Web Forms :: Try To Catch Error "Invalidoperationexception Was Unhandled By User Code"
Jul 29, 2010
I have text box get data from dataread. Here my code:
OleDbCommand com = new OleDbCommand("select sid from TableOne where pid = " + "'" + PID.SelectedValue + "'" + " and gid = " + "'" + GID.SelectedValue + "'" + " and unitid = " + "'" + tid.SelectedValue + "'");
........
........
Txtsid.Text = myDataReader[0].ToString().Trim();
I got the run time error at line: Txtsid.Text = myDataReader[0].ToString().Trim(); Invalidoperationexception was unhandled by user code. No data exists for the row/column. How to try catching those errors?
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Similar Messages:
Jan 6, 2010
i am getting this error, trying to connect to sqlserver! senario! im trying to connect 2 tables with corresponding information.
eg: table 1 has (item no., picture and link) table 2 has (all the information pertaining to the item number and picture meaning when you click on the link it has to link you back to the same picture with more information about it! what could possibly be wrong??
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Apr 7, 2010
Look below this codes throw me : FormatException was unhandled by user code
Codes:
satis.KDV = Decimal.Parse((from o in genSatisctx.Urun where o.ID == UrunID select o.Kdv).ToString()); How can i rewrite linq query?
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Nov 19, 2010
I'm trying to throw the exception back to Page_Load but the throw statement causes error: ArgumentNullException was unhandled by user code. How can that be fixed? Also, I can't see Label1.Text displayed on the page after the ArgumentNullException occurs because the page is not re-load. If there is no exception, it's fine to not reload the page. How can I see the Label1.Text displayed?
protected void Page_Load(object sender, EventArgs e)
{
try
{
...do something here...
}
catch (ArgumentNullException ae)
{
System.Diagnostics.Debug.Write(ae.Message);
Label1.Text = ae.Message;
Label1.Style.Add("visibility", "visible");
}
catch (Exception ex)
{
...do something here...
}
}
protected void ImageButton1_Click(object sender, ImageClickEventArgs e)............................
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Jul 11, 2012
You can for example enter the length and width of the web (VS.NET2005), when it runs out of range index error exception was unhandled by user code for chieudai
Code:
public class Tinh
{
private Int32 _quanhuyen;
private String _diachiNha;
private Double _chieudai;
private Double _chieurong;
private Double _dientichDat;
}
[Code] ....
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Sep 14, 2011
I get this error in the browser:
Code:
Thread was being aborted.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Threading.ThreadAbortException: Thread was being aborted.
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
[ThreadAbortException: Thread was being aborted.]
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +486
System.Web.ApplicationStepManager.ResumeSteps(Exception error) +501
System.Web.HttpApplication.System.Web.IHttpAsyncHandler.BeginProcessRequest(HttpContext context, AsyncCallback cb, Object extraData) +123
System.Web.HttpRuntime.ProcessRequestInternal(HttpWorkerRequest wr) +379
Version Information: Microsoft .NET Framework Version:2.0.50727.3053; ASP.NET Version:2.0.50727.3053
I have try{}catch(Exception ex){} in the right place:
Code:
protected void Button1_Click(object sender, EventArgs e)
{
try
{
// all processing occurs inside here
}
catch(Exception ex)
{
}
}
I even created a global.asax file and on the Application_Error event, I wrote a code that would email me the error (and i'm not getting an email regarding that error when I get the error shown above). I know for a fact that the thread is going inside the "try" statement because I send emails to myself whenever it finishes certain codes inside of it. So how come I'm getting that error in my browser instead of it being handled in my "catch" statement? I have two problems here, one, why is the exception not going to my "catch" statement, and two, why am I getting that error in the first place.
Note: my web app calls a webservice.
