Hi Daniil,
I finally managed to produce an example. I think the cause is the autorender option i use:
<%@ Page Language="VB" AutoEventWireup="false" Culture="auto" uiculture="auto" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script runat="server">
<DirectMethod()> _
Public Sub LoadStore1()
Me.Store1.Reload()
Me.Window1.Show()
End Sub
Protected Sub Store1_Read(ByVal Sender As Object, ByVal e As StoreReadDataEventArgs)
Dim _Data As New System.Data.DataTable
Dim _DataRow As System.Data.DataRow
Dim _Index01 As Integer
_Data.Columns.Add(New System.Data.DataColumn("ID", GetType(Integer)))
_Data.Columns.Add(New System.Data.DataColumn("DisplayName", GetType(System.String)))
For _Index01 = 0 To 10
_DataRow = _Data.NewRow()
_DataRow("ID") = _Index01
_DataRow("DisplayName") = String.Concat("DisplayName" & _Index01)
_Data.Rows.Add(_DataRow)
Next
Me.Store1.DataSource = _Data
Me.Store1.DataBind()
End Sub
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<ext:ResourceManager ID="ResourceManager1" runat="server" DirectMethodNamespace="ParentMethods" />
<ext:Button ID="btnLoad" runat="server" Text="LoadStore">
<Listeners>
<Click Handler="ParentMethods.LoadStore1();" />
</Listeners>
</ext:Button>
<ext:Window ID="Window1" runat="server"
Title="Gridpanel Mask"
Width="730px"
Height="630px"
Resizable="False"
Closable="False"
Modal="True"
layout="FormLayout"
BodyPadding="10"
AutoRender="False">
<Items>
<ext:GridPanel ID="GridPanel1" runat="server" Height="400">
<Store>
<ext:Store runat="server" ID="Store1" OnReadData="Store1_Read" AutoLoad="false" >
<Model>
<ext:Model runat="server" IDProperty="ID">
<Fields>
<ext:ModelField Name="DisplayName" />
<ext:ModelField Name="ID" />
</Fields>
</ext:Model>
</Model>
</ext:Store>
</Store>
<ColumnModel>
<Columns>
<ext:Column ID="colDisplayName" runat="server" DataIndex="DisplayName" Text="DisplayName" Flex="1" />
</Columns>
</ColumnModel>
</ext:GridPanel>
</Items>
</ext:Window>
</div>
</form>
</body>
</html>