C# - Attempting To Edit An Item That Doesn't Exist?
Feb 2, 2011
I currently have this controller function:
public ViewResult Edit(int id)
{
//get user from id
var user = _adminRepository.GetUser(id);
return View(user);
}
This currently gives me an error on my view page if I attempt to edit an item with an id of 100, when there is no user with an id of 100 in the database. What's the best practice for handling this? Send them to a Create page, or show a friendly error message? Should that redirect functionality be within the controller function?
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Aug 9, 2010
I have a listview set up in "flow" mode where the existing records are all on an extended page so you can scroll down to any record.
The InsertItem Template is in the first position, making it easy to insert a new record.
And one can scroll down the page to any record, click the edit button and update that record -- nice having everything on one scrollable page.
I am running into a problem with validations. I have validation controls restricting inputs for all the textboxes on the Insert Item template. They work fine. And on Item Inserted I am running a page validation:
Page.Validate()
If Not Page.IsValid Then
e.Cancel = True
End If
which works fine also.
The problem occurs when I scroll down to an existing record, and go to edit it. I have all the same validation constraints on the textboxes for the EditItemTemplate as I have on the InsertItemTemplate. But I cannot successfully do a page validation on updating the record. The code I am using on update is:
Protected Sub LVRentals_ItemUpdating(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.ListViewUpdateEventArgs) Handles LVRentals.ItemUpdating
Page.Validate()
If Not Page.IsValid Then
e.Cancel = True
End If
End Sub
This results in a Cancel even if there are no validation errors on the InsertItemTemplate because the Page.Validate() seems to be causing the InsertItemTemplate to think its fields should be filled out also.
Here is the code for a typical entry of the InsertItem Template:
[code]....
All the controls in the Edit Item template are part of ValidationGroup "edit1" and those of the InsertItem Template are part of ValidationGroup "edit2"
How can I get around receiving validation errors on the InsertItem Template when I am trying to validate just the EditItemTemplate when both are present on the page?
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Jul 16, 2010
I get this error: Description: An error occurred during the compilation of a resource required to service this request. review the following specific error details and modify your source code appropriately. Compiler Error Message: CS0234: The type or namespace name 'Xml' does not exist in the namespace 'System' (are you missing an assembly reference?) Source Error:
[Code]....
Line 15: using System.Web.Services.Protocols;
Line 16: using System.ComponentModel;
Line 17: using System.Xml.Serialization;
Line 18:
Line 19:
Source File: c:WindowsMicrosoft.NETFrameworkv4.0.30319Temporary ASP.NET Files
oot4db438488b8d9090App_WebReferences.j5ljvr6f.0.cs
Line: 17
I have this in my web.config:
<compilation debug="true" strict="false" explicit="true" ><!--targetFramework="4.0"-->
<assemblies>
<clear />
<add assembly="System.Web, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>
<add assembly="System.Web.Services, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>
<add assembly="System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>
<add assembly="System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
<add assembly="System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
<add assembly="System.Web.Extensions.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
</assemblies>
</compilation>
<pages controlRenderingCompatibilityVersion="3.5" clientIDMode="AutoID">
[Code....]
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Feb 9, 2010
my application in vs2005 / 2.0 framework , right now i change it with VSD08 /3.5 framework according when i change it open it with 08 at first time it get ask me ( you want to convert the application framework 2.0 to 3.5 ) i said yes , after that i was trying to run the application it get works on that machine means on ( locahost) but not able to access that on netowork its shows an error:
The name 'xxx' does not exist in the current context ( if i try to run any function within app_code ) then it shows me shuch error i wan also rebuild my appliciton , but noting get happen shall i create a new project and then copy my old code?
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May 11, 2010
i have uploaded all of my release mode published dll's and aspx to the server, but when i access the site from local machine its giving error as
Parser Error
Description:
An error occurred during the parsing of a resource required to service this request. review the following specific parse error details and modify your source file appropriately.
Parser Error Message: The file '/ProjectName/Index.aspx.cs' does not exist.
Source Error:
[Code]....
may i know how to solve this problem?
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Dec 30, 2010
I am creating a project in which i want to display my web page in full screen & Does not allow the end user to ext the full screen until he/she press the button. I google/bing but i dint get any help full material. Even i use this code
[Code]....
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Aug 25, 2010
I am having a dropdown list in the aspx page as
<asp:DropDownList ID="ddlItems" runat="server"></asp:DropDownList>
but when i refer the ddlItems in page_load i am getting "Error 1 The name 'ddlItems' does not exist in the current context.