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Jan 16, 2010
I downloaded a sample Rolodex from here: [URL] the file to download is at the bottom of the page and it is called 'RolodexDatalist.zip (6.71 kb)' So I changed the HTML to it points to my SQL Server DB. I changed the ConnectionString to this:
<connectionStrings>
<add name="CustomersConnectionString" connectionString="Data Source=EXCEL-4J2W8KYNPSQLEXPRESS;Initial Catalog=Customers;Integrated Security=True"
providerName="System.Data.SqlClient" />
</connectionStrings>
Now, everything points to my DB! I thought, ok great, this should be pretty easy. However, when I debug, I get this error message: 'Null reference was unhandled by user code. Object reference not set to instance of an object. Troubleshooting Tips: use the "new" keyword to set an instance of an object.' This line is yellow:
Dim conStr As String = ConfigurationManager _
.ConnectionStrings("conStr").ConnectionString
Here is the code-behind:
Imports System.Data
Imports System.Data.SqlClient
Imports System.Collections.Generic
Partial Class VB
Inherits System.Web.UI.Page
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
If Not IsPostBack Then
ViewState("CurrentAlphabet") = "ALL"
Me.GenerateAlphabets()
Me.BindDataList()
End If
End Sub
Private Sub BindDataList()
Dim conStr As String = ConfigurationManager _
.ConnectionStrings("conStr").ConnectionString
Dim con As New SqlConnection(conStr)
Dim cmd As New SqlCommand("spx_GetContacts")
cmd.Connection = con
cmd.CommandType = CommandType.StoredProcedure
cmd.Parameters.AddWithValue("@Alphabet", ViewState("CurrentAlphabet"))
con.Open()
dlContacts.DataSource = cmd.ExecuteReader()
dlContacts.DataBind()
con.Close()
If ViewState("CurrentAlphabet").ToString().Equals("ALL") Then
lblView.Text = "all Contacts."
Else
lblView.Text = "Contacts whose name starts with " & _
ViewState("CurrentAlphabet").ToString()
End If
End Sub
Private Sub GenerateAlphabets()
Dim alphabets As New List(Of Alphabet)()
Dim alphabet As New Alphabet()
alphabet.Value = "ALL"
alphabet.isNotSelected = Not alphabet.Value _
.Equals(ViewState("CurrentAlphabet"))
alphabets.Add(alphabet)
For i As Integer = 65 To 90
alphabet = New Alphabet()
alphabet.Value = [Char].ConvertFromUtf32(i)
alphabet.isNotSelected = Not alphabet.Value _
.Equals(ViewState("CurrentAlphabet"))
alphabets.Add(alphabet)
Next
rptAlphabets.DataSource = alphabets
rptAlphabets.DataBind()
End Sub
Protected Sub Alphabet_Click(ByVal sender As Object, ByVal e As EventArgs)
Dim lnkAlphabet As LinkButton = DirectCast(sender, LinkButton)
ViewState("CurrentAlphabet") = lnkAlphabet.Text
Me.GenerateAlphabets()
Me.BindDataList()
End Sub
End Class
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Jun 21, 2010
Specified argement was out of range of valid values. Parameter name i: That was my error see the code below:
[Code]....
Was is causing the error and how do I fix it?
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Mar 18, 2011
I'm working on having two forms that communicate together. In order to do this, I am passing public value from the source page. Here's how I did it:
In the source page I have:
Public ReadOnly Property CurrentCity() As String
Get
Return txtboxfake.Text
End Get
End Property
Then under page_load of the page I have:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
txtteam.Text = PreviousPage.CurrentCity
txtboxdate.Text = Calendar1.SelectedDate
End Sub
For some reason I keep getting an error that says "NullReference exception unhandled by user code" that points to txtteam.text = PreviousPage.CurrentCity.
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Oct 11, 2010
i am using the page asynchronousTask to call the wcf service which is reside in another project in same solution for that i am using following code
protected void Button1_Click(object sender, EventArgs e)
{
PageAsyncTask pat = new PageAsyncTask(BeginDoWork, EndDoWork, null, null);
Page.RegisterAsyncTask(pat);
//Page.ExecuteRegisteredAsyncTasks();
}
IAsyncResult BeginDoWork(object sender, EventArgs e, AsyncCallback acb, object extraData)
{
nor = new ServiceReference1.Service2Client();
return nor.BeginDoWork(acb ,extraData );//first null value is any call back method
//return nor.BeginProductList(acb, extraData);
}
void EndDoWork(IAsyncResult ar)
{
nor.EndDoWork(ar);
}
but in the endDoWork method it will show the following error
system.servicemodel.protocolexception was unhandled by user code
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Nov 30, 2010
I'm trying to do a master-detail by first search the database when a user click on the search button. Then display the result to a ListView control. After that, if the user click on the hyperlink, it displays the detail on the Formview control. Below are my code:
[Code]....
