ASP.NET

Re: Error with ASP.NET 2.0

3-Nov-07 11:00

It looks like ASP.NET isn't registered within IIS, so IIS doesn't know what to do with a request for an ASPX page.

Read this article[^] and it should tell you what to do.

Paul Marfleet

"No, his mind is not for rent
To any God or government"
Tom Sawyer - Rush

nickabradley3-Nov-07 12:00

nickabradley

3-Nov-07 12:00

I think I got that error fixed, had to set the type of ASP.NET in my IIS. However I am now getting the following errors:

Event Type: Error
Event Source: ASP.NET 2.0.50727.0
Event Category: None
Event ID: 1088
Date: 11/3/2007
Time: 5:10:06 PM
User: N/A
Computer: LAPPY3
Description:
Failed to execute request because the App-Domain could not be created. Error: 0x80131902

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

Event Type: Warning
Event Source: ASP.NET 2.0.50727.0
Event Category: None
Event ID: 1073
Date: 11/3/2007
Time: 5:10:06 PM
User: N/A
Computer: LAPPY3
Description:
Failed to initialize the AppDomain:/LM/W3SVC/1/ROOT

Exception: System.Configuration.ConfigurationErrorsException
Message: Exception of type 'System.Configuration.ConfigurationErrorsException' was thrown.
StackTrace: at System.Web.Configuration.ErrorRuntimeConfig.ErrorConfigRecord.System.Configuration.Internal.IInternalConfigRecord.GetLkgSection(String configKey)
at System.Web.Configuration.RuntimeConfigLKG.GetSectionObject(String sectionName)
at System.Web.Configuration.RuntimeConfig.GetSection(String sectionName, Type type, ResultsIndex index)
at System.Web.Configuration.RuntimeConfig.get_HostingEnvironment()
at System.Web.Hosting.HostingEnvironment.StartMonitoringForIdleTimeout()
at System.Web.Hosting.HostingEnvironment.Initialize(ApplicationManager appManager, IApplicationHost appHost, IConfigMapPathFactory configMapPathFactory, HostingEnvironmentParameters hostingParameters)
at System.Web.Hosting.HostingEnvironment.Initialize(ApplicationManager appManager, IApplicationHost appHost, IConfigMapPathFactory configMapPathFactory, HostingEnvironmentParameters hostingParameters)
at System.Web.Hosting.ApplicationManager.CreateAppDomainWithHostingEnvironment(String appId, IApplicationHost appHost, HostingEnvironmentParameters hostingParameters)
at System.Web.Hosting.ApplicationManager.CreateAppDomainWithHostingEnvironmentAndReportErrors(String appId, IApplicationHost appHost, HostingEnvironmentParameters hostingParameters)

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

Working on trying to solve them, any help you can provide would be welcomed.

Runtime Creation Of Button+Adding Events+Sourabh

Dot Net Jantu3-Nov-07 9:17

Re: Runtime Creation Of Button+Adding Events+Sourabh

3-Nov-07 9:17

Hi All,
I have created a button at runtime on form load:

Dim btnSave As New Button<br />
btnSave.BackColor = Drawing.Color.Maroon<br />
btnSave.ForeColor = Drawing.Color.White<br />
btnSave.Text = "Save"<br />
ButtonHolder.Controls.Add(btnSave)

I Have also added a code to it as :

Public Sub btnhandler_click(ByVal sender As Object, ByVal e As EventArgs) Handles btnhandler.Click<br />
        Response.Write("clicked")<br />
End Sub

but this second event code does not execute when i click on the button.
Reason???

Thanks and Regards,

pmarfleet3-Nov-07 9:24

Re: Runtime Creation Of Button+Adding Events+Sourabh

3-Nov-07 9:24

You haven't wired up the eventhandler to the Click event of your dynamically-created control. Use the AddHandler[^] statement to do this.

Paul Marfleet

"No, his mind is not for rent
To any God or government"
Tom Sawyer - Rush

Dot Net Jantu3-Nov-07 9:34

Re: Runtime Creation Of Button+Adding Events+Sourabh

3-Nov-07 9:34

How do we do that? Like this?

AddHandler btnSave.Click, btnhandler_click(ByVal sender As Object, ByVal e As EventArgs)

this code give me error as "expression expected" by underlining the ByVal

And where do we do that?

I have also added this

Protected WithEvents btnsave As System.Web.UI.WebControls.Button

and modified the below code:
Public Sub btnhandler_click(ByVal sender As Object, ByVal e As EventArgs) Handles btnSave.Click
Response.Write("clicked")
End Sub

Thanks and Regards,

pmarfleet3-Nov-07 9:49

Re: Runtime Creation Of Button+Adding Events+Sourabh

3-Nov-07 9:49

Dot Net Jantu wrote:
How do we do that? Like this?

