[Débutant] Filtre GridView avec DropDownList

Bonjour à tous,

je chercher à filtrer un GridView avec des listes déroulantes (une DropDownList par champ),
voici mon code :
Code:
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<div class="element_corps">
        <center><h3><b style="color: #FFFFFF">ELECTRE</b></h3></center>
	   <hr />
       <table>
       <tr>
       <td>
       <asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="true"
            DataSourceID="SqlDataSource_EAN" DataTextField="EAN"
            DataValueField="EAN" AppendDataBoundItems="true">
           <asp:ListItem Value="%">All</asp:ListItem>
       </asp:DropDownList>
       </td>
 
       <td>
       <asp:DropDownList ID="DropDownList2" runat="server" AutoPostBack="true"
            DataSourceID="SqlDataSource_Editor" DataTextField="Editor"  
            DataValueField="Editor" AppendDataBoundItems="true">
            <asp:ListItem Value="%">All</asp:ListItem>
       </asp:DropDownList>
       </td>
 
       <td>
       <asp:DropDownList ID="DropDownList3" runat="server" AutoPostBack="true"
            DataSourceID="SqlDataSource_Distributor" DataTextField="Distributor"  
            DataValueField="Distributor" AppendDataBoundItems="true">
            <asp:ListItem Value="%">All</asp:ListItem>
        </asp:DropDownList>
       </td>
 
       <td>
       <asp:DropDownList ID="DropDownList4" runat="server" AutoPostBack="true"
            DataSourceID="SqlDataSource_TVA" DataTextField="TVA" 
            DataValueField="TVA" AppendDataBoundItems="true">
            <asp:ListItem Value="%">All</asp:ListItem>
        </asp:DropDownList>
       </td>
 
       <td>
       <asp:DropDownList ID="DropDownList5" runat="server" AutoPostBack="true"
            DataSourceID="SqlDataSource_DISP" DataTextField="DISP"
            DataValueField="DISP" AppendDataBoundItems="true">
            <asp:ListItem Value="%">All</asp:ListItem>
        </asp:DropDownList>
       </td>
 
       <td>
       <asp:DropDownList ID="DropDownList6" runat="server" AutoPostBack="true"
            DataSourceID="SqlDataSource_Intergrate_date" DataTextField="Integrate_date" 
            DataValueField="Integrate_date" AppendDataBoundItems="true">
            <asp:ListItem Value="%">All</asp:ListItem>
        </asp:DropDownList>
       </td>
 
       <td>
       <asp:DropDownList ID="DropDownList7" runat="server" AutoPostBack="true"
            DataSourceID="SqlDataSource_File_Name" DataTextField="File_Name" 
            DataValueField="File_Name" AppendDataBoundItems="true">
            <asp:ListItem Value="%">All</asp:ListItem>
        </asp:DropDownList>
       </td>
       </tr>
       </table>
 
    <asp:SqlDataSource ID="SqlDataSource_EAN" runat="server" 
            ConnectionString="<%$ ConnectionStrings:DWHConnectionString3 %>" 
            SelectCommand="SELECT DISTINCT [EAN] FROM [Rejection_Data] ORDER BY [EAN]"></asp:SqlDataSource>
 
    <asp:SqlDataSource ID="SqlDataSource_Editor" runat="server"
            ConnectionString="<%$ ConnectionStrings:DWHConnectionString3 %>" 
            SelectCommand="SELECT DISTINCT [Editor] FROM [Rejection_Data] ORDER BY [Editor]"></asp:SqlDataSource>
 
    <asp:SqlDataSource ID="SqlDataSource_Distributor" runat="server"
            ConnectionString="<%$ ConnectionStrings:DWHConnectionString3 %>" 
            SelectCommand="SELECT DISTINCT [Distributor] FROM [Rejection_Data] ORDER BY [Distributor]"></asp:SqlDataSource>
 
    <asp:SqlDataSource ID="SqlDataSource_TVA" runat="server"
            ConnectionString="<%$ ConnectionStrings:DWHConnectionString3 %>" 
            SelectCommand="SELECT DISTINCT [TVA] FROM [Rejection_Data] ORDER BY [TVA]"></asp:SqlDataSource>
 
    <asp:SqlDataSource ID="SqlDataSource_DISP" runat="server"
            ConnectionString="<%$ ConnectionStrings:DWHConnectionString3 %>" 
            SelectCommand="SELECT DISTINCT [DISP] FROM [Rejection_Data] ORDER BY [DISP]"></asp:SqlDataSource>
 
