What Is The Use Of System Environment Class And What Is An Object Pool
Apr 1, 2010I wanted to know what is the use of System. Environment class and what is an object pool in .Net?
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[Code].....
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also After Post-back (Button Click)
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[Code]....
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using System.Data;
using System.Collections;
using System.Globalization;
using System.Data.SqlClient;
using System.Collections.Generic;
using System.Globalization;
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{
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When i try to send mail using System.Net.Mail in Web Application, the following problem occurs:
Server Error in '/EmailTeste' Application.
Object reference not set to an instance of an object.
Description:
An unhandled exception occurred during the execution of the current web request. review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.
Source Error:
[Code]....
[code]....
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System.NullReferenceException: Object Reference Not Set To An Instance Of An Object.
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Private Sub fill_ddl_Dist(ByVal _query As String)
Dim con As Connection
con = New Connection
TIP: When you are writing your question, there is a button on the tool bar that wraps the [code] tags around your copy/pasted code. Its the button with a '#' on it. More on tags. They're cool. Check'em out.
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[Code]....
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myConnection.Open();
myReader = myCommand.ExecuteReader();
When I try to retreive from the reader as follows:
while (myReader.Read())
{
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}
I get the following error
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DataSource Controls :: Unable To Cast Object Of Type 'System.DBNull' To Type 'System.String'
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public List<Staff> GetStaff()
cmd.CommandType =
SqlConnection con =
new
SqlConnection(connectionstring);SqlCommand cmd =
new
[code]...
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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'.
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Unable To Cast Object Of Type 'System.EventArgs' To Type 'System.Web.UI.WebControls.FormVi
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on line #2
private void download(DataTable dt) { Byte[] bytes = (Byte[])dt.Rows[0]["FileData"];
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Sep 17, 2010[Code]....
System.InvalidCastException was unhandled by user code
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Source=System.Data.Linq
System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execut
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sp.Price = Convert.ToDecimal(collection.GetValue("Price"));
sp is :
SPecials_Templates sp = new SPecials_Templates();
SPecials_Templates Defined:
[MetadataType(typeof(SPecials_TemplatesMetaData))]
public partial class SPecials_Templates
{
public class SPecials_TemplatesMetaData
{
[ScaffoldColumn(false)]
public object Key { get; set; }
[StringLength(50)]
public object Template_Name { get; set; }
[StringLength(12)]
public object Headline { get; set; }
[StringLength(12)]
public object headline2 { get; set; }
[StringLength(160)].......
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Nov 12, 2010I have a web site that is using windows authentication. 'Enable anonymous access' is unchecked. It works when I call it through Visual Studio but when I put the site on the server I get the following error:
Unable to cast object of type 'System.Security.Principal.GenericPrincipal' to type 'System.Web.Security.RolePrincipal'.
Here is the offending line:
System.Security.Principal.GenericPrincipal genericPrincipal = (System.Security.Principal.GenericPrincipal)HttpContext.Current.User;
Use System.Web.Mvc From Class Library?
Jun 4, 2010I'm working on an ASP.NET MVC application, but I'm trying to remove everything but Controller code from my project and put it in it's own Class Library. I've got some code that is using System.Web.Mvc; But it doesn't seem to be letting me access it. I have Referenced the System.Web Namespace in the project. Bassically I'm getting errors on the iActionFilter and the FilterAttribute stuff.
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