:TemplateField>
                    <HeaderTemplate>
                        <asp:CheckBox ID="checkAll" runat="server" CssClass="checkAll" onclick="checkAll(this);" />
                    </HeaderTemplate>
                    <ItemTemplate>
                        <asp:CheckBox ID="chkCtrl" runat="server" CssClass="chkCtrl" onclick="Check_Click(this)" />
                    </ItemTemplate>
                    <HeaderStyle HorizontalAlign="Center" />
                </asp:TemplateField>
                <asp:TemplateField AccessibleHeaderText="filter">
                    <HeaderTemplate>
                        <asp:Label ID="lbArticleName" runat="server" Text="Article-Name:" CssClass="Article-Name-Label"></asp:Label>
                        <br/>
                        <asp:TextBox ID="tbFilterArticleName" runat="server" placeholder="Filter..." OnTextChanged="tbFilterArticleName_TextChanged" AutoPostBack="True"></asp:TextBox>
                    </HeaderTemplate>
                    <ItemTemplate>
                        <asp:Label ID="ArticleNameText" runat="server" Text='<%# Eval("Article-Name") %>'></asp:Label>
                    </ItemTemplate>
                    <HeaderStyle HorizontalAlign="Center" />
                </asp:TemplateField>

                <asp:TemplateField>
                    <HeaderTemplate>
                        <asp:Label ID="lbArticle" runat="server" Text="Article:" CssClass="Article-Label"></asp:Label>
                        <br/>
                        <asp:TextBox ID="tbFilterArticle" runat="server" placeholder="Filter..." OnTextChanged="tbFilterArticle_TextChanged" AutoPostBack="True"></asp:TextBox>
                    </HeaderTemplate>
                    <ItemTemplate>
                        <asp:Label ID="lbArticleText" runat="server" Text='<%# Eval("Article") %>'></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField>
                    <HeaderTemplate>
                        <asp:Label ID="lbWarehouse" runat="server" Text="Warehouse:" CssClass="Warehouse-Label"></asp:Label>
                        <br/>
                        <asp:TextBox ID="tbFilterWarehouse" runat="server" placeholder="Filter..." OnTextChanged="tbFilterWarehouse_TextChanged" AutoPostBack="True"></asp:TextBox>
                    </HeaderTemplate>
                    <ItemTemplate>
                        <asp:Label ID="lbWarehouseText" runat="server" Text='<%# Eval("Warehouse") %>'></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField>
                    <HeaderTemplate>
                        <asp:Label ID="lbLocation" runat="server" Text="Location:" CssClass="Location-Label"></asp:Label>
                        <br/>
                        <asp:TextBox ID="tbFilterLocation" runat="server" placeholder="Filter..." OnTextChanged="tbFilterLocation_TextChanged" AutoPostBack="True"></asp:TextBox>
                    </HeaderTemplate>
                    <ItemTemplate>
                        <asp:Label ID="lbLocationText" runat="server" Text='<%# Eval("Location") %>'></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>

            </Columns>

            <HeaderStyle HorizontalAlign="Center" />
            <RowStyle HorizontalAlign="Center" />

        </asp:GridView>

        protected void tbFilterArticleName_TextChanged(object sender, EventArgs e)
        {
            var tb = (TextBox) sender as TextBox;

            GridView_Imported.DataSource = (Session["dataSource"] as DataTable).DefaultView.RowFilter = string.Format("Article-Name LIKE '%{0}%'", tb.Text.Trim());


            GridView_Imported.DataBind();
        }

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InformationsquelleAutor user1746378 | 2014-09-23
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