AddHandler btnSave.Click, btnhandler_click(ByVal sender As Object, ByVal e As EventArgs)

this code give me error as "expression expected" by underlining the ByVal

And where do we do that?

Did you read the article? The sample code shows you how to dynamically assign an event handler to an event. You're code doesn't look anything like that in the article so it's not surprising that it doesn't work. I suggest that you implement your code in line with the article instead of just making up something that isn't even syntactically correct.

Dot Net Jantu wrote:
Public Sub btnhandler_click(ByVal sender As Object, ByVal e As EventArgs) Handles btnSave.Click
Response.Write("clicked")
End Sub

The Handles keyword is unnecessary if the event handler is only being used for controls that are created dynamically. However, if you have a control called btnSave defined in your ASPX page then you would want to use it.

Paul Marfleet

"No, his mind is not for rent
To any God or government"
Tom Sawyer - Rush

Dot Net Jantu3-Nov-07 10:01

Re: Runtime Creation Of Button+Adding Events+Sourabh

3-Nov-07 10:01

Thanks,
its working now..
I have one more problem, in the page load i have written this

Dim txtname As TextBox<br />
        txtname = New TextBox<br />
        txtname.AutoPostBack = False<br />
        txtname.BackColor = Drawing.Color.AliceBlue<br />
        txtname.BorderColor = Drawing.Color.Black<br />
        nameHolder.Controls.Add(txtname)

but in the event:
Public Sub btnhandler_click(ByVal sender As Object, ByVal e As EventArgs)
' when i type "txtn" and try for intelisence, it dosent show the control.
End Sub

Regards

Thanks and Regards,

pmarfleet3-Nov-07 10:20

Re: Runtime Creation Of Button+Adding Events+Sourabh

3-Nov-07 10:20

The variable txtname has been defined locally in another procedure. It doesn't have scope in your event handler procedure so it won't appear in intellisense.

To get a reference to the TextBox control that has raised the event, you need to call FindControl on the control that contains the TextBoxes. You should define some naming convention for each TextBox you dynamically create so that you have a means of obtaining a reference to each one by name.

Paul Marfleet

"No, his mind is not for rent
To any God or government"
Tom Sawyer - Rush

Dot Net Jantu3-Nov-07 10:30

Re: Runtime Creation Of Button+Adding Events+Sourabh

3-Nov-07 10:30

I am doing it like this:

but its wrong. I didt understand what you wanted to say, please correct me.

dssave.Tables("dtUsers").Rows(0)("UserName") = nameHolder.FindControl(txtname.Text.Trim)

it gives an error.
Object reference not set to an instance of an object.

Thanks and Regards,

pmarfleet3-Nov-07 10:48

Re: Runtime Creation Of Button+Adding Events+Sourabh

3-Nov-07 10:48

Dot Net Jantu wrote:
ssave.Tables("dtUsers").Rows(0)("UserName") = nameHolder.FindControl(txtname.Text.Trim)

it gives an error.
Object reference not set to an instance of an object.

Yes, it will. To know why, you need to read the MSDN documentation to understand how the FindControl method works. Have you done this?

Paul Marfleet

"No, his mind is not for rent
To any God or government"
Tom Sawyer - Rush

Dot Net Jantu3-Nov-07 11:06

Re: Runtime Creation Of Button+Adding Events+Sourabh

3-Nov-07 11:06

as per the msdn documentation, I have done this..
Dim name As TextBox = nameHolder.FindControl("txtname")

also I had done this

If (Not name Is Nothing) Then
' Get name's parent.
Dim myControl2 As Control = name.Parent
Response.Write("Parent of the text box is : " & myControl2.ID)
Else
Response.Write("Control not found.....")
End If

and its showing as control not found..

Thanks and Regards,

pmarfleet3-Nov-07 11:12

Re: Runtime Creation Of Button+Adding Events+Sourabh

3-Nov-07 11:12

Dot Net Jantu wrote:
and its showing as control not found..

Have you actually added a control to the Controls collection of nameHolder with the ID 'txtname'?

Paul Marfleet

"No, his mind is not for rent
To any God or government"
Tom Sawyer - Rush

Dot Net Jantu3-Nov-07 11:20

Re: Runtime Creation Of Button+Adding Events+Sourabh

3-Nov-07 11:20

if this is what you mean then yes.

Dim txtname As TextBox
txtname = New TextBox
txtname.AutoPostBack = False
txtname.BackColor = Drawing.Color.AliceBlue
txtname.BorderColor = Drawing.Color.Black
nameHolder.Controls.Add(txtname)

Thanks and Regards,

pmarfleet3-Nov-07 11:29

Re: Runtime Creation Of Button+Adding Events+Sourabh

3-Nov-07 11:29

Dot Net Jantu wrote:
Dim txtname As TextBox
txtname = New TextBox
txtname.AutoPostBack = False
txtname.BackColor = Drawing.Color.AliceBlue
txtname.BorderColor = Drawing.Color.Black
nameHolder.Controls.Add(txtname)

The description of the Control.FindControl which you said you had read, is as follows:

Searches the current naming container for a server control with the specified id parameter.

