[Solved] invalid postback argument after custom filtering

[Mariusz]

Hi

I have radgrid with custom filtering:

<script type="text/javascript">

function IconsComboBoxChanging(sender, eventArgs) {

                var item = eventArgs.get_item();

                if (item != null) {

                    var input = sender.get_inputDomElement();

                    input.value = "";

                    input.defaultValue = "";

                }

            }

function DropDownFilterLoad(sender) {

                sender.set_text("");

                var itm = sender.get_items();

                var selected = itm.getItem(sender._selectedIndex);

                var img = selected.get_imageUrl();

                var input = sender.get_inputDomElement();

                SetBackground(input, img);

            }

</script>

<telerik:RadGrid ID="RadGrid1" runat="server" AllowFilteringByColumn="true" OnNeedDataSource="CorrectionsGrid_NeedDataSource" [...]>

[...]

    <Columns>

        <telerik:GridTemplateColumn UniqueName="CorrectStatus" HeaderText="Status" HeaderStyle-Width="55px" Resizable="false" DataField="CorrectionAcceptState">

            <ItemTemplate>

                <asp:Image [...] />

            </ItemTemplate>

            <FilterTemplate>

                <telerik:RadComboBox ID="StatusFiletCB" Width="45px" AppendDataBoundItems="true" DropDownWidth="205px" NoWrap="true" runat="server" OnSelectedIndexChanged="CorrectStatusFilterChange" AutoPostBack="true" AllowCustomText="false" OnClientSelectedIndexChanged="IconsComboBoxChanging" OnClientLoad="DropDownFilterLoad">

                    <Items>

                        <telerik:RadComboBoxItem Value="0"[...] />

                        <telerik:RadComboBoxItem Value="1"[...] />

                        <telerik:RadComboBoxItem  Value="2" [...] />

                    </Items>

                </telerik:RadComboBox>

            </FilterTemplate>

        </telerik:GridTemplateColumn>

<telerik:GridTemplateColumn AllowFiltering="false" UniqueName="ActionColumn" HeaderText="" HeaderStyle-Width="60px"

    Resizable="false" Visible="false">

    <ItemTemplate>

       <asp:ImageButton CommandName="Reject" runat="server" CommandArgument='<%# Eval("CorrId") %>' Visible='<%# this.IsUserAllowedToAccept() %>' [...] />

    </ItemTemplate>

</telerik:GridTemplateColumn>

    [...]

    </Columns>

</telerik:RadGrid>

Code behinde:

protected void CorrectionsGrid_NeedDataSource(object sender, Telerik.Web.UI.GridNeedDataSourceEventArgs e)
{
    CorrectionsGrid.DataSource = new MyDataContext().Corrections;
}

private int? GetValueOfCorrectionAcceptStateFilter()
{
    var regSearch = Regex.Match(CorrectionsGrid.MasterTableView.FilterExpression, @".*\(it\.CorrectionAcceptState = (?<filterVal>[1-3])\).*");
    if (regSearch.Success)
        return Int32.Parse(regSearch.Groups["filterVal"].Value);
    else
        return null;
}

protected void CorrectStatusFilterChange(object o, RadComboBoxSelectedIndexChangedEventArgs e)
{
    string filterExpression = CorrectionsGrid.MasterTableView.FilterExpression;

    var currentcFilter = GetValueOfCorrectionAcceptStateFilter();
    if (currentcFilter.HasValue)
        filterExpression = filterExpression.Replace("(it.CorrectionAcceptState = " + currentcFilter.Value + ")", string.Empty);

    if (Int32.Parse(e.Value) > 0)
        filterExpression = (filterExpression.Trim().Length > 0 ? filterExpression + " AND " : "")
                            + "(it.CorrectionAcceptState = " + e.Value + ")";
    CorrectionsGrid.MasterTableView.FilterExpression = filterExpression;
    CorrectionsGrid.MasterTableView.Rebind();
}

everything works fine until I set the filter and call out rejection - invalid postback or callback argument. where making a mistake?

[Maria Ilieva]

Hello Mariusz,

Please try to set "EnableLinqExpressions = false" for the RadGrid control and verify if this helps.

Regards,
Maria Ilieva
the Telerik team

[Mariusz]

I found solutions by changing javascript function DropDownFilterLoad
using sender.get_inputDomElement().value = "";  instead of sender.set_text(""); resolved issue.

thanks for tip