What's New?

NullReferenceException when using ServerMapping

  1. #1
    Feb 09, 2011, 9:52 AM

    NullReferenceException when using ServerMapping

    Hi,

    I'm using ServerMapping on RecordFields for complex objects. I specified a property that doesn't exist. This threw a NullReferenceException when the data was being bound.
    It took me a while to check why there is the exception. I think it should throw a more detailled exception that tells me that the property does not exist.

    public abstract partial class StoreDataBound
    Name: 1.png Views: 361 Size: 14.1 KB
  2. #2
    Feb 17, 2011, 8:39 AM
    Hi,

    Please clarify how we can reproduce it?

    I set non-existing property for ServerMapping but the issue doesn't appear.

    Example
    <%@ Page Language="C#" %>

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

<script runat="server">
    class Test
    {
        public string Test1 { get; set; }
        public string Test2 { get; set; }
    }

    protected void Page_Load(object sender, EventArgs e)
    {
        if (!X.IsAjaxRequest)
        {
            Store store = this.GridPanel1.GetStore();
            store.DataSource = new object[] 
            { 
                new Test 
                { 
                    Test1 = "test11", 
                    Test2 = "test12"
                },
            };
            store.DataBind();
        }
    }
</script>

<!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>Ext.Net Example</title>
</head>
<body>
    <form runat="server">
    <ext:ResourceManager runat="server" />
    <ext:GridPanel ID="GridPanel1" runat="server" AutoHeight="true">
        <Store>
            <ext:Store runat="server">
                <Reader>
                    <ext:JsonReader>
                        <Fields>
                            <ext:RecordField Name="test11" ServerMapping="Test1" />
                            <ext:RecordField Name="test2" ServerMapping="notExists" />
                        </Fields>
                    </ext:JsonReader>
                </Reader>
            </ext:Store>
        </Store>
        <ColumnModel runat="server">
            <Columns>
                <ext:Column Header="Test1" DataIndex="test1" />
                <ext:Column Header="Test2" DataIndex="test2" />
            </Columns>
        </ColumnModel>
    </ext:GridPanel>
    </form>
</body>
</html>
  3. #3
    Feb 17, 2011, 8:46 AM
    Try specifying a nested property:

    class Test
{
    public Test2 Test1 { get; set; }
    public string Test2 { get; set; }
}

class Test2
{
    public string NestedTest1 { get; set; }
}
    <ext:RecordField Name="test2" ServerMapping="Test1.NestedTest1" /> // works
<ext:RecordField Name="test2" ServerMapping="Test1.notExists" /> // Exception
  4. #4
    Feb 17, 2011, 8:55 AM
    Thank you, now I reproduced.

    I will discuss this issue with Dev team.

    Example
    <%@ Page Language="C#" %>

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

<script runat="server">
    class Test
    {
        public Test2 Test1 { get; set; }
        public string Test2 { get; set; }
    }

    class Test2
    {
        public string NestedTest1 { get; set; }
    }

    protected void Page_Load(object sender, EventArgs e)
    {
        if (!X.IsAjaxRequest)
        {
            Store store = this.GridPanel1.GetStore();
            store.DataSource = new object[] 
            { 
                new Test 
                { 
                    Test1 = new Test2() 
                    {
                      NestedTest1 = "test11" 
                    }, 
                    Test2 = "test12"
                },
            };
            store.DataBind();
        }
    }
</script>

<!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>Ext.Net Example</title>
</head>
<body>
    <form runat="server">
    <ext:ResourceManager runat="server" />
    <ext:GridPanel ID="GridPanel1" runat="server" AutoHeight="true">
        <Store>
            <ext:Store runat="server">
                <Reader>
                    <ext:JsonReader>
                        <Fields>
                            <ext:RecordField Name="test1" ServerMapping="Test1.NestedTest1" />
                            <ext:RecordField Name="test2" ServerMapping="Test1.notExists" />
                        </Fields>
                    </ext:JsonReader>
                </Reader>
            </ext:Store>
        </Store>
        <ColumnModel runat="server">
            <Columns>
                <ext:Column Header="Test1" DataIndex="test1" />
                <ext:Column Header="Test2" DataIndex="test2" />
            </Columns>
        </ColumnModel>
    </ext:GridPanel>
    </form>
</body>
</html>
  5. #5
    Feb 17, 2011, 8:59 AM
    I love it to enhance things :)
  6. #6
    May 20, 2011, 1:20 PM
    Hi @nextSTEP,

    The related feature ticket:
    https://extnet.lighthouseapp.com/pro...res/tickets/91

    This has been implemented, revision #3570.

    It will be also available in RC2.

    Thanks for pointing it out.

Similar Threads

  1. DirectMethod NullReferenceException
    By bayoglu in forum 1.x Help
    Replies: 2
    Last Post: Apr 04, 2012, 4:26 PM
  2. [CLOSED] System.NullReferenceException
    By syllabusarq in forum 1.x Legacy Premium Help
    Replies: 8
    Last Post: Mar 07, 2011, 9:15 PM
  3. DirectMethod - NullReferenceException
    By grombox in forum 1.x Help
    Replies: 2
    Last Post: Dec 07, 2010, 5:34 AM
  4. [FIXED] [V0.8.2] NullReferenceException in ResourceManager.ProcessRequest
    By acrossdev in forum Bugs
    Replies: 1
    Last Post: Sep 04, 2009, 9:32 AM
  5. [FIXED] [V0.7] LoadPostData() results in NullReferenceException
    By disbell in forum Bugs
    Replies: 1
    Last Post: Dec 12, 2008, 1:10 PM

Posting Permissions