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[CLOSED] Datepickerfield error

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  1. #1
    Sep 11, 2017, 3:43 PM

    [CLOSED] Datepickerfield error

    Hi I am having a problem with the Datepickerfield control.

    If i place one on my page i am getting an error as follows...
    System.Web.HttpUnhandledException (0x80004005): Exception of type 'System.Web.HttpUnhandledException' was thrown. ---> System.NullReferenceException: Object reference not set to an instance of an object. at Ext.Net.Mobile.DatePickerFieldBase.set_RawValue(Ob ject value) at Ext.Net.Mobile.DatePickerFieldBase.LoadPostData(St ring postDataKey, NameValueCollection postCollection) at Ext.Net.Mobile.Field.System.Web.UI.IPostBackDataHa ndler.LoadPostData(String postDataKey, NameValueCollection postCollection) at System.Web.UI.Page.ProcessPostData(NameValueCollec tion postData, Boolean fBeforeLoad) at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) at System.Web.UI.Page.HandleError(Exception e) at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) at System.Web.UI.Page.ProcessRequest() at System.Web.UI.Page.ProcessRequestWithNoAssert(Http Context context) at System.Web.UI.Page.ProcessRequest(HttpContext context) at ASP.admin_mobile_flexmobile_aspx.ProcessRequest(Ht tpContext context) at System.Web.HttpApplication.CallHandlerExecutionSte p.System.Web.HttpApplication.IExecutionStep.Execut e() at System.Web.HttpApplication.ExecuteStep(IExecutionS tep step, Boolean& completedSynchronously)


    I am not even trying to set a date on it.
    It happens on page load and every subsequent direct event triggers the same error.
    If i put it on a blank page it seems ok so it must be clashing with something on my page.

    I have tried removing numerous things from page without success.
    My page is too big to post so just wondering if you know anything about this error.

    Also on the empty page where it does load if i try to set a date on it from page load it throws an error also saying object can't be found.

    Thanks
    Last edited by fabricio.murta; Dec 01, 2017 at 5:16 PM. Reason: no feedback from the user in 7+ days
  2. #2
    Sep 11, 2017, 5:17 PM
    Hello @Fergus!

    We don't know about this issue, as we have an example that uses the date field without issues here: http://mobile.ext.net/#demo/formpanel

    There should indeed be some library competing with Ext.NET Mobile and breaking the component.

    Hope this helps!
    Fabrício Murta
    Developer & Support Expert
    Ext.NETASP.NET UI Component framework
    RetypeDocumentation website generator
    MojeeLightning fast Emoji library for .NET
    Ext.NET Examples|Ext.NET API Docs|ExtJS API Docs|Twitter
  3. #3
    Sep 11, 2017, 5:34 PM
    As you can see from this example when you click on the button it throws an error.

    Even though the direct event is empty.
    Even if i set visible=false for the datepickerfield it is still the same.

    <%@ Page Language="VB" AutoEventWireup="false" CodeFile="TestGridPanel.aspx.vb" Inherits="Admin_Mobile_TestGridPanel" %>

<%@ Register Assembly="Ext.Net.Mobile" Namespace="Ext.Net.Mobile" TagPrefix="ext" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
        <ext:ResourceManager runat="server" AjaxTimeout="60000" ScriptMode="Debug" InitScriptMode="Linked"></ext:ResourceManager>
        <ext:Viewport runat="server">
            <Items>
                <ext:Toolbar runat="server" Docked="Top">
                    <Items>
                        <ext:Button runat="server" Text="Update" ID="btn1">
                            <DirectEvents>
                                <Tap OnEvent="ListUsers">
                                    <EventMask ShowMask="true"></EventMask>
                                </Tap>
                            </DirectEvents>
                        </ext:Button>
                        <ext:DatePickerField
                            runat="server" DateFormat="d"
                            DestroyPickerOnHide="true"
                            Name="date"
                            Label="Start Date">
                            <Picker runat="server" YearFrom="1990" DateValue="2016-06-24" />
                        </ext:DatePickerField>
                        
                    </Items>
                </ext:Toolbar>


            </Items>
        </ext:Viewport>

    </form>
</body>
</html>
    Partial Class Admin_Mobile_TestGridPanel
    Inherits System.Web.UI.Page

    Private Sub Admin_Mobile_TestGridPanel_Load(sender As Object, e As EventArgs) Handles Me.Load
        listUsers(Nothing, Nothing)

        'dpf1.SetValue(Date.Now)
        btn1.SetText("hello")
    End Sub

    Protected Sub listUsers(sender As Object, e As DirectEventArgs)

    End Sub


End Class
  4. #4
    Sep 13, 2017, 12:38 AM
    Hello, @Fergus!

    Your code has an error where you bind the Tap event. You are using ListUsers where you defined an listUsers method. Notice the lowercase.

    When I fixed that error I could load the page and click the button, no error happens at all on my side.
    Fabrício Murta
    Developer & Support Expert
    Ext.NETASP.NET UI Component framework
    RetypeDocumentation website generator
    MojeeLightning fast Emoji library for .NET
    Ext.NET Examples|Ext.NET API Docs|ExtJS API Docs|Twitter
  5. #5
    Sep 13, 2017, 7:51 AM
    Hi,
    Thanks for pointing that out. But still the same error here.

    I have changed both references to ListUsers.

    I am using Latest version of chrome with the downloaded ext.net 4.4 dlls.

    Click image for larger version.  Name: ExtNetDatepickerField.JPG  Views: 120  Size: 42.1 KB  ID: 25043

    When i click on the button the error happens and also the text in the datepicker at the bottom becomes smaller.

    Strange you are not getting same error.

    I attach new code with an alert statement. If you expand the datepicker field first then click the button.

    Tried testing in Firefox but neither button or datefield react to click.

    <%@ Page Language="VB" AutoEventWireup="false" CodeFile="TestGridPanel.aspx.vb" Inherits="Admin_Mobile_TestGridPanel" %>

<%@ Register Assembly="Ext.Net.Mobile" Namespace="Ext.Net.Mobile" TagPrefix="ext" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
        <ext:ResourceManager runat="server" AjaxTimeout="60000"></ext:ResourceManager>
        <ext:Viewport runat="server">
            <Items>
                <ext:Toolbar runat="server" Docked="Top">
                    <Items>
                        <ext:Button runat="server" Text="Update" ID="btn1">
                            <DirectEvents>
                                <Tap OnEvent="ListUsers">
                                    <EventMask ShowMask="true"></EventMask>
                                </Tap>
                            </DirectEvents>
                        </ext:Button>
                        <ext:DatePickerField runat="server" >
<%--                            <Picker runat="server" YearFrom="1990" DateValue="2016-06-24" />--%>
                        </ext:DatePickerField>
                        
                    </Items>
                </ext:Toolbar>


            </Items>
        </ext:Viewport>

    </form>
</body>
</html>
    Imports Ext.Net.Mobile

Partial Class Admin_Mobile_TestGridPanel
    Inherits System.Web.UI.Page

    Private Sub Admin_Mobile_TestGridPanel_Load(sender As Object, e As EventArgs) Handles Me.Load
        'listUsers(Nothing, Nothing)

        'dpf1.SetValue(Date.Now)
        btn1.SetText("hello")
    End Sub

    Protected Sub ListUsers(sender As Object, e As DirectEventArgs)
        Ext.Net.Mobile.X.Msg.Alert("", "test").Show()

    End Sub
    Thanks
  6. #6
    Sep 13, 2017, 7:54 AM
    If you do not see the error i wonder if this has something to do with me using a touch screen laptop.
    I remember it causing other problems before.

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