Web Forms :: Cast String To Panel Object?
Mar 5, 2011
I'm a noob to ASP.Net and I'm working on a simple project. In this project I have 2 drop down lists.In one drop down list I would like to select a panel web control and with the other select the background color for that panel.I can change the background color by calling the method Color.FromName() but selecting the panel object by casting it to a panel object from a string in a drop down list is stomping me.This is my starting code:
protected
void
Button1_Click(object[code].....
View 2 Replies
Similar Messages:
Mar 24, 2010
i am using this code for send data to view
[Code]....
Controller e 'System.Collections.Generic.IEnumerable [Code]....
by this code i am render view
[Code]....
after run the application i got this error
Unable to cast object of type 'System.String' to type 'System.Collections.Generic.IEnumerable`1[BentaAccounting.Models.Repository.AllData]'.
View 5 Replies
Oct 1, 2010
Basically, what I did is that: I have a table in SQL database and some of data fields allow null. I built Objectdatasource through dataset. When I built update page using dataset. It generate the following error before showing the update page correctly. It seems I have issue to retrieve the null value from the database through using objectdatasource through dataset. Any suggestions?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
View 6 Replies
Nov 10, 2010
[Code]....
Above is my code. The error I'm get is, Unable to cast object of type 'System.DateTime' to type 'System.String'.
The column "To" and column "Subject" are strings and column "Receive" is DateTime. I can't made any changes in the database, so I need to write some code to handle casting a string to datetime or if statement as a work around.
View 6 Replies
Feb 20, 2013
Unable to cast object of type 'System.String' to type 'System.Byte[]'....
on line #2
private void download(DataTable dt) { Byte[] bytes = (Byte[])dt.Rows[0]["FileData"];
Response.Buffer = true; Response.Charset = "";
View 1 Replies
Feb 16, 2010
I have defined an ODBC Command and ODBCdatareader as follows
OdbcConnection myConnection = new OdbcConnection(connectionString);
OdbcCommand myCommand = new OdbcCommand();
myCommand.Connection = myConnection;
myCommand.CommandText = "select UOPGM from GREG.TUSROPTF";
OdbcDataReader myReader;
myConnection.Open();
myReader = myCommand.ExecuteReader();
When I try to retreive from the reader as follows:
while (myReader.Read())
{
string someString = myReader["UOPGM"];
lstNames.Items.Add(someString);
}
I get the following error
Error reading the database. Unable to cast object of type 'System.Byte[]' to type 'System.String'."
I have also tried string someString = (string)myReader["UOPGM"]; to no avail
View 4 Replies
May 28, 2010
I am trying to write a table output from SQL database to a gridview/ Data List through an Object Data Source. I am a new starter and your help will be useful.
public List<Staff> GetStaff()
cmd.CommandType =
SqlConnection con =
new
SqlConnection(connectionstring);SqlCommand cmd =
new
[code]...
View 4 Replies
Sep 17, 2010
[Code]....
System.InvalidCastException was unhandled by user code
Message=Unable to cast object of type 'System.Guid' to type 'System.String'.
Source=System.Data.Linq
System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execut
View 4 Replies
Sep 9, 2010
Object cannot be cast from DBNull to other types. 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.InvalidCastException: Object cannot be cast from DBNull to other types. Source Error:
[Code]....
Line 292:
Line 293: If DataBinder.Eval(e.Row.DataItem, "Casette") IsNot Nothing Then
Line 294: stcassette += Convert.ToDecimal(DataBinder.Eval(e.Row.DataItem, "Casette"))
Line 295: End If
Line 296:
View 6 Replies
Mar 10, 2010
There are two dropdowns for date (Fromdate and Todate) in my webpage and by default when the page loads for the first time the dropdowns loads with the last date (currentdate), if I select some previous date in Fromdate dropdown and reload the page then it displays runtime i.e.
Object cannot be cast from DBNull to other types.
Following code is written under GridView RowDataBound Event.
