子Gridview中不存在Dropdownlist控件的OnSelectedIndexChanged事件

Question

I have parent gridview and child gridview, In child gridview I have one dropdown list, I need to fire the onselectedindexchanged event for that drop down but it is not firring because it is existed in the child gridview. If I place that dropdown in parent gridview then that selectedindexchanged is firing but I want to place that dropdown in child gridview and need to fire onselectedindexchanged event when user change the dropdown list value . In the below gridview image you can see the Status column in child gridview. It contains dropdown now I want to fire that dropdown seleted index changed event in code behind.

<asp:GridView ID="gvCountry" runat="server" AutoGenerateColumns="false">
 <Columns>
                            <asp:TemplateField>
                                <ItemTemplate>
                                    <img alt="" id="imgsymbol" style="cursor: pointer" src="images/plus.png" />
                                    <asp:Panel ID="pnlOrders" runat="server" Style="display: none">
                                        <asp:GridView ID="gvBrokerdetails" runat="server" AutoGenerateColumns="false" CssClass="mGrid" OnRowCommand="gvBrokerdetails_RowCommand"
                                            AlternatingRowStyle-CssClass="alt" PagerStyle-CssClass="pgr" GridLines="None" AllowPaging="true">
                                            <Columns>
                                                <asp:BoundField DataField="BrokerName" HeaderText="Name" />
                                                <asp:TemplateField HeaderText="Status">
                                                    <ItemTemplate>
                                                        <asp:DropDownList ID="ddlStatus" runat="server" OnSelectedIndexChanged="ddlStatus_SelectedIndexChanged" AutoPostBack="true">
                                                            <asp:ListItem Text="Include" Value="0"></asp:ListItem>
                                                            <asp:ListItem Text="Exclude" Value="1"></asp:ListItem>
                                                        </asp:DropDownList>
                                                    </ItemTemplate>
                                                </asp:TemplateField>
                                                <asp:TemplateField HeaderText="Delete">
                                                    <ItemTemplate>
                                                        <asp:ImageButton ID="imgBtnDeleteRow" runat="server" Width="25px" Height="25px" CommandName="CrossImageButton" CommandArgument='<%#Eval("BrokerId")%>' ImageUrl="~/images/cross-button.png" />
                                                    </ItemTemplate>
                                                </asp:TemplateField>
                                            </Columns>
                                        </asp:GridView>
                                    </asp:Panel>
                                </ItemTemplate>
                            </asp:TemplateField>
                            <asp:BoundField DataField="CountryName" HeaderText="Country Name" />
                        </Columns>
                    </asp:GridView>

CodeBehind:

public void ddlStatus_SelectedIndexChanged(object sender, EventArgs e)
    {

    }

But the above is event is not calling. Is there any other process to achieve or I need to specify any new property in the code.

Answer 1

Find your gridview inside the RowDataBound Event of parent gridview

protected void gvCountry_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if(e.Row.RowType == DataControlRowType.DataRow)
    {
        GridView mygrid = e.Row.FindControl("gvBrokerdetails") as GridView;
    }
}

than handle the event of mygrid it is your child grid you can handle any event you want or assign any property to it. an example of Selected_IndexChanged is below

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        GridView mygrid = e.Row.FindControl("gvBrokerdetails") as GridView;
        mygrid.SelectedIndexChanged += new EventHandler(mygrid_SelectedIndexChanged);
    }
}

void mygrid_SelectedIndexChanged(object sender, EventArgs e)
{
     // Write your code here
}