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Hi there,
I've got a TreeView like below
1
1.1
1.2
1.2.1
1.2.2
1.2.3
1.3
2
The code in SelectedIndexChange event like below
TreeNode currentNode = TreeView1.SelectedNode;<br />
TreeNode parentNode = currentNode.Parent;<br />
<br />
currentNode.Select();<br />
<br />
if (parentNode != null)<br />
{<br />
Response.Write(parentNode.ChildNodes.IndexOf(currentNode));<br />
}<br />
else<br />
Response.Write(TreeView1.Nodes.IndexOf(currentNode));
If I clicked 1.2.1 or 1.2.2. or 1.2.3, the page would say the index of the node I've cliked right.
If I clicked 1 or 1.1 or 1.2 or 1.3 or 2, the page would say the index of the node I've clicked is 0. 
I don't know why, the index of 2 should be 1, index of 1.3 should be 2, ... but it wasn't correctly.
Anyone help me solve this issue.
Thanks.
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I think you are looking for the documents tab in the IIS manager. This is where you set the start page of your site. It usually defaults to default.htm. So whatever you want your start page to be, you need to add it and put it at the top of the documents.
Hope that helps.
Ben
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i solved, not enought to prohibit VS 1.1
I also changed file extensions compability from Configuration menu at properties of default web site.
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I am using datatable in my application to show the data in gridview.Now what I want is that when user enter a new line application should check the datatable.if the record exists then it should show a warning otherwise add a new row in datatable.
I am using the following code to check the datatable through loop.
Dim x As DataRow
For Each x In mydatatable.Rows
If x.Item(1).ToString = Me.TextBox1.Text Then
Me.Label1.Text = "Exist"
End If
Next
With the above code I am getting error 'Object reference not set to an instance of an object.' at the first row of the for loop
Ejaz
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Wow - TextBox1 and Label1 are variables in production code ? That's pretty grim.
Please don't crosspost. Where you asked in the VB.NET forum is probably the best place for this, as it doesn't directly involve ASP.NET.
Obviously you have a Row which doesn't have 2 items in it. It's always good practice to test your assumptions, as in
if x.Items.Count > 1 && x.Item(1).ToString = Me.TextBox1.Text Then
something like that.
Christian Graus - Microsoft MVP - C++
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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I wrote code in the Application_End and Session_End in the Global.asax file
but i don't know how to invoke this code
i close the page and none of the 2 methods are invoked
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Session_End --
closing the page doesn't end the session. Even after closing the browser window session can be still active till the session time-out is reached.
Application_End --
application ends when the web-server is stopped or restarted or web.config file is updated/changed.
Regards
John
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can someone please help me. I've gotten all my code to work but my actual delete part. I've tried to fix it but i can't seem to fix the problem what i do just doesn't make any difference.
the code is:
<%
dim strSQL
if request.QueryString("ProductID")="" then
dim rs
set rs=server.CreateObject("ADODB.Recordset")
strSQL="SELECT * FROM Products"
rs.Open strSQL, oConn
response.Write("")
while not rs.EOF
response.Write("")
response.Write("")
response.Write("")
rs.MoveNext
response.Write("")
wend
response.Write("| " & rs("ProductID") & " | " & rs("ProductName") & " | " & rs("SupplierID") & " | " & formatcurrency(rs("UnitPrice"),2) & " | Delete |
")
rs.Close
else
//the problem is below somewhere 
strSQL="DELETE FROM Products WHERE ProductID=" & request.QueryString("ProductID")
oconn.execute strSQL //the error message says this part
response.Redirect("DeleteProduct.asp")
end if
oconn.close
%>
thanks 
Robbie
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well, what is the error message you're getting ? That might help....
Is this an Access db? I can't remember, it's been so long since I used Access, but don't you have to say "delete * from..." in Access, not just "delete from..." ? I could be wrong on that...
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This is ASP code, as you said. This is the ASP.NET forum, the Web Dev forum is a better place to ask this.
Christian Graus - Microsoft MVP - C++
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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What does request.QueryString("ProductID") come in as - is it a string?
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I have created a web user control with a drop down for "Main Categories" in it and a place holder.
