Help with retreiving text data with concatenate method

vcharles asked

on 2011-11-02

Hello,

I've made some progress with the code below, but I'm running into two issuse.

1. The value retrieved from the controls is for example c1Receiver.text insatead of the actual values displayed

2. The prgram only saves data to the last xml file in the string (i.e. Receiver.xml), but I need to save the text values of the controls to all the xml files that are part of curXYZ.

How do I solve those two issues?

Dim xyz() As String = New String() {"Manufacturer", "Receiver"}
        Dim i As Integer
        i = 0
        For i = 0 To 1
            Dim curXYZ = xyz(i)
            Dim MyFix As XDocument = XDocument.Load(Server.MapPath("~/App_Data/" & curXYZ & ".xml"))
            Dim xid As String
            xid = curXYZ & "_ID"
            Dim LargestFixID = (From el In MyFix.Descendants(curXYZ & "Table") Select CInt(el.<xid>.Value)).ToList
            LargestFixID.Sort()
            Dim xtable As String
            xtable = curXYZ & "Table"
            Dim xcontrol1 As String
            xcontrol1 = "Me.C1" & curXYZ & ".Text"
            Dim xcontrol As String
            xcontrol = "Me.C1" & curXYZ & ".Text.ToString"

            Dim CheckForItemFix = (From el In MyFix.Descendants(xtable).Elements(curXYZ) Select el.Value).ToList
            If Not CheckForItemFix.Contains(xcontrol1) Then
                Dim xNew As XElement = New XElement(xtable)
                xNew.Add(New XElement(xid, (LargestFixID.Last() + 1)))
                xNew.Add(New XElement(curXYZ, xcontrol1))
                MyFix.Root.Add(xNew)
                MyFix.Save(Server.MapPath("~/App_Data/" & curXYZ & ".xml"))
            End If

            Dim searchFix As String = xcontrol1
            Dim searchIdFix As String = Nothing
            Dim domFix As New XmlDocument()
            domFix.Load(Server.MapPath("~/App_Data/" & curXYZ & ".xml"))
            Dim listFix As XmlNodeList = domFix.SelectNodes("//" & xtable)
            If CheckForItemFix.Contains(xcontrol1) Then
                For Each node As XmlNode In listFix
                    If node(curXYZ).InnerText.Equals(searchFix) Then
                        searchIdFix = node(xid).InnerText
                        Exit For
                    End If
                Next
            End If
        Next

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Thanks,

Victor

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djon2003Senior software engineer

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Commented: 2011-11-02

Using xcontrol1 = "Me.C1" & curXYZ & ".Text" you are creating the string :
Me.C1Manufacturer.Text
and not getting the text of this control.
for that, use :
Me.Controls("C1" & curXYZ).Text

vcharles

Author

Commented: 2011-11-04

Thanks for the code , do you have a suggestion to solve the second issue?

I would like to avoid writing a separate If statement for MyFix for each value of curXYZ

If Not CheckForItemFix.Contains(xcontrol1) Then
Dim xNew As XElement = New XElement(xtable)
xNew.Add(New XElement(xid, (LargestFixID.Last() + 1)))
xNew.Add(New XElement(curXYZ, xcontrol1))
MyFix.Root.Add(xNew)
MyFix.Save(Server.MapPath("~/App_Data/" & curXYZ & ".xml"))
End If

djon2003Senior software engineer

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Commented: 2011-11-04

Do another For surrounding this code which creates a new curXYZ2 so that both can be used if necessary, but certainly to not interfere between each other.

vcharles

Author

Commented: 2011-11-07

Hello,

When I try Me.Controls("C1" & curXYZ).Text

I receive the following error: "Text is not a member of 'System.Web.UI.Control"

Victor

djon2003Senior software engineer

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Commented: 2011-11-11

Oh yes ! I shall have seen it from the instruction Server.MapPath that your are writing an ASP.NET page in VB.NET. Just a hint, when you post a question in this condition, you shall put both tags for the question (easy for experts to get).

