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Karthik Mani
589
Async request failed error
posted

Hi 

I've added the Webdata grid in the ASPX (vb.net) page and here is the code snippet of the source page (HTML)

<html xmlns="http://www.w3.org/1999/xhtml">

<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>

</div>
<asp:Button ID="Button1" runat="server" Text="Button" />
<ig:WebDataGrid ID="WebDataGrid1" runat="server" Height="350px" Width="400px">
<Behaviors>
<ig:Selection CellClickAction="Row">
<AutoPostBackFlags CellSelectionChanged="True" ColumnSelectionChanged="True" 
RowSelectionChanged="True" />
</ig:Selection>
<ig:RowSelectors>
</ig:RowSelectors>
<ig:Activation>
</ig:Activation>
<ig:EditingCore>
</ig:EditingCore>
</Behaviors>
</ig:WebDataGrid>
<ig:WebScriptManager ID="WebScriptManager1" runat="server">
</ig:WebScriptManager>
</form>
</body>
</html>

 

In the code behind, the code snippet is 

 

Public Class personXXX
Public name As String
Public age As Int16
Public gender As String
Public status As Boolean
Public State As String
End Class

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

If Not Page.IsPostBack Then

WebDataGrid1.EnableDataViewState = True
BuildGrid()

Else

End If

End Sub
Private Sub BuildGrid()

Dim dataTab As New DataTable
Dim colDB As New DataColumn
Dim objRow As DataRow

WebDataGrid1.Rows.Clear()

colDB = New DataColumn("RowID", Type.GetType("System.Int16"))
dataTab.Columns.Add(colDB)

colDB = New DataColumn("Name", Type.GetType("System.String"))
dataTab.Columns.Add(colDB)

colDB = New DataColumn("Age", Type.GetType("System.Int16"))
dataTab.Columns.Add(colDB)

colDB = New DataColumn("Gender", Type.GetType("System.String"))
dataTab.Columns.Add(colDB)

colDB = New DataColumn("Status", Type.GetType("System.Boolean"))
dataTab.Columns.Add(colDB)

colDB = New DataColumn("State", Type.GetType("System.String"))
dataTab.Columns.Add(colDB)

Dim per1 As New personXXX With { _
.name = "Eliza", _
.age = 27, _
.gender = "Female", _
.State = "CA", _
.status = True
}
Dim per2 As New personXXX With { _
.name = "Sarah", _
.age = 22, _
.gender = "Female", _
.State = "GA", _
.status = True
}
Dim per3 As New personXXX With { _
.name = "ema", _
.age = 22, _
.gender = "Female", _
.State = "MD", _
.status = False
}
Dim per4 As New personXXX With { _
.name = "rachel", _
.age = 20, _
.gender = "Female", _
.State = "MD", _
.status = True
}
Dim per6 As New personXXX With { _
.name = "jim", _
.age = 22, _
.gender = "Male", _
.State = "MD", _
.status = True
}
Dim per5 As New personXXX With { _
.name = "jack", _
.age = 32, _
.gender = "Male", _
.State = "CA", _
.status = True
}

 

Dim personArr As personXXX() = {New personXXX(), per1, per2, per3, per4, per5, per6}

For introw = 1 To 6
objRow = dataTab.NewRow()
objRow(0) = introw
objRow(1) = personArr(introw).name.ToString
objRow(2) = Integer.Parse(personArr(introw).age)
objRow(3) = personArr(introw).gender.ToString
objRow(4) = personArr(introw).status
objRow(5) = personArr(introw).State
dataTab.Rows.Add(objRow)
Next

WebDataGrid1.DataSource = dataTab
WebDataGrid1.DataBind()
End Sub

 

When I click on the checkbox in the grid, I get an error, see attached.

Any help?

  • 29417
    Offline posted

    Hello Karthik ,

     

    I’m just following up to see if you’ve been able to resolve your issue. If you have any questions or concerns or if you need further assistance please let me know.

     

    Best Regards,

    Maya Kirova

    Developer Support Engineer

    Infragistics, Inc.

    http://ko.infragistics.com/support

     

  • 29417
    Offline posted

    Hello Karthik ,

     

    Thank you for posting in our forum.

     

    As the error suggests you need to set for the grid the DataKeyFields property in order to be able to update values in the grid.

    Generally the DataKeyFields should match the primary key of the collection you’re binding them to and should be unique for each record.

    You could set in this case the RowID as the primary key of your data table and then set that in the DataKeyFields property of the grid.

     

    Let me know if you have any questions or concerns.

     

    Best Regards,

    Maya Kirova

    Developer Support Engineer II

    Infragistics, Inc.

    http://ko.infragistics.com/support