You haven't set the ID property for your control. The fact that you have declared a variable called txtname and set it with a reference to your dynamically created TextBox object is not relevent.

Paul Marfleet

"No, his mind is not for rent
To any God or government"
Tom Sawyer - Rush

Dot Net Jantu3-Nov-07 19:45

Re: Runtime Creation Of Button+Adding Events+Sourabh

3-Nov-07 19:45

hey thanks it worked.
I would like to know that do i need to assign a id for the button also?
And one more thing will i have to use that find control method in each and every procedure to retrieve the vbalue of the control?

Thanks and Regards,

pmarfleet3-Nov-07 23:05

Re: Runtime Creation Of Button+Adding Events+Sourabh

3-Nov-07 23:05

Dot Net Jantu wrote:
I would like to know that do i need to assign a id for the button also?

You probably should do. You will need to if you want to locate instances of the Button control calling FindControl on the container object.

Dot Net Jantu wrote:
And one more thing will i have to use that find control method in each and every procedure to retrieve the value of the control?

Yes, if you don't already have a reference to one of the controls you will need to call the FindControl method on the container object, passing in its ID to find it.

Paul Marfleet

"No, his mind is not for rent
To any God or government"
Tom Sawyer - Rush

Christian Graus3-Nov-07 12:19

Christian Graus

3-Nov-07 12:19

Apart from what you've already been told, the button needs to be created in the LoadViewState function so that it exists early enough in the page lifecycle for the viewstate to be restored and the event to fire.

Passing argument to function

csinva3-Nov-07 8:36

csinva

3-Nov-07 8:36

I learning and have a problem this topic. Here is what I'm tryig to figure out in my head. I need to pass a function the name "Joe" and then have the function look it up in the database and return it back so it can go inside a text vale.

Here is the example I'm work through. I can't seem to get it to work so I need to make sure I understand how to pass arguments and return them.

Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click

Dim name as String = "Joe"
Dim Userid as Integer

GetUserID(name, result_sUserID)

result_sUserId = txtUserid.text

End Sub

Public Function GetUserID(ByVal name As String, result_sUserID As Integer) As Integer

.... datbase connection stuff
.... userid as int32 in database

sUserID = Convert.ToInt32(myCommand.ExecuteScalar())

Return

Result_sUserID = sUserID

End Function

Chris Stewart

www.pluginforsuccess.com

pmarfleet3-Nov-07 9:03

3-Nov-07 9:03

The second argument to GetUserID is unnecessary as your function only needs to return 1 value. Change Return to Return sUserID and remove the following line. Modify the calling code to assign the value returned by the function to a variable.

Paul Marfleet

"No, his mind is not for rent
To any God or government"
Tom Sawyer - Rush

csinva3-Nov-07 9:12

csinva

3-Nov-07 9:12

So I do that

GetUserID(Subdomain)
'Populate lblUserId with result_sUserID
Dim sUserID As Integer
sUserID = lblUserID.Text

sUserID = Convert.ToInt32(myCommand.ExecuteScalar())

objConnection.Close()
Return sUserID

and I get the following error message:

[FormatException: Input string was not in a correct format.]
Microsoft.VisualBasic.CompilerServices.Conversions.ParseDouble(String Value, NumberFormatInfo NumberFormat) +211
Microsoft.VisualBasic.CompilerServices.Conversions.ToInteger(String Value) +84

[InvalidCastException: Conversion from string "" to type 'Integer' is not valid.]
Microsoft.VisualBasic.CompilerServices.Conversions.ToInteger(String Value) +238
UrlCompare.Button1_Click(Object sender, EventArgs e) in C:\inetpub\wwwroot\UrlCompare.aspx.vb:34
System.Web.UI.WebControls.Button.OnClick(EventArgs e) +105
System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +107
System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +7
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +11
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +33
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5102

Chris Stewart

www.pluginforsuccess.com

pmarfleet3-Nov-07 9:21

3-Nov-07 9:21

csinva wrote:
Dim sUserID As Integer
sUserID = lblUserID.Text

sUserID = Convert.ToInt32(myCommand.ExecuteScalar())

This bit of code doesn't make any sense. Why do you assign a value to sUserID in one line and then reassign the value in the next line. Surely this is unnecessary?

I assume the code crashes on the first assignment. You can't implicitly cast a string value to an Integer. If the value of lblUserID.Text is an empty string obviously there is no numeric equivalent. You should use Integer.TryParse to perform type conversions if you don't know in advance that they will be successful.

Paul Marfleet

"No, his mind is not for rent
To any God or government"
Tom Sawyer - Rush