So next, Text property doesn't exist in the class System.Web.UI.Control. What is the type of control you are accessing ? If they are all of the same type and this type has a Text property, then you can cast to your control type.

CType(Me.Controls("C1" & curXYZ), !!!MYTYPE!!!).Text

You have to replace !!!MYTYPE!!! with the real type of the control you use.

If your control doesn't have the Text property, then you should access the appropriate property to get what you need.

Looking into MSDN or Object browsers (into Visual Studio), you can know all the members (properties, methods, events, etc) of any class you need.

vcharles

Author

Commented: 2011-11-11

Hello,

Yes it does have a text property, I am using a control from ComponentOne. The properties windows shows the following:

C1Receiver C1.Web.UI.Controls.C1ComboBox.C1ComboBox.

Should the code be CType(Me.Controls("C1" & curXYZ), C1ComboBox.C1ComboBox).Text

Thanks,

Victor

djon2003Senior software engineer

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Commented: 2011-11-11

Shall be

vcharles

Author

Commented: 2011-11-11

Hi,

I received the following error:

Conversion from string "C1Manufacturer" to type 'Integer' is not valid.
with code:

Dim xcontrol1 As String
xcontrol1 = CType(Me.Controls("C1" & curXYZ), C1ComboBox).Text

Same error occured with

Dim xcontrol1 As String
xcontrol1 = CType(Me.Controls("C1" & curXYZ), C1ComboBox.C1ComboBox).Text

Victor

djon2003Senior software engineer

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Commented: 2011-11-11

Ok. I'll give you directly the solution, but I really think you should read the MSDN to at least understand the classes you're using. I'll give you an example.

In the instruction : CType(Me.Controls("C1" & curXYZ), C1ComboBox).Text

Me refers to a System.Web.UI.Page class. (Supposed here, but quiet sure due to the error message you gave me)
Controls refers to a System.Web.UI.ControlCollection class.
(...) refers to the property Item of the ControlCollection class returned by the Controls property of the Page class.
In fact, it is : CType(Me.Controls.Item("C1" & curXYZ), C1ComboBox).Text

All the classes named here could be found into MSDN using google or within search engine. You can scan all the properties and their description just to learn the possibilities offered by these classes. Making that, you won't remember all of that, but at least some and more, you're comprehension of all this will grow up.

So, here, your bug occurs because the Item property requires one parameter which is an Integer. As specified in the message error. So now, we understand that accessing the control by the ID (here I presume that "C1" & curXYZ is the ID) can't be done with this property.

Looking around, you would found a method on Control class called FindControl which allows you to search by ID a control. So the instruction would become :
CType(Me.FindControl("C1" & curXYZ), C1ComboBox).Text

------

I always promote experience learning which makes your knowledge growing, but also your competency to reach information and others aside.

vcharles

Author

Commented: 2011-11-12

Thank you, I will try it and get back to you.

vcharles

Author

Commented: 2011-11-13

Hi,

I tried it but received the folowig error: Object reference not set to an instance of an object.

I am not trying the retreive the ID, the xcontrol1 should return the text values of the combobos controls.
Below is a part of the code curXYZ based on the value I received for xtable, curXYZ is returning the correct data (i.e. ReceiverTable)

Dim xtable As String
xtable = curXYZ & "Table"
Dim xcontrol1 As String
MsgBox(xtable)
xcontrol1 = CType(Me.FindControl("C1" & curXYZ), C1ComboBox).Text ***Error line
MsgBox(xcontrol1)

Thanks

Victor

djon2003Senior software engineer

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Commented: 2011-11-13

I'm missing information to continue. Can I see the ASP.NET page ? How to you define the controls you try to access ?

How long have you been programming ?

vcharles

Author

Commented: 2011-11-13

Hi,

I've been programming windows applications for long time, but mainly using SQL statements with crystal Report, recently started using LINQ and XM.