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Dec 31, 2010
I have Attendance Table for students and im using stored procedure for add attendance:
1 means attend
0 means absent
DID STDNo L1 L2 L3 L4 L5 L6 L7 Date
1 2334 1 1 1 1 1 1 0 1 12/30/2010
date datatype is nvarchar(50)
stored procedure :
ALTER procedure [dbo].[AddDailyAttendance]
(
@STDNo nvarchar(6),
@L1 int,
@L2 int,
@L3 int,
@L4 int,
@L5 int,
@L6 int,
@L7 int,
@Date nvarchar(50),
)
as
insert into Att_AddDaily (STDNo,L1,L2,L3,L4,L5,L6,L7,Date)values(@STDNo,@L1,@L2,@L3,@L4,@L5,@L6,@L7,@Date)
when i add attendance for example : to student number 2334 at the date 12/30/2010 to check if it's exist in table and if it's exists doesnt add it
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Dec 16, 2010
I have Called a Function " GetPhotos" from Designer Page (source). Getphotos() is in Code-behind Page. It runs well When i only Build the Application. But when i Publish the same application using "fixedName and single page Assemblies" option Enable, it Returns an Error
Compiler Error Message: CS0103: The name 'GetPhotos' does not exist in the current context.
what should i do? Code in Design page:
<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
<asp:Panel ID="pn1" runat="server" GroupingText="Facility's">
<table width="100%">
<tr>
<td style="text-align: left">
<asp:Label ID="Label2" runat="server" Height="100%"
style="font-size: 21pt; font-weight: 700; color: #996633" Width="100%"></asp:Label>
</td>
</tr>
<tr><td style="text-align: left"><asp:Label ID="Label3" runat="server"
style="text-align: justify"></asp:Label></td></tr>
<tr>
<td>
<asp:GridView ID="GridView1" runat="server" AllowPaging="True"
BackColor="White" BorderColor="#336666" BorderStyle="Double" BorderWidth="3px"
CellPadding="4" PageSize="15" Width="100%"
onselectedindexchanged="GridView1_SelectedIndexChanged">
<RowStyle BackColor="White" ForeColor="#333333" />
<FooterStyle BackColor="White" ForeColor="#333333" />
<PagerStyle BackColor="#336666" ForeColor="White" HorizontalAlign="Center" />
<SelectedRowStyle BackColor="#339966" Font-Bold="True" ForeColor="White" />
<HeaderStyle BackColor="#336666" Font-Bold="True" ForeColor="White" />
</asp:GridView>
<%
GetPhotos(Label2.Text);
%>
</td>
</tr>
</table>
</asp:Panel>
</asp:Content>
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Oct 27, 2010
I have a table "assignments" with records that are assigned to multiple "users" by the "department" they belong to. Each user then can have it's own "status" for each assignment.
When the user logs-in i need to show all his assignments and the status.(but status record doesn't exist yet)
When a new assignment is created I don't want to have to create a new record relating the assignment to the user. I want the relationship to be by the department the user belongs to and the department the assignment was assigned to.
Only thing i can think of is when the user logs in to load the assignments that belong to the user's department then look thru all the records. For each record loop thru the status table. If a record exist show the the status. if it doesn't then make default value and when the users clicks to view the assignment a new status record will be added.
Only thing i don't like is looping thru the status records while looping thru all the assignments.
How else can I do it? I don't see how could join the assignments table and the status table if the status record doesn't exist yet.
tables:
[ASSIGNMENTS]
assignmentID
departmentID
assignment
[DEPARTMENT]
departmentID
department
[USERS]
userID
departmentID
user
[STATUS]
userID
assignemntID
status
BTW, I'm using Linq-to-SQL
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Feb 15, 2010
I'm trying to create a HTTP handler to handle all requests to a folder but I only want it to fire if the files requested don't exist (EG: Request comes in for file X, if X exists I'd like to serve the file, otherwise the handler should deal with it).The files will only be static content, not scripts themselves, which I assume makes it a bit easier but I can't seem to find anything that will do the trick... Anyone have any ideas? I assume it can be done since the IIS7 rewrite module can manage it, but I can't see how...Edit Just to clarify... the handler is the typical case and it is not an error-handling routine but actually delivering appropriate content. I just want the ability to add new files to the folder either as separate things or as overloads to what the handler would deliver.
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Mar 24, 2011
I was wondering if there was any way to ignore content if a contentplaceholder doesn't exist?
