c# - AsyncPostback Trigger - Textbox value not getting sent back -

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my updatepanel

 <form id="form1" runat="server">          <asp:scriptmanager id="scriptmanager1" runat="server"      enablepagemethods="true"></asp:scriptmanager> <asp:updatepanel id="up1" updatemode="conditional"      runat="server" childrenastriggers="false">     <triggers>         <asp:asyncpostbacktrigger controlid="txtname"              eventname="textchanged"/>     </triggers>     <contenttemplate>         <asp:textbox id="txtname" runat="server"            autopostback="true" ontextchanged="txtname_textchanged" />         <asp:textbox id="txtphone" runat="server" autopostback="true" />     </contenttemplate> </asp:updatepanel>     </form>

why isn't value of textbox (txtname) getting sent server when loses focus? async postback happens no value.

eventname should eventname="textchanged".

textchanged default textbox control, don't need set it.

asyncpostbacktrigger.eventname property

<asp:scriptmanager id="scriptmanager1" runat="server"      enablepagemethods="true"></asp:scriptmanager> <asp:updatepanel id="up1" updatemode="conditional"      runat="server" childrenastriggers="false">     <triggers>         <asp:asyncpostbacktrigger controlid="txtname"              eventname="textchanged"/>     </triggers>     <contenttemplate>         <asp:textbox id="txtname" runat="server"            autopostback="true" ontextchanged="txtname_textchanged" />         <asp:textbox id="txtphone" runat="server" autopostback="true" />     </contenttemplate> </asp:updatepanel>

code behind

protected void txtname_textchanged(object sender, eventargs e) {     string name = txtname.text; }

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