And here's the part that causes the error:
[Code]....
The error is on this line: string strID = ltvLusHmoob.DataKeyNames[e.Item.DataItemIndex].ToString();
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Oct 22, 2010
I am making a login page in asp.net. when am trying to fill the data into the database it can give the error..."Incorrect syntax near 'Password'." my code is
SqlConnection sqlConnection = new SqlConnection("Data Source = DELLVOSTRO; Initial Catalog = ALPHA; User Id= sa; Password= intransit");
string queryString = ("INSERT INTO LOGIN(User_Id, Password, Confirm Password, E_Mail, Security_Question, Security_Answer) VALUES ('" + CreateUserWizard1.UserName + "','" + CreateUserWizard1.Password + "','" + CreateUserWizard1.ConfirmPassword + "','"
+ CreateUserWizard1.RequireEmail + "','" + CreateUserWizard1.Question + "','" + CreateUserWizard1.Answer + "')");
sqlConnection.Open();
SqlCommand cmd = new SqlCommand(queryString, sqlConnection);
cmd.ExecuteNonQuery();
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Apr 6, 2010
smtpException was unhandled by user code
void sendMail()
{
MailMessage mail = new MailMessage();
mail.To.Add("abc@gmail.com");
mail.From = new MailAddress("abc@gmail.com", txt_name.Text);
mail.Subject = txt_subject.Text;
mail.Body = txt_body.Text;
SmtpClient smtp = new SmtpClient("smtp.gmail.com");
smtp.EnableSsl = true;
NetworkCredential yetki = new NetworkCredential("abc@gmail.com", "11111111");
smtp.Credentials = yetki;
smtp.Send(mail);
Response.Write("mailiniz baÅŸarılı bir ÅŸekilde gÃnderilmiÅŸtir");
}
protected void btn_gonder_Click(object sender, EventArgs e)
{
sendMail();
}
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Sep 19, 2010
[Code]....
If the table no data is displayed this error:
System.FormatException was unhandled by user code Message=Input string was not in a correct format.
[code]....
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Apr 4, 2011
I am getting the below exception when I run my ASP.NET/C#/SQL project on an XP box:
[code]...
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Jun 8, 2010
An unhandled exception of type 'System.InvalidOperationException' occurred in System.Xml.dll
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Jan 6, 2011
I am doing the MVC Music Store on VS 2010 and I get this expection: System.Data.EntityException was unhandled by user code Message=The underlying provider failed on Open.
Source=System.Data.Entity
StackTrace:
at System.Data.EntityClient.EntityConnection.OpenStoreConnectionIf(Boolean openCondition, DbConnection storeConnectionToOpen, DbConnection originalConnection, String exceptionCode, String attemptedOperation, Boolean& closeStoreConnectionOnFailure)
at System.Data.EntityClient.EntityConnection.Open()
at System.Data.Objects.ObjectContext.EnsureConnection()
at System.Data.Objects.ObjectQuery`1.GetResults(Nullable`1 forMergeOption)
at System.Data.Objects.ObjectQuery`1.System.Collections.Generic.IEnumerable<T>.GetEnumerator()
at System.Linq.Enumerable.Single[TSource](IEnumerable`1 source).....
It happens at the Album ablum line above. I checked and SQLExpress is running with login to Local system.
Complete code for Controller is:
[Code]....
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Mar 22, 2010
[Code]....