Below is my code:

Thanks,

Code ASPX:

<%@ Page Title="Home Page" Language="vb" MasterPageFile="~/Site.Master" AutoEventWireup="false"
CodeBehind="Default.aspx.vb" Inherits="AOP28Web090811._Default" %>

<%@ Register assembly="C1.Web.UI.Controls.4" namespace="C1.Web.UI.Controls.C1GridView" tagprefix="cc1" %>

<%@ Register assembly="C1.Web.UI.Controls.4" namespace="C1.Web.UI.Controls.C1ComboBox" tagprefix="cc2" %>

<%@ Register assembly="C1.Web.UI.Controls.4" namespace="C1.Web.UI.Controls.C1Input" tagprefix="cc3" %>
<%@ Register assembly="C1.Web.UI.Controls.4" namespace="C1.Web.UI.Controls.C1Calendar" tagprefix="cc4" %>
<asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent">
<style type="text/css">
</style>
</asp:Content>
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
<asp:ScriptManager ID="ScriptManager1" runat="server" />
<h2 class="style177">
<strong>[Add] screen</strong></h2>
<p class="style3">
<asp:MultiView ID="MultiView1" runat="server" ActiveViewIndex="0">
<asp:View ID="View1" runat="server">
<table class="style1">
<tr>
<td class="style216" colspan="10">
<strong>Basic Item Data</strong></td>
</tr>
<tr>
<td class="style226">
100-Item Desigation</td>
<td class="style180">
<cc2:C1ComboBox ID="C1Item" runat="server" AutoComplete="False"
AutoFilter="False" CausesValidation="False" DropDownPositioningMode="RightTop"
EmptyText="" FooterText=""
ToolTip="Enter or Select Existing Item" UseEmbeddedVisualStyles="True"
VisualStyle="Vista" Height="21px" Width="162px" Text="Enter/Select">
</cc2:C1ComboBox>
</td>
<td class="style209">
<asp:Button ID="Button10" runat="server" Height="24px" style="text-align: left"
Text="?" Width="16px" />
</td>
<td class="style209" colspan="2">
<asp:Button ID="Button16" runat="server" Text="Search Item" Width="47px" />
<asp:Button ID="Button19" runat="server" Text="Button" />
</td>
<td class="style221">
<asp:Label ID="Label1" runat="server" Text="Replace with" Visible="False"></asp:Label>
 </td>
<td class="style228">
<cc2:C1ComboBox ID="C1ItemReplace" runat="server" AutoComplete="False"
AutoFilter="False" CausesValidation="False" DropDownPositioningMode="RightTop"
EmptyText="" FooterText="" Height="21px" Text="Enter/Select"
ToolTip="Enter or Select Existing Item" UseEmbeddedVisualStyles="True"
VisualStyle="Vista" Width="162px" Visible="False">
</cc2:C1ComboBox>
</td>
<td class="style221">
130- Date</td>
<td class="style185">
<cc2:C1ComboBox ID="C1Date" runat="server" AutoComplete="False"
AutoFilter="False" CausesValidation="False" style="text-align: justify"
Text="" Height="22px" IsEditable="False"
UseEmbeddedVisualStyles="True" VisualStyle="Vista">
</cc2:C1ComboBox>
</td>
<td class="style185">
<asp:Button ID="Button13" runat="server" Height="24px" style="text-align: left"
Text="?" Width="16px" />
</td>
</tr>
<tr>
<td class="style226">
110-Item Type</td>
<td class="style180">
<cc2:C1ComboBox ID="C1ItemType" runat="server" AutoComplete="False"
AutoFilter="False" CausesValidation="False" Text="Select"
DropDownPositioningMode="RightTop" DropDownResizable="True"
TemplateItemHighlighted="False" UseEmbeddedVisualStyles="True"
VisualStyle="Vista" ForceSelectionText="True" IsEditable="False">
</cc2:C1ComboBox>
</td>
<td class="style209">
<asp:Button ID="Button11" runat="server" Height="24px" style="text-align: left"
Text="?" Width="16px" />
</td>
<td class="style181" colspan="5">
    120 - ItemA Type</td>
<td class="style185">
<cc2:C1ComboBox ID="C1ItemAType" runat="server" AutoComplete="False"
AutoFilter="False" CausesValidation="False" DropDownPositioningMode="TopLeft"
style="text-align: left" Text="Select" UseEmbeddedVisualStyles="True"
VisualStyle="Vista" IsEditable="False">
</cc2:C1ComboBox>
</td>
<td class="style185">
<asp:Button ID="Button14" runat="server" Height="24px" style="text-align: left"
Text="?" Width="16px" />
</td>
</tr>
<tr>
<td class="style211">
101-Manufacturer</td>
<td class="style212">
<cc2:C1ComboBox ID="C1Manufacturer" runat="server"
UseEmbeddedVisualStyles="True" VisualStyle="Vista"
DropDownPositioningMode="RightTop" Text="Enter/Select">
</cc2:C1ComboBox>
</td>
<td class="style213">
<asp:Button ID="Button12" runat="server" Height="24px" style="text-align: left"
Text="?" Width="16px" />
</td>
<td class="style214" colspan="5">
  111-Self Activation</td>
<td class="style219">
<cc2:C1ComboBox ID="C1SelfActivation" runat="server" AutoComplete="False"
AutoFilter="False" CausesValidation="False" Text="Select" IsEditable="False"
UseEmbeddedVisualStyles="True" VisualStyle="Vista">
</cc2:C1ComboBox>
</td>

