Repeater ItemCommand Doesnt fire

I have tried post on same subject but didn't work. it didn't actually fire event

What I want

I want to fire ItemCommand event when some one click on repeater.

Issue

The ItemCommand is not fired.

EnableViewState=true

Here is by code:

Html:

<table>
              <asp:Repeater ID="outerRepeater" runat="server"
                    OnItemDataBound="outer_OnitemdataBound" 
                  onitemcommand="outerRepeater_ItemCommand">
                <ItemTemplate>
                <asp:Repeater ID="Rgallery" runat="server">
                    <ItemTemplate>
                      <%# (Container.ItemIndex + 4) % 4 == 0 ? "<tr>" : string.Empty %>  
                        <td>
                            <img src="<%# Eval("ImgPath") %>" style="height:300px; width:300px;" alt="" />
                                <div class="caption">
                         <h3><%# Eval("Type") %></h3>
                         <p><b><%# Eval("SubType") %></b></p>
                         <p{font-family: "Comic Sans MS", cursive, sans-serif; font-size: 25px}>Price:<i class="fa fa-inr fa-fw"><%# Eval("Price") %></i></p>
                         <p><asp:Button ID="btnBuy" CommandName="Buy" CommandArgument="Add to Cart" class="btn btn-primary" Text='<%# DataBinder.Eval(Container.DataItem, "Price") %>' runat="server" />
                         </p>
                        </div>
                        </td>
                        <%# (Container.ItemIndex + 4) % 4 == 3 ? "</tr>" : string.Empty%>
                    </ItemTemplate>
                </asp:Repeater>
                </ItemTemplate>
              </asp:Repeater>
              <asp:Label ID="lblStatus" runat="server" ></asp:Label>
    </table>

and here is code behind

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        DataTable dummy = new DataTable();
        dummy.Columns.Add();
        dummy.Rows.Add();
        rptMain.DataSource = dummy;
        rptMain.DataBind();
        outerRepeater.DataSource = dummy;
        outerRepeater.DataBind();
    }
    if (Page.IsPostBack)
    { return; }

}

protected void outerRepeater_ItemCommand(object source, RepeaterCommandEventArgs e)
{
    // Here is a code I want to fire
}
protected void outer_OnitemdataBound(object sender, RepeaterItemEventArgs e)
{
    Repeater repeater = e.Item.FindControl("RGallery") as Repeater;
    repeater.DataSource = db.GetTable("SELECT `Did`, `Type`, `SubType`, `Gender`, `Price`, `ImgPath` FROM `designs` ORDER BY `Did` DESC");
    repeater.DataBind();
}

What i have tried so far

Method 1

I have put onItemCommand="rptthumbnail_ItemCommand" But i didn't worked.

Method 2 I have add handlar in OnInit() But i didn't worked too.

Can some please identify that what's the problem Please help me with this.....

Because your button is the child of your inner repeater, it will trigger the ItemCommand event on that instead. Moving the event binding down to that repeater should fix it for you.

<asp:Repeater ID="outerRepeater" runat="server"
    OnItemDataBound="outer_OnitemdataBound">
    <ItemTemplate>
        <asp:Repeater ID="Rgallery" runat="server"
            OnItemCommand="Rgallery_ItemCommand">

protected void Rgallery_ItemCommand(object source, RepeaterCommandEventArgs e)
{
    // Here is a code I want to fire
}