Configuration and Deployment

Re: (Writing to Web.config file dynamically

hannous — Wed, 02 Jul 2008 05:02:40 GMT

I'm sorry you still have one more thing to do, add //ns: before NodeLocation on that previous line, so you'll have:

NodeLocationDim appSettingsNode As XmlNode = xmlDoc.SelectSingleNode("//ns:" + NodeLocation, XmlNamespaceManager)
appSettingsNode = appSettingsNode.FirstChild

I tried your code with this and it worked.

Re: (Writing to Web.config file dynamically

kanthu2681 — Tue, 01 Jul 2008 04:30:43 GMT

Hi hannous. Thanks for your time.

This did not work. Is there any alternative. I'm also trying with System.Configuration namespace but i'm facing the same problem there. Need ur help. Also,let me know when u'll be online (Your gmail/yahoo account) so that we can both work at same time to resolve this issue

Re: (Writing to Web.config file dynamically

hannous — Mon, 30 Jun 2008 22:03:35 GMT

Your problem is that the node "configuration/appSettings" is not being recognized because of the namespace. What you need to do is first go the node "configuration" then go to "appSettings". To do so, set the NodeLocation first to "configuration" (without /appSettings), then, after this line:

Dim appSettingsNode As XmlNode = xmlDoc.SelectSingleNode(NodeLocation, XmlNamespaceManager)

try:

appSettingsNode = appSettingsNode.FirstChild

Then keep the rest of the code as it is. As long as appSettings is the first child node under the configuration node (normal situation), this should work.

Re: (Writing to Web.config file dynamically

kanthu2681 — Mon, 30 Jun 2008 08:07:59 GMT

Hi hannous, I am still not able to succeed and kindly help me to succeed with this problem. Here is my code and xml file.

Imports System.Xml

Module Module1

Dim FileLocation As String = "C:\webroot\web.config"

Dim NodeLocation As String = "configuration/appSettings"

Sub Main()

Dim x As Boolean = AddKey(FileLocation, NodeLocation)

If (x) Then

Console.WriteLine("success")

Else

Console.WriteLine("failed")

End If

'Adds a key and value to the configuration file

End Sub

Public Function AddKey(ByVal strKey As String, ByVal strValue As String) As Boolean

Dim xmlDoc As New XmlDocument

'Change this to the location of your configuration file

xmlDoc.Load(FileLocation)

Dim XmlNamespaceManager As System.Xml.XmlNamespaceManager = New System.Xml.XmlNamespaceManager(xmlDoc.NameTable)

XmlNamespaceManager.AddNamespace("ns", "http://schemas.microsoft.com/.NetConfiguration/v2.0")

'Change this if node is different

Dim appSettingsNode As XmlNode = xmlDoc.SelectSingleNode(NodeLocation, XmlNamespaceManager)

Try

'Check if the node exists before adding it

If (KeyExists(strKey)) Then

Throw New ArgumentException("Key name: <" + strKey + "> already exists in the configuration.")

End If

'You must have at least one key that can be empty

Dim newChild As XmlNode = appSettingsNode.FirstChild.Clone

newChild.Attributes("key").Value = strKey

newChild.Attributes("value").Value = strValue

appSettingsNode.AppendChild(newChild)

xmlDoc.Save(FileLocation)

Return True

Catch ex As Exception

Return False

End Try

End Function

'Determines if a key exists

Public Function KeyExists(ByVal strKey As String) As Boolean

Dim xmlDoc As New XmlDocument

xmlDoc.Load(FileLocation)

Dim appSettingsNode As XmlNode = xmlDoc.SelectSingleNode(NodeLocation)

Dim childNode As XmlNode

For Each childNode In appSettingsNode

If (childNode.Attributes("key").Value = strKey) Then

Return True

End If

Return False

End Function

End Module

Here is the XML file code:

<?xml version="1.0"?>
<configuration xmlns="http://schemas.microsoft.com/.NetConfiguration/v2.0">

-----------

I am receiving nothing as the value for appsettingsNode variable. Kindly, let me know where i'm going wrong and help me out.

Re: (Writing to Web.config file dynamically

hannous — Fri, 27 Jun 2008 21:24:21 GMT

Hi,

No that's not the problem. Actually I forgot to tell you that you should add NameSpaceManager to SelectSingleNode, therefore changing:

Dim appSettingsNode As XmlNode = xmlDoc.SelectSingleNode(NodeLocation)

to:

Dim appSettingsNode As XmlNode = xmlDoc.SelectSingleNode(NodeLocation, XmlNamespaceManager)

Re: (Writing to Web.config file dynamically

kanthu2681 — Thu, 26 Jun 2008 09:34:07 GMT

Hi Thanks for your prompt response. But It did not worked still the value is giving null for appsettingsNode.

In the web.config file the namespace prefix is xmlns(which is reserve key word) and in the code we are using 'ns' as the prefix. Hope coz of this it failed.

Kindly, let me know where i'm going wrong.

