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I have two dropdown ddlCountry and ddlState and one button Submit.

While ddlstate is in update panelwhile ddlstate is in update panel.

On submit of button value of both dropdown store in database.

And I show the data in Repeater Control.(In HTML Table structure)
ASPX CODE
XML
<table id="tablelist" class="csstablelist" cellspacing="1" cellpadding="1">
                    <tr>
                        <td class="csstablelisttoptr">
                            ddlCountryID
                        </td>
                        <td class="csstablelisttoptr">
                            ddlCountryText
                        </td>
                        <td class="csstablelisttoptr">
                            ddlstateText
                        </td>
                    </tr>
                    <asp:Repeater ID="repeaterList" runat="server" OnItemDataBound="repeaterList_ItemDataBound">
                        <ItemTemplate>
                            <tr onclick="selectRow(this);">
                                <td class="csstablelisttd" style="display: none">
                                    <asp:Label ID="ddlCountryID" runat="server" Text='<%#Eval("ddlCountryID")%>'></asp:Label>
                                </td>
                                <td class="csstablelisttd">
                                    <asp:Label ID="ddlCountryText" runat="server" Text='<%#Eval("ddlCountryText")%>'></asp:Label>
                                </td>
                                <td class="csstablelisttd">
                                    <asp:Label ID="ddlstateText" runat="server" Text='<%#Eval("ddlstateText")%>'></asp:Label>
                                </td>
                            </tr>
                        </ItemTemplate>
                    </asp:Repeater>
                </table>


XML
<asp:DropDownList ID="ddlCountry" runat="server" CssClass="csstextbox" Width="207px" AutoPostBack="true" OnSelectedIndexChanged="ddlCountry_SelectedIndexChanged">
</asp:DropDownList>
<asp:UpdatePanel ID="updatePanelState" runat="server">
    <ContentTemplate>
        <asp:DropDownList ID="ddlState " runat="server" CssClass="csstextbox" Width="177px">
        </asp:DropDownList>
    </ContentTemplate>
    <Triggers>
        <asp:AsyncPostBackTrigger ControlID="ddlCountry" EventName="SelectedIndexChanged" />
    </Triggers>
</asp:UpdatePanel>
<asp:Button ID="btnSave" runat="server" Width="80px" OnClientClick="return validateForm();" Text="Save" CssClass="cssbutton" OnClick="btnSave_Click" />



ddlCountryID | ddlCountryText | ddlstateText
1            | USA            | XYZ
2            |India           | PQR


Onclick of TR i write below (SelectRow(this)) function in javascript for highliting the repeater value and dropdown value match and getting selected.
JavaScript
<pre lang="Javascript">function selectRow(objTR)
{
    for (i = 0; i < ddlCountry .options.length; i++)
    {
        if (ddlCountry .options[i].text == objTR.cells[1].innerText.trim())
            break;
    }           
    ddlCountry .options[i].selected = true;

    __doPostBack(ddlCountry .id, objTR.cells[2].innerText.trim());    
}


I write ddlCountry SelectedIndexChangedEvent In code behind.

From Javascript I am firing __doPostBack() and passing ddlCountry as event target ddlStateText as event argument to SelectedIndexChangedEvent and getting value in event like this.
JavaScript
string stateDescription = Request["__EVENTARGUMENT"];
ddlState .Items.FindByText(stateDescription ).Selected = true;//for highliting the repeater value and dropdown value match and selected


My problem is if I have following repeater data.

ddlCountryID | ddlCountryText | ddlstateText
1            | USA            | XYZ
2            |India           | PQR
2            |India           | MNO


When I select row number 3 that have country india and state mno then __dopostback() method is fire.


When I goes to row number 1 then __dopostback() method is fire.

When I come from row nuber 1 to 3 then method is fire correct way but when goes from row nuber 3 to 2 having country id same __dopostback() method is not fire and state is not selected from ddlstate.
Posted
Updated 25-May-12 10:06am
v15
Comments
Jim Jos 25-May-12 7:22am    
Not sure why you need to use _dopostback which is not meant for calling by programmers!! Could you cut and paste the entire code?
[no name] 25-May-12 7:25am    
@JimJos:I am using postback for highliting the repeater cell value and dropdown value match and getting selected and after that i have to edit ddlcountry text or ddlstate text and fire update query. In my case __doPostback is necessary above code is the current scenario
Jim Jos 25-May-12 8:28am    
No probs.. If you put your entire code I ll able be understand your requirement. Rightnow it is still confusing..
[no name] 25-May-12 8:42am    
I HAVE UPDATED MY FULL SOURCE CODE SEE ABOVE
Jim Jos 25-May-12 9:02am    
Sorry to bother you agian! but the code is incomplete! I need to simulate your app to give you a better result!!

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