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May 3, 2010
I'm stuck with this query. I've tried a lot but ended up with no clue. Here is my sql query which is worrying me.. sqlselect = "select qo.OrderDate,qo.RequiredDate,qo.ShippedDate" & _
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Jun 1, 2010
I did executed a db - contact form page successfully in the same project with the same connection string, but for this page its doing error and so I commented the binary file saving codes and all and put just simple 2 fields to see if the db is connecting and surprisingly getting sqlexception error and no data is written to the db. I am using sqlexpress 2005 and VS 2008. After this code I am listing the error I got.
Imports System.Data.SqlClient
Imports System.IO.FileInfo
Imports System.Data
Partial Class picture2
Inherits System.Web.UI.Page
Protected Sub upButton_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles upButton.Click
'' SOME CODES ARE HERE
Dim ctr As Integer = 0
Dim fleName As String
Dim fleLength As Integer
fleName = FileUpload1.FileName
fleLength = FileUpload1.PostedFile.ContentLength
Dim fleDatasource As New SqlDataSource
fleDatasource.ConnectionString = ConfigurationManager.ConnectionStrings("CandidatesConnectionString").ToString()
fleDatasource.InsertCommandType = SqlDataSourceCommandType.Text
fleDatasource.InsertCommand = "INSERT INTO Picture (picLength,picName) values (&picLength, &picName)"
fleDatasource.InsertParameters.Add("picLength", fleLength)
fleDatasource.InsertParameters.Add("picName", fleName)
fleDatasource.Insert()
----------------------- executed and now the prg returns to my code with the following sqlexception error box and while expanded I got this info ------------------------
message - Incorrect syntax near "&"
Line number 1
Errorcode -2146232060
in order to evaluate an indexed property, the property must be qualified and the arguments must be explicitly supplied by the user. fleDatasource.Insert() the prg stops in the code with the green highlight on the fleDatasource.Insert().
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Mar 1, 2011
private
static
void ReadKey(SymmetricAlgorithm
algorithm)
{
byte[] converted =
Convert.FromBase64String(ConfigurationManager.AppSettings["Key"]);
byte[] bytes =
UnicodeEncoding.ASCII.GetBytes(("$@|T"));
algorithm.Key = ProtectedData
.Unprotect(
converted,
bytes,
DataProtectionScope.LocalMachine);
}
I am getting the following exception "Key not valid for use in specified state"
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Jan 25, 2010
I am useing sql and vwd.
i created the db on sql and used database explorer to connect it to vwd.
it keeps failing at step 5 (con.open())
i think i listed all relevant code, but if i missed something let me know and ill post it.
what am i missing.
[code]....
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Jan 20, 2011
"System.FormatException was unhandled by user code - Input string was not in a correct format"
This is driving me crazy! Can anyone see what the problem is?
[Code]....
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Feb 1, 2010
i've got some problem reading excel files to store into sqlserver database. currently my code has a fileupload control and a button for me to save the excel file into a folder and read the data inside the excel file and write it into the sql database. The code works only if the excel sheet name is Sheet1.xlsx, however i tried upload a diff file named ImportUserFile.xlsx and it gave me the exception below. 'ImportUserFile$' is not a valid name. Make sure that it does not include invalid characters or punctuation and that it is not too long. i have also tried other file names and it seemed only Sheet1.xlsx works.
[Code]....
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Feb 7, 2010
Here is the code copied from [URL] In asp.net code behind, I use try-catch try to catch any error but never catch it. In SQL database, if I rename Employees to Employeesx or change column DepartmentID to DepartmentIDx, record will not be deleted (it is right) without any error (it is wrong, suppose catch an error).
CREATE PROCEDURE DeleteDepartment
(
@DepartmentID int
)
AS
BEGIN TRANSACTION
DELETE FROM Employees
WHERE DepartmentID = @DepartmentID
IF @@ERROR <> 0
BEGIN
ROLLBACK
RAISERROR ('Error', 16, 1)
RETURN
END
DELETE FROM Departments
WHERE DepartmentID = @DepartmentID
IF @@ERROR <> 0
BEGIN
ROLLBACK
RAISERROR ('Error', 16, 1)
RETURN
END
OMMIT
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