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Sep 2, 2010
I am inserting a record and want to set the value for a foreign key but I am getting an error - I initally thought that it would insert it if it didn't exist but I must be wrong and want to confirm that I need to check all values and make a record for them if they don't exist... here's what I am trying to do - does his make sense?
var newAllPart = new Part();
newAllPart.PartNumber = partNumber;
newAllPart.Manufacturer.ManufacturerName = partManufacturer; // error here if the Manufacturer doesn't exists already
newAllPart.PartType.PartTypeName = partType;
newAllPart.Category.CategoryName = partCategory;
newAllPart.DateCreated = DateTime.Now;
newAllPart.UserCreated = userCreated;
newAllPart.Package.PackageName = partPackage;
newAllPart.Statuse.StatusName = partStatus;
localDB.Parts.InsertOnSubmit(newAllPart);
localDB.SubmitChanges();
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Jan 10, 2011
I am trying to locally install a CMS for my website. During this installation process, it shows me an error "User or role does not exist in the database. Screenshot of the error: Here's the screenshot of the login properties from Management Studio (Properties of the user Sarin)
Screenshot shwoing the database user properties: [URL] User mapping: Screenshot: [URL]
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Aug 26, 2010
i have a Class named Helper.cs inside my App_Code folder. And i get this error:
Compilation Error
Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.
Compiler Error Message: CS0103: The name 'Helper' does not exist in the current context
Source Error:
[Code]....
And i know my compiler recognizes the Helper class because the 'Helper' is colored in cyan... means is known by the compiler. What am i doing wrong?
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Mar 9, 2010
I have an ASPX Page:
<%@ Page Language="C#" MasterPageFile="~/site.Master" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="myProject.Presentation.Web.Default" src="Default.aspx.cs" %>
<%@ MasterType VirtualPath="~/site.Master" %>
...
<asp:Repeater ID="rGrid" runat="server">
<ItemTemplate>
...
</ItemTemplate>
</asp:Repeater>
With this Master:
<%@ Master Language="C#" AutoEventWireup="true" Codebehind="site.master.cs" Inherits="myProject.Presentation.Web.master" src="~/site.Master.cs" %>
When I try to access one of the members on the page:
namespace myProject.Presentation.Web {
public partial class Default : System.Web.UI.Page
...
rGrid.DataSource = myProject.Business.User.GetReports(UserId, true);
Iget this YSOD on that line:
CS0103: The name 'rGrid' does not exist in the current context Yet Intellisense and Object Exporer say it's valid. Why is that?
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Dec 27, 2010
I have a PHP website and I am looking to convert it into ASP.NET. So I am learning ASP.NET and I needed a way to upload multiple files to the server. So I ran across this tutorial: [URL] I did everything correct, but I get this error:
Compiler Error Message: CS0103: The name 'Path' does not exist in the current context
Source Error:
[Code]....
Source File: c:UsersUser1DesktopUweaveLigues Hockey SimulesViewsAdminFormIndex.aspx
Line: 18
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Jan 24, 2011
I transferred my project into another computer from Win XP to Win 7. After installation, I realized that something in my App_code folder, called like mydata.web.utils namespace, has a class called like WebConstants (which is public class and public functions).
now in areas like global.asax, it tells me "WebConstants does not exist in this context"
Even though I have:
<%@ Import Namespace="mydata.web.utils" %>
And webconstants.cs has:
namespace mydata.web.utils
{
public class WebConstants
{
public static String APPLICATION_VERSION = "version";
........
}
}
No syntax errors or compiler errors in webconstants.cs
But everywhere else, it's saying "what is 'web'"??
If I rename the namespace from "web.utils" to just "web", still same problem. If I rename "web.utils" to "wez"--then the compiler errors go away.
But I cannot do this, because then I'd have to change it all over the project, which is a ton of work.
I also notice in the "build output" that there is no App_code being compiled in the project. Maybe because it's an ASP.net folder, I'm not certain. Is that normal?
How is it that the same source code, same visual studio, produces errors in win7 and no errors in the winXP computer?
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Jan 29, 2011
im getting this error CS0103: The name 'ProjectName does not exist in the current context, im getting this error on Global.asax. i tried to clean and rebuild but its not working, please tell me how to resolve it?
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Sep 16, 2010
I just switched from Classic Mode to Integrated Mode and now HttpContext doesn't seem to exist in my ASP.NET application. I can't even add a Watch to HttpContext nor to HttpContext.Current.
I'm using FluorineFX where in the Web.config a HttpModule is defined. Apparently, in IIS7 Integrated Mode, these HttpModules need to be added to the Modules section in System.WebServer. I have done this, but now I'm having this HttpContext problem...
Code is in a simple service class being called by Flex (amf).
if (HttpContext.Current.User.Identity != null)
{
...
Web.Config (I don't know how to display this properly in Stack...):
<?xml version="1.0" encoding="utf-8" ?>