by Jason N. Gaylord
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| Section 3: Implementing The Page |
Now that our document is set, we must then add code to edit this node. In this case, we will use a drop down box with the correct values of this node. We will then edit the web.config file by setting the value equal to the returned value of the drop-down control. Finally, we need to save the web.config file to store our new settings. An example of this is shown below:
EditConfig.aspx
**************************************************
1: <%@ Page Language="vb" %>
2: <%@ import Namespace="System" %>
3: <%@ import Namespace="System.Xml" %>
4: <script runat="server">
5:
6: Sub Page_Load(s as Object, e as EventArgs)
7: Dim myConfig As New XmlDocument()
8:
9: myConfig.Load("C:\InetPub\wwwroot\web.config")
10:
11: If not isPostBack then
12: Dim myCurrentValue as String
13: Dim myListItem as ListItem
14:
15: myCurrentValue = myConfig.SelectSingleNode(
"configuration/system.web/customErrors/@mode").Value
16: myListItem = node01.Items.FindByText(myCurrentValue)
17:
18: node01.SelectedIndex = node01.Items.IndexOf(myListItem)
19: Else
20: 'We will save this for later!
21: End If
22:
23: End Sub
24:
25: Sub Button_Click(s as Object, e as EventArgs)
26: Dim myConfig As New XmlDocument()
27: Dim myAttribute As XmlAttribute
28:
29: myConfig.Load("C:\InetPub\wwwroot\web.config")
30:
31: myAttribute = myConfig.SelectSingleNode(
"configuration/system.web/customErrors/@mode")
32: myAttribute.Value = node01.SelectedItem.ToString()
33:
34: myConfig.Save("C:\InetPub\wwwroot\web.config")
35: End Sub
36:
37: </script>
38: <html>
39: <head>
40: <title>Web.config Editor</title>
41: </head>
42: <body>
43: <form runat="server">
44: <asp:Label id="title01" runat="server" text="Custom Errors:" />
45: <asp:DropDownList id="node01" runat="server">
46: <asp:ListItem Value="On" text="On" />
47: <asp:ListItem Value="Off" text="Off" />
48: <asp:ListItem Value="RemoteOnly" text="RemoteOnly" />
49: </asp:DropDownList>
50: <br />
1: <asp:Button id="myButton" runat="server" Text="Update"
OnClick="Button_Click" />
52: </form>
53: </body>
54: </html>
Now that we have changed a pre-defined node, let's change a custom node. This node will have a similar node, but with a different property. This will be demonstrated in Part 2. You can go to Part 2 by clicking here. |
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User Comments
Title:
I Have question
Name:
OMAR ALZOBAIDI
Date:
2006-05-08 2:25:38 AM
Comment:
How to use Location Tag in web.config file?
-------------------------------------------
and .......... Thanks !!!
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Title:
Excellent trial for NewToXml
Name:
Baljeet Kiroriwal
Date:
2006-03-02 7:46:07 AM
Comment:
Good Article n gr8 information
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Title:
What if the solution is in a source safe
Name:
m7e7
Date:
2004-08-05 4:03:37 PM
Comment:
What if the soln is in a source safe vault?
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Title:
The problems I had
Name:
Sergio Florez
Date:
2004-07-23 9:51:21 AM
Comment:
First, sorry if I mix up the first and second part of the article but here goes:
You're capturing the return of SelectSingleNode() in an XmlAttribute and that didn't work for me. It said it needed a NodeSet. I fixed this by capturing it with an XmlNode and working with its Attributes collection.
The other problem I had was that your XPath didn't capture the node for me so I had to use this:
"descendant::appSettings/add[@key='conServer']"
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Title:
RE: Thanks but no thanks
Name:
Jason
Date:
2004-07-22 4:35:10 PM
Comment:
I wish you'd let me know what isn't working. This way I can provide some "troubleshooting" for you.
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Title:
Thanks but no thanks
Name:
Sergio Florez
Date:
2004-07-22 11:31:08 AM
Comment:
This article's basic concept of trying to modify the web.config is great, unfortunately the code doesn't work for me. Maybe you should try and write some troubleshooting for this.
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