<td class="style219">
<asp:Button ID="Button15" runat="server" Height="24px" style="text-align: left"
Text="?" Width="16px" />
</td>

</tr>
<tr>
<td class="style200">
<span class="style199">140- Illustration</span></td>
<td class="style206">
<cc2:C1ComboBox ID="C1Illustration" runat="server"
DropDownPositioningMode="RightTop" ShowTrigger="False" Text=""
UseEmbeddedVisualStyles="True" VisualStyle="Vista">
</cc2:C1ComboBox>
</td>
<td colspan="2">
<asp:Button ID="Button1" runat="server" Height="24px" Text="Load Image...."
Width="156px" />
</td>
<td colspan="4">
<asp:Button ID="Button18" runat="server" Text="Show" />
</td>
</tr>
<tr><td colspan="10">=<asp:Image ID="Image1" runat="server" Height="370px"
Width="424px" />
</td>
</tr>
</table>
</asp:View>
<asp:View ID="View2" runat="server">
<table class="style1">
<tr>
<td class="style170" colspan="2">
<strong><span class="style178">Identification</span></strong></td>
<td class="style173">
 </td>
<td class="style185">
 </td>
</tr>
<tr>
<td class="style204">
200-Country Org</td>
<td class="style196">
<cc2:C1ComboBox ID="C1CountryOrigin" runat="server" AutoComplete="False"
AutoFilter="False" CausesValidation="False" MaxLength="3" Text="Select"
Height="20px" IsEditable="False" UseEmbeddedVisualStyles="True"
VisualStyle="Vista" DropDownPositioningMode="RightTop" Width="51px">
</cc2:C1ComboBox>
</td>
</tr>
<tr>
<td class="style204">
210-User Country</td>
<td class="style196">
<cc2:C1ComboBox ID="C1CountryUser" runat="server" AutoComplete="False"
AutoFilter="False" CausesValidation="False" Text="Select"
IsEditable="False" UseEmbeddedVisualStyles="True" VisualStyle="Vista"
DropDownPositioningMode="RightTop" Width="51px">
</cc2:C1ComboBox>
</td>
<td class="style49" colspan="2" rowspan="17">
 </td>
</tr>
<tr>
<td class="style204">
230-User(s)</td>
<td class="style196">
<cc2:C1ComboBox ID="C1Users" runat="server" AutoComplete="False"
AutoFilter="False" CausesValidation="False" Text="Select"
IsEditable="False" UseEmbeddedVisualStyles="True" VisualStyle="Vista"
DropDownPositioningMode="RightTop" Width="51px">
</cc2:C1ComboBox>
</td>
</tr>
<tr>
<td class="style204">
220-Life Cycle St</td>
<td class="style196">
<cc2:C1ComboBox ID="C1LifeCycleStatus" runat="server" AutoComplete="False"
AutoFilter="False" CausesValidation="False" Text="Select"
IsEditable="False" UseEmbeddedVisualStyles="True" VisualStyle="Vista"
DropDownPositioningMode="RightTop" style="height: 22px">
</cc2:C1ComboBox>
</td>
</tr>
<tr>
<td class="style194">
240-NSN (xxxx-xx-xxx-xxxx)</td>
<td class="style195">
<cc2:C1ComboBox ID="C1NSN" runat="server" AutoComplete="False"
AutoFilter="False" CausesValidation="False" Text="Enter/Select"
UseEmbeddedVisualStyles="True" VisualStyle="Vista"
DropDownPositioningMode="RightTop">
</cc2:C1ComboBox>
</td>
</tr>
<tr>
<td class="style204">
250-ItemA Type</td>
<td class="style196">
<cc2:C1ComboBox ID="C1ItemAType" runat="server" AutoComplete="False"
AutoFilter="False" CausesValidation="False" Text="Select"
IsEditable="False" UseEmbeddedVisualStyles="True" VisualStyle="Vista"
DropDownPositioningMode="RightTop">
</cc2:C1ComboBox>
</td>
</tr>
<tr>
<td class="style190" colspan="2">
<strong>ItemB Levels</strong></td>
</tr>
<tr>
<td class="style191" rowspan="0">