[Code]....
The error found at following line:
less7daysTotal += Convert.ToInt32(DataBinder.Eval(e.Row.DataItem, "less7days"))
If I comment this line then the error moves to next line till following line.
grt28daysTotal += Convert.ToInt32(DataBinder.Eval(e.Row.DataItem, "grt28days"))
I fruther want to inform that some columns in the grid are showing 0 if there is no record but I replaced 0 to - then some 0s replaced and some not. What is the reason?
View 30 Replies
Mar 3, 2010
I need some help on the row updating for a gridview that i bind manually to a list, not using objectdatasource or sqldatasourcehere is my rowupdating. What i want to do for now is just get the values from the textboxes and I will store them to sting variables then I will call my update function and pass those as parameters. How do I get the data from the textboxes that the user just edited. I have the following but I am getting an error: "unable to cast object of type System.UI.LiteralControl to type System.UI.TextBox
View 5 Replies
Jan 28, 2010
I'm using vb and after i converted it from C# and tried to implement this:
[Code]....
I got an error that said: Unable to cast object of type 'System.Web.UI.WebControls.GridView' to type 'System.Web.UI.WebControls.LinkButton'.
And here's my code for the gridview table.
[Code]....
I've tried altering the code here and there but it never work
Protected Sub GridView1_RowCommand(ByVal sender As Object, ByVal e As GridViewCommandEventArgs)
View 5 Replies
Mar 12, 2010
How can I cast from object to GUID in asp.net???
View 4 Replies
Aug 2, 2010
here's my code...
select SUM(PETTYAMOUNT) AS tot FROM FINPETTY WHERE PETTYAMOUNT IS NOT NULL AND CENTER = '1'
if (drReadera.HasRows)
{
double totamta = Convert.ToDouble(drReadera["TOTALSUMA"]);
Label2.Text = String.Format("{0:N2}", totamta);
}
note: some of the pettyamount is null that's why i've got an error in page.
View 3 Replies
Sep 14, 2010
Case "System.Int32"
Return Convert.ToInt32(a) + Convert.ToInt32(b)
Object cannot be cast from DBNull to other types
View 3 Replies
Oct 31, 2010
here's my error...
Exception Details: System.InvalidCastException: Object cannot be cast from DBNull to other types.
here's my code.
double totald = Convert.ToDouble(drReaderdeduc["TAMT"]);
totaldeduc.Text = String.Format("{0:N2}", totald);
the problem is the query output is null but i convert.todouble so got an error... what is the best solution if the record is null?
View 2 Replies
Dec 8, 2010
using vs2008 and building a web app. On a asp page called blackjack.aspx, I have four labels with id of lbBJTStatusP1 lbBJTStatusP2 lbBJTStatusP3 lbBJTStatusP4.I want to address those labels in a single sub by casting the casting two strings into the control name, so that string lbBJTStatusP & "1" would refer to lbBJTStatusP1.This is done on the code behind page. So far I have tried this but with no success. boxct refers to either "1" "2" "3" or "4".DirectCast(blackjack.Controls.Find("lbBJTStatusP" & boxct, True)(0), Label).BackColor = stoodcolor
View 1 Replies
May 21, 2010
System.InvalidCastException was unhandled by user code
Message=Specified cast is not valid.
Source=App_Web_donate.aspx.cdcab7d2.wqdohvu3
StackTrace:
at Donate.LoadUserDetails() in C:UsersSimonDesktopLocal SitesCats ProtectionNewDonate.aspx.vb:line 261
at Donate.btnDonate30_Click(Object sender, EventArgs e) in C:UsersSimonDesktopLocal SitesCats ProtectionNewDonate.aspx.vb:line 205
at System.Web.UI.WebControls.LinkButton.OnClick(EventArgs e)
at System.Web.UI.WebControls.LinkButton.RaisePostBackEvent(String eventArgument)
at System.Web.UI.WebControls.LinkButton.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument)
at System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument)
at System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData)
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
InnerException:
I have made the important bits Bold I have the following code which is generating this error:
[Code]....