Re: (Writing to Web.config file dynamically

hannous — Wed, 25 Jun 2008 15:45:57 GMT

To care for the namespace, add the following:

After:

xmlDoc.Load(FileLocation)

Add:

Dim XmlNamespaceManager As System.Xml.XmlNamespaceManager = New System.Xml.XmlNamespaceManager(xmlDoc.NameTable)
XmlNamespaceManager.AddNamespace("ns", "http://schemas.microsoft.com/.NetConfiguration/v2.0")

Re: (Writing to Web.config file dynamically

kanthu2681 — Wed, 25 Jun 2008 09:42:28 GMT

Here is my web.config file that i'm trying to update dynamically using Hannous code and I receive null as XmlNode. But this works only if i remove xmlns from the web.config. Could you please help me out as it is very urgent for me.

<?xml version="1.0"?>
<configuration xmlns="http://schemas.microsoft.com/.NetConfiguration/v2.0">
<configSections>

<appSettings>
    
    <add key="ConnStr" value="Server=servername; database=databasename;Integrated Security=SSPI;Connect Timeout=0" />
    
    <add key="ROLESPACE" value="E:\webroot\OAWebService\oaweb.xml" />
    <add key="TOCLevelDepth" value="3" />
    <add key="SearchMax" value="500" />
</appSettings>

</configuration>

Thanks!!!

Re: (Writing to Web.config file dynamically

syedrizwanshah — Thu, 18 Oct 2007 05:34:08 GMT

This may help

Use configSource attribute to manage Web.Config sections in ASP.Net 2.0

http://rizwanshah.blogspot.com/2007/10/use-configsource-attribute-to-manage.html

Re: (Writing to Web.config file dynamically

hannous — Tue, 18 Sep 2007 11:09:25 GMT

Are you sure you have write access to that path?

Re: (Writing to Web.config file dynamically

hajaworld — Tue, 18 Sep 2007 10:59:00 GMT

hi i am tried your concept,but it arise error when execute save line

error is;Access to the path is denied

help me

hajaworld@yahoo.co.in

Re: (Writing to Web.config file dynamically

amersafi — Wed, 10 Jan 2007 13:43:01 GMT

thank u that helped me

Re: (Writing to Web.config file dynamically

hannous — Wed, 10 Jan 2007 12:50:29 GMT

Here's how you can add a key:

    Dim FileLocation As String = "C:\Inetpub\wwwroot\YourProject\web.config"
    Dim NodeLocation As String = "configuration/appSettings"

    'Adds a key and value to the configuration file
    Public Function AddKey(ByVal strKey As String, ByVal strValue As String) As Boolean
        Dim xmlDoc As New XmlDocument
        'Change this to the location of your configuration file
        xmlDoc.Load(FileLocation)
        'Change this if node is different
        Dim appSettingsNode As XmlNode = xmlDoc.SelectSingleNode(NodeLocation)
        Try
            'Check if the node exists before adding it
            If (KeyExists(strKey)) Then
                Throw New ArgumentException("Key name: <" + strKey + "> already exists in the configuration.")
            End If
            'You must have at least one key that can be empty
            Dim newChild As XmlNode = appSettingsNode.FirstChild.Clone
            newChild.Attributes("key").Value = strKey
            newChild.Attributes("value").Value = strValue
            appSettingsNode.AppendChild(newChild)
            xmlDoc.Save(FileLocation )
            Return True
        Catch ex As Exception
            Return False
        End Try
    End Function

    'Determines if a key exists
    Public Function KeyExists(ByVal strKey As String) As Boolean
        Dim xmlDoc As New XmlDocument
        xmlDoc.Load(FileLocation )
        Dim appSettingsNode As XmlNode = xmlDoc.SelectSingleNode(NodeLocation)
        Dim childNode As XmlNode
        For Each childNode In appSettingsNode
            If (childNode.Attributes("key").Value = strKey) Then
                Return True
            End If
        Next
        Return False
    End Function

Re: (Writing to Web.config file dynamically

Hope4sun — Wed, 10 Jan 2007 11:59:29 GMT

This article covers the code to do it pretty much http://www.west-wind.com/WebLog/posts/8461.aspx but as stated, you need high trust permissions on the server to do it.

(Writing to Web.config file dynamically

amersafi — Wed, 10 Jan 2007 06:52:20 GMT

i have web.config that have more than value like this

appSettings>

add key="lang" value="en"/>

add key="langCode" value="cmsv9_lang"/>

add key="SiteURL" value="/CMS9_Ajax_Website"/>

add key="RealURL" value="/10.10.0.253"/>

add key="SiteUserUrl" value="/User"/>

add key="SiteAdminUrl" value="/Admin"/>

add key="ImageUrl" value="/Images"/>

add key="ScriptUrl" value="/JS"/>

add key="WordsFilePath" value="/App_Data/xml/Localization_word.xml"/>

add key="LanguagesFilePath" value="/App_Data/xml/Localization_Languages.xml"/>

appSettings>

i can read this like this

Dim i As Integer = 0

Dim config As Configuration = WebConfigurationManager.OpenWebConfiguration(Request.ApplicationPath)

Dim appSettings As AppSettingsSection = CType(config.GetSection("appSettings"), AppSettingsSection)

Dim appKeys As String() = appSettings.Settings.AllKeys

For i = 0 To appSettings.Settings.Count - 1

objHT.Add(appSettings.Settings(appKeys(i)).Key, appSettings.Settings(appKeys(i)).Value)

but my question how can i update or add value in web.config dynamically from code