260-Rotation Min. (xxx,xxx)</td>
<td class="style192" rowspan="0">
<cc2:C1ComboBox ID="C1RotationMinimum" runat="server" AutoComplete="False"
AutoFilter="False" CausesValidation="False" Text="Enter/Select"
UseEmbeddedVisualStyles="True" VisualStyle="Vista"
DropDownPositioningMode="RightTop" style="text-align: justify">
</cc2:C1ComboBox>
</td>
</tr>
<tr>
<td class="style204">
261-Rotation Max. (xxx,xxx)</td>
<td class="style196">
<cc2:C1ComboBox ID="C1RotationMaximum" runat="server" AutoComplete="False"
AutoFilter="False" CausesValidation="False" Text="Enter/Select"
UseEmbeddedVisualStyles="True" VisualStyle="Vista"
DropDownPositioningMode="RightTop">
</cc2:C1ComboBox>
</td>
</tr>
<tr>
<td class="style204">
262-Acceleration Min. (xxx,xxx)</td>
<td class="style196">
<cc2:C1ComboBox ID="C1ItemDesignation9" runat="server" AutoComplete="False"
AutoFilter="False" CausesValidation="False" Text="Enter/Select"
DropDownPositioningMode="TopRight" UseEmbeddedVisualStyles="True"
VisualStyle="Vista">
</cc2:C1ComboBox>
</td>
</tr>
<tr>
<td class="style204">
263-Acceleration Dur. Min (xx.xx)</td>
<td class="style196">
<cc2:C1ComboBox ID="C1ItemDesignation10" runat="server" AutoComplete="False"
AutoFilter="False" CausesValidation="False" Text="Enter/Select"
VisualStyle="Vista">
</cc2:C1ComboBox>
</td>
</tr>
<tr>
<td class="style204">
264-Acceleration Max (xxx,xxx)</td>
<td class="style196">
<cc2:C1ComboBox ID="C1ItemDesignation11" runat="server" AutoComplete="False"
AutoFilter="False" CausesValidation="False" Text="Enter/Select"
VisualStyle="Vista">
</cc2:C1ComboBox>
</td>
</tr>
<tr>
<td class="style204">
265-Acceleration Dur. Max(xx.xx)</td>
<td class="style196">
<cc2:C1ComboBox ID="C1ItemDesignation12" runat="server" AutoComplete="False"
AutoFilter="False" CausesValidation="False" Text="Enter/Select"
VisualStyle="Vista">
</cc2:C1ComboBox>
</td>
</tr>
<tr>
<td class="style187">
266-Min Programmable Time (xx)</td>
<td class="style188">
<cc2:C1ComboBox ID="C1ItemDesignation13" runat="server" AutoComplete="False"
AutoFilter="False" CausesValidation="False" Text="Enter/Select"
VisualStyle="Vista">
</cc2:C1ComboBox>
</td>
</tr>
<tr>
<td class="style204">
267-Max Programmable Time (xx)</td>
<td class="style196">
<cc2:C1ComboBox ID="C1ItemDesignation14" runat="server" AutoComplete="False"
AutoFilter="False" CausesValidation="False" Text="Enter/Select"
UseEmbeddedVisualStyles="True" VisualStyle="Vista">
</cc2:C1ComboBox>
</td>
</tr>
<tr>
<td class="style204">
268-Max Flight Time (xx,xxx)</td>
<td class="style196">
<cc2:C1ComboBox ID="C1ItemDesignation15" runat="server" AutoComplete="False"
AutoFilter="False" CausesValidation="False" Text="Enter/Select"
VisualStyle="Vista">
</cc2:C1ComboBox>
</td>
</tr>
<tr>
<td class="style204">
269-Features</td>
<td class="style196">
<cc2:C1ComboBox ID="C1ItemDesignation16" runat="server" AutoComplete="False"
AutoFilter="False" CausesValidation="False" Text="Select"
VisualStyle="Vista">
</cc2:C1ComboBox>
</td>
</tr>
<tr>
<td class="style204">
270-Course Correcting Features</td>
<td class="style196">
<cc2:C1ComboBox ID="C1ItemDesignation17" runat="server" AutoComplete="False"
AutoFilter="False" CausesValidation="False" Text="Select"
VisualStyle="Vista">
</cc2:C1ComboBox>
</td>
</tr>
</table>