    <asp:SqlDataSource ID="SqlDataSource_Intergrate_date" runat="server"
            ConnectionString="<%$ ConnectionStrings:DWHConnectionString3 %>" 
            SelectCommand="SELECT DISTINCT [Integrate_date] FROM [Rejection_Data] ORDER BY [Integrate_date] DESC"></asp:SqlDataSource>
 
    <asp:SqlDataSource ID="SqlDataSource_File_Name" runat="server"
            ConnectionString="<%$ ConnectionStrings:DWHConnectionString3 %>" 
            SelectCommand="SELECT DISTINCT [File_Name] FROM [Rejection_Data] ORDER BY [File_Name]"></asp:SqlDataSource>
 
    <div style="vertical-align:top; height:600px; width:100%; overflow:auto;">
 
        <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" 
        BackColor="#CCCCCC" DataSourceID="SqlDataSource1"  BorderColor="#CCCCCC" 
            BorderStyle="None" BorderWidth="1px" 
                        CellPadding="3" CellSpacing="2" Width="100%">
 
            <Columns>
                <asp:BoundField DataField="EAN" HeaderText="EAN" SortExpression="EAN" />
                <asp:BoundField DataField="Editor" HeaderText="Editor" 
                    SortExpression="Editor" />
                <asp:BoundField DataField="Distributor" HeaderText="Distributor" 
                    SortExpression="Distributor" />
                <asp:BoundField DataField="TVA" HeaderText="TVA" SortExpression="TVA" />
                <asp:BoundField DataField="DISP" HeaderText="DISP" SortExpression="DISP" />
                <asp:BoundField DataField="Integrate_date" HeaderText="Integrate_date" 
                    SortExpression="Integrate_date" />
                <asp:BoundField DataField="File_Name" HeaderText="File_Name" 
                    SortExpression="File_Name" />
            </Columns>
 
        <FooterStyle BackColor="#F7DFB5" ForeColor="#0099CC" />
        <HeaderStyle BackColor="#0099CC" Font-Bold="True" ForeColor="White" />
        <RowStyle BackColor="White" Font-Bold="True" ForeColor="Black" />
        <SelectedRowStyle BackColor="#738A9C" Font-Bold="True" ForeColor="White" />
        <SortedAscendingCellStyle BackColor="White" Font-Bold="True" />
        <SortedAscendingHeaderStyle BackColor="#0099CC" />
        <SortedDescendingCellStyle BackColor="White" />
        <SortedDescendingHeaderStyle BackColor="#0099CC" />
    </asp:GridView>
 
    <asp:SqlDataSource ID="SqlDataSource1" runat="server" 
        ConnectionString="<%$ ConnectionStrings:DWHConnectionString3 %>" 
        SelectCommand="SELECT [EAN], [Editor],
            [Distributor], [TVA], [DISP], 
            [Integrate_date], [File_Name]
            FROM [Rejection_Data]" 
            FilterExpression="[EAN] like '{0}%' and [Editor] like '{1}%' and
            [Distributor] like '{2}%' and [TVA] like '{3}%' and
            [DISP] like '{4}%' and [Integrate_date] like '{5}%' and
            [File_Name] like '{6}%'">
        <FilterParameters>
                <asp:ControlParameter ControlID="DropDownList1" Name="EAN" PropertyName="SelectedValue" ConvertEmptyStringToNull="false"/>
                <asp:ControlParameter ControlID="DropDownList2" Name="Editor" PropertyName="SelectedValue" ConvertEmptyStringToNull="false"/>
                <asp:ControlParameter ControlID="DropDownList3" Name="Distributor" PropertyName="SelectedValue" ConvertEmptyStringToNull="false"/>
                <asp:ControlParameter ControlID="DropDownList4" Name="TVA" PropertyName="SelectedValue" ConvertEmptyStringToNull="false"/>
                <asp:ControlParameter ControlID="DropDownList5" Name="DISP" PropertyName="SelectedValue" ConvertEmptyStringToNull="false"/>
                <asp:ControlParameter ControlID="DropDownList6" Name="Integrate_date" PropertyName="SelectedValue" ConvertEmptyStringToNull="false"/>
                <asp:ControlParameter ControlID="DropDownList7" Name="File_Name" PropertyName="SelectedValue" ConvertEmptyStringToNull="false"/>
            </FilterParameters>
    </asp:SqlDataSource>
 
    </div>
</div>
</asp:Content>
Je n'ai pas d'erreur de compilation mais les listes de trient pas, et rien est affiché quand tout est à "All".

Pourriez-vous me dire ce qui ne va pas dans le code ?
Merci d'avance pour vos réponses !