I am not entirely sure what is causing it. Its completley intermitent. I am storing all the details of a user filling in a form in a structure, and then assigning that structure to a session variable. This means if they page back, and then page forward again, I can pre-populate the form with the details they have already filled in for their conveinience by using the above code snippet. It appears that it works for a good minute, but if I leave the browser alone any longer than roughly 60 seconds, and then try and page forward to the form again, the exception will fire. While writing this post, the exception has occured in again in firefox, but interestingly, Google Chrome doesn't seem to have this problem. It looks like I can leave chrome alone for as long as I want and it will still work.
View 6 Replies
Sep 8, 2010
3rd party ASP.Net web site and web service installed. The code appears not to log errors to server log or custom error log.
User receives the following critical untrapped error message:
"System.Web.Services.Protocols.SoapException: Unable to cast object of type 'System.Security.Principal.WindowsIdentity' to type 'Library.Security.Identity'. at ....."
Of course I understand the type cast issue but why would a IIS recycle resolve the issue?
View 1 Replies
May 24, 2010
I have a webpage, i have a usercontrol in it , its name ispersonal1, i have tow Radiobutton in this usercontrol, the id of one of them ismale and the other one is female, it is obviously that each time we fill one of these radiobuttons and the other one will be null,in my database the type of these fields are bit , and they have allow null, i defined a property for my usercontrol like this:
public bool male
{
get
[code]...
View 2 Replies
Mar 27, 2011
what is wrong with this syntax datatable temp = (DataTable)du.Rows[0]["NAME"] I get the error message Unable to cast object of type 'System.String' to type 'System.Data.DataTable'.
View 6 Replies
Feb 6, 2011
My code is:
[code]....
When I run the program, an error occurs:
Unable to cast object of type 'System.Collections.Generic.List`1[System.Int32]' to type System.Int32[]'.
Why does this error occur?
View 2 Replies
Mar 28, 2011
I have a database table called Animals which I drag on to my Linq to SQL DBML file.
This creates me a class called Animal.
I then create a class to extend it, like so:
public partial class Animal{
//my extra code here
}
But what I also want to do is have a class like this:
public class Zebra : Animal{
//even more extra code here
}
The trouble is I get an InvalidCastException from my repository, when I do this:
Animal a = dataContext.Animals.Where(c=>c.id.Equals(id)).SingleOrDefault();
return (Zebra)a;
I've stripped back my classes to the point where they're completely empty in an attempt to work why it doesn't work. To no avail.
This casting process did used to work in the non-LINQ-2-SQL project that I'm switching to MVC/LINQ.
View 1 Replies
Jan 4, 2010
have an issue with a list box. I populate the list box using :
listbox1.datasource = myCollectionOfCars
listbox1.databind()
When i go to retrieve the selected item from the listbox using
Car myCar = (Car)listbox1.selecteditem;
an error is generated
cannot cast expression type system.web.ui.webcontrols.listitem to type car
i have read several tutorials and many of them use the above code.
View 11 Replies
Jun 30, 2010
I have implemented rights based security as I describe here: http://forums.asp.net/p/1380280/2916291.aspxThis has been working well for awhile now, but I am moving the site to IIS 7 and encountering problems. I am able to reach the login screen for my app - but upon login get this error: "Unable to cast object of type 'System.Web.Security.RolePrincipal' to type 'RightsLib.RightPrincipal'."As described in the linked post, I have a "RightsLib.dll" that contains the relevant classes like "RightsHttpModule.cs", "RightPrincipal.cs" etc...My app no longer seems to be able to work with RightsLib.dll. RightsLib.dll resides in the bin directory of my app, and I have a reference to it in my project.me what I'm doing wrong, or what has changed to affect this in IIS 7?The only relevant entry in Web.config I'm aware of.
[Code]....
View 1 Replies