</asp:View>

</asp:MultiView>
<asp:Button ID="btnBack" runat="server" Text="Back" />
<asp:Button ID="btnNext" runat="server" Text="Next" />
<asp:Button ID="btnSave" runat="server" Text="Save" />
<asp:Button ID="btnPrev" runat="server" Text="<< Prev" />
<asp:Button ID="btnNextA" runat="server" Text="Next >>" />
<asp:Button ID="Button7" runat="server" Text="|< First" Width="67px" />
<asp:Button ID="Button8" runat="server" Text="Last >|" />
<asp:TextBox ID="RecordNumber" runat="server"></asp:TextBox>
</p>
<script type="text/javascript"> //using C1ClientSide Event function
onBeforeCellUpdate(grid, args) {
var numberpattern = /\d{3}\-\d{2}\-\d{3}\-\d{5}$/;
if (args.get_cell().get_column().get_dataField() == "Phone")
{
var Myinput = args.get_cell().get_value();
var matchvalue = (Myinput.match(numberpattern)) ? true : false;
if (!matchvalue) { args.set_cancel(true);
window.alert("Please enter (999-99-999-99999) format only.");
args.get_cell().get_contentControl().getElementsByTagName("input")[0].focus(); } } }
</script>
</asp:Content>

Code: Save button (i.e Save Manufacturer data)

Protected Sub Button19_Click(sender As Object, e As EventArgs) Handles Button19.Click
Dim xyz() As String = New String() {"Manufacturer"}
Dim i As Integer
i = 0
For i = 0 To 1
Dim curXYZ = xyz(i)
Dim MyFix As XDocument = XDocument.Load(Server.MapPath("~/App_Data/" & curXYZ & ".xml"))
Dim xid As String
xid = curXYZ & "_ID"
Dim LargestFixID = (From el In MyFix.Descendants(curXYZ & "Table") Select CInt(el.<xid>.Value)).ToList
LargestFixID.Sort()
Dim xtable As String
xtable = curXYZ & "Table"
Dim xcontrol1 As String
' xcontrol1 = CType(Me.Controls("C1" & curXYZ), C1ComboBox).Text
MsgBox(xtable)
xcontrol1 = CType(Me.FindControl("C1" & curXYZ), C1ComboBox).Text.ToString
MsgBox(xcontrol1)
Dim xcontrol As String
xcontrol = "Me.C1" & curXYZ & ".Text.ToString"
MsgBox(xcontrol1)
Dim CheckForItemFix = (From el In MyFix.Descendants(xtable).Elements(curXYZ) Select el.Value).ToList
If Not CheckForItemFix.Contains(xcontrol1) Then
Dim xNew As XElement = New XElement(xtable)
xNew.Add(New XElement(xid, (LargestFixID.Last() + 1)))
xNew.Add(New XElement(curXYZ, xcontrol1))
MyFix.Root.Add(xNew)
MyFix.Save(Server.MapPath("~/App_Data/" & curXYZ & ".xml"))
End If

Dim searchFix As String = xcontrol1
Dim searchIdFix As String = Nothing
Dim domFix As New XmlDocument()
domFix.Load(Server.MapPath("~/App_Data/" & curXYZ & ".xml"))
Dim listFix As XmlNodeList = domFix.SelectNodes("//" & xtable)
If CheckForItemFix.Contains(xcontrol1) Then
For Each node As XmlNode In listFix
If node(curXYZ).InnerText.Equals(searchFix) Then
searchIdFix = node(xid).InnerText
Exit For
End If
Next
End If
Next

End Sub

'Declarations:

Imports System.Xml
Imports System
Imports System.Text
Imports C1.Web.UI.Controls.C1ComboBox
Imports C1.Web.UI.Controls

djon2003Senior software engineer

CERTIFIED EXPERT

Commented: 2011-11-14

Well, from that page you posted, the control C1Receiver doesn't exist.

So calling Me.FindControl with an ID nonexistent is returning Nothing. So after then, calling a method or property, like Text, on Nothing generates the error : Object reference not set to an instance of an object.

So, either you ensure that all the controls with the ID you need really exist or you add this piece of code.

If Me.FindControl("C1" & curXYZ) IsNot Nothing Then xcontrol1 = CType(Me.Controls("C1" & curXYZ), C1ComboBox).Text

Open in new window

vcharles

Author

Commented: 2011-11-14

Hi,

I am testing the project with the C1manufacturer control

Dim xyz() As String = New String() {"Manufacturer"}

Only Manufacturer is included in the xyz() string.

it exist in the .aspx file:

<td class="style212">
<cc2:C1ComboBox ID="C1Manufacturer" runat="server"
UseEmbeddedVisualStyles="True" VisualStyle="Vista"
DropDownPositioningMode="RightTop" Text="Enter/Select">
</cc2:C1ComboBox>
</td>

Victor

djon2003Senior software engineer

CERTIFIED EXPERT

Commented: 2011-11-14

Ok, I presume then that the problem is coming from the fact that your control is not inside the page, but within a container.

Let's try then this recursive method :

Public Function searchControl(idToSearch As String, obj As Control) As Control
 Dim foundControl As Control = obj.FindControl(idToSearch)
 If foundControl IsNot Nothing Then Return foundControl

 For i As Integer = 0 To obj.Controls.Count - 1
  If obj.Controls(i).Count = 0 Then Continue For

  foundControl = searchControl(idToSearch, obj.Controls(i))
  If foundControl IsNot Nothing Then Return foundControl
 Next

 Return Nothing
End Function

Open in new window

vcharles

Author

Commented: 2011-11-14

Hi,

Thanks for the code, when I add it to my button click event, what value to I pass to idToSearch?

Victor

djon2003Senior software engineer

CERTIFIED EXPERT

Commented: 2011-11-14

Call the function like this :
searchControl("C1" & curXYZ, Me)

vcharles

Author

Commented: 2011-11-15

Hi,

I'm getting the folowing error message in the Function: "Count is not a member of System.Web.UI.Control"

The other problem I noticed when Using multiple files in the xyz() string, I am only able to save data for the last file in the list, is thetre a way MyFix variable to save the data for each file in the xyz() string?

Code:
Dim xyz() As String = New String() {"Manufacturer"}
Dim i As Integer
i = 0
For i = 0 To 1
Dim curXYZ = xyz(i)
Dim MyFix As XDocument = XDocument.Load(Server.MapPath("~/App_Data/" & curXYZ & ".xml"))
Dim xid As String
xid = curXYZ & "_ID"
Dim LargestFixID = (From el In MyFix.Descendants(curXYZ & "Table") Select CInt(el.<xid>.Value)).ToList
LargestFixID.Sort()
Dim xtable As String
xtable = curXYZ & "Table"

Dim xcontrol1 As String = ""
searchControl("C1" & curXYZ, Me)
'If Me.FindControl("C1" & curXYZ) IsNot Nothing Then xcontrol1 = CType(Me.Controls("C1" & curXYZ), C1ComboBox).Text
MsgBox(xcontrol1)
Dim CheckForItemFix = (From el In MyFix.Descendants(xtable).Elements(curXYZ) Select el.Value).ToList
If Not CheckForItemFix.Contains(xcontrol1) Then
Dim xNew As XElement = New XElement(xtable)
xNew.Add(New XElement(xid, (LargestFixID.Last() + 1)))
xNew.Add(New XElement(curXYZ, xcontrol1))
MyFix.Root.Add(xNew)
MyFix.Save(Server.MapPath("~/App_Data/" & curXYZ & ".xml"))
End If

Dim searchFix As String = xcontrol1
Dim searchIdFix As String = Nothing
Dim domFix As New XmlDocument()
domFix.Load(Server.MapPath("~/App_Data/" & curXYZ & ".xml"))
Dim listFix As XmlNodeList = domFix.SelectNodes("//" & xtable)
If CheckForItemFix.Contains(xcontrol1) Then
For Each node As XmlNode In listFix
If node(curXYZ).InnerText.Equals(searchFix) Then
searchIdFix = node(xid).InnerText
Exit For
End If
Next
End If
Next

Public Function searchControl(ByVal idToSearch As String, ByVal obj As Control) As Control
Dim foundControl As Control = obj.FindControl(idToSearch)
If foundControl IsNot Nothing Then Return foundControl

For i As Integer = 0 To obj.Controls.Count - 1
If obj.Controls(i).Count = 0 Then Continue For
foundControl = searchControl(idToSearch, obj.Controls(i))
If foundControl IsNot Nothing Then Return foundControl
Next
Return Nothing
End Function

vcharles

Author

Commented: 2011-11-15

Hello,

Is there a way to do

MyFix(i).Root.Add(xNew)
MyFix(i).Save(Server.MapPath("~/App_Data/" & curXYZ & ".xml"))

To avoid using an If ststement for each value of curXYZ?

Vctror

djon2003Senior software engineer

CERTIFIED EXPERT

Commented: 2011-11-15

Ok, excuse me to say it like that, but I can't continue. As I see, real base of programming seems missing to you.

First, the function I created, I made it on my cellphone. I don't think there are errors, but I could have insert some. And those would have been easy to fix for someone having this base.

Second, I created a FUNCTION, which implies a return. So, the usage of the function should have been assigned to a variable which would have been of the same type or a derived one of the function return.

Third, I don't understand quickly why the count property bug when it should exist on all System.Web.UI.Control's Controls property. If you look at the page below, you will see it.
http://msdn.microsoft.com/en-us/library/system.web.ui.controlcollection.aspx

Finally, I think I gave you enough hints on how to proceed and I hope you'll investigate a bit more by yourself.

vcharles

Author

Commented: 2011-11-15

Thanks for all your help.

Help with retreiving text data with concatenate method

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