<asp:UpdatePanel ID="pnlcategories" runat="Server">
<ContentTemplate>
<asp:DropDownList runat="Server" ID="ddlCategory" AutoPostBack="true" OnSelectedIndexChanged="ddlCategory_SelectedIndexChanged"></asp:DropDownList>
</ContentTemplate>
</asp:UpdatePanel>
<asp:UpdatePanel ID="pnlsubcategories" UpdateMode="Always" runat="Server">
<ContentTemplate>
<asp:PlaceHolder runat="server" ID="plhCategories" EnableViewState="true"></asp:PlaceHolder>
</ContentTemplate>
</asp:UpdatePanel>
In the page load, i am populating the main categories drop down.protected void Page_Load(object sender, EventArgs e)
{
if(!IsPostBack)
populateCategoryField();
}
On the selectedindexchanged event of this drop down, i have created another drop down for "Sub-Categories" dynamically and added it in the place holder.I have assigned the SelectedIndexChanged event for sub categories drop down like this,
DropDownList ddlSubCategory = new DropDownList();
ddlSubCategory.AutoPostBack = true;
ddlSubCategory.SelectedIndexChanged += new EventHandler(this.subCategories_SelectedIndexChanged);
plhCategories.Controls.Add(ddlSubCategory);
and in this method, another sub categories drop down is created.
Now when i change the selection of sub category, it is supposed to create another sub-sub-category drop down but nothing happens.
Plz anyone tell me y isnt it working?
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Dynamically created controls need to be created BEFORE page load, in order that they are in existence when the viewstate is populated ( just before page load ). Otherwise, their state is not restored, nor will their events fire.
Christian Graus - Microsoft MVP - C++
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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In my website I have used cache. In my load event of the page I check the cache .If it is null I fill a DataTable object from the database and assign that table to the cache. And then in my code I use the cache to fill the controls. Now my problem is this " sometimes I get the "Object reference not set to an instance of an object(NullReferenceException)" error. I am sure that this error is related to cache. Why this error happens sometimes only and not always . what is its cause ? Can someone help me ??
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No one can help you without seeing your code...So if possible please post sample code...
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Things to not stay in the Cache forever. Even if you don't have a timeout set for your cache if the system needs more memory it will expire something in the cache. It is a good coding practice whenever you use something from the cache to first check to make sure it is not null or Nothing in vb.net before you use it. If it is null or Nothing then you need to call the code again to populate the cache.
Hope that helps.
Ben
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kubben wrote: If it is null or Nothing then you need to call the code again to populate the cache.
I have done this but I see this error sometimes.
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Are you sure every place you use the cache object you are checking for null or nothing before you use it? It seems like you either missed a place or the only other thing I can think of is the stuff you are putting into the cache is so large that it gets kicked out of the cache pretty quickly.
Ben
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Hello All!
plz help me that how can i add the user control dynamically on a page by/after clicking a button
if i write the code in button1_click method then it shows only once and not adding after every click of the button.
UserControl uc1 = (UserControl)LoadControl("WebUserControl1.ascx");
Page.Controls.Add(uc1);
Please give me answer quickly.
Best Regards,
Mairy
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to add user control dynamically in a page, there must be a container for the control. Either a panel or place-holder web server control can act as a container for the user control.
WebUserControl1 uc =
(WebUserControl1) Page.LoadControl("WebUserControl1.ascx");
PlaceHolder1.Controls.Add(uc);
Regards
John
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also, it needs to be added before page load if you want it to have viewstate ( including events )
Christian Graus - Microsoft MVP - C++
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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I use a RegularExpressionValidator control and a RequiredFieldValidator control to validate the FileUpload control's filepath, but when I click the button to submit, the page still shows the RegularExpressionValidator's ErrorMessage which should not be shown. Why? If anyone knows, please do me a favor.
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It is hard to say without seeing your code. I am not the best at regular Expressions, but it would be my guess you have an error in your regular expression.
Ben
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Don't use any inBuilt Validator for validation just use
Javascript and get the path by this way
fileUpload1.postedFile.path
check if the path is NULL or Wrong
regards,
koolprasad2003
Be a good listener...Because Opprtunity knoughts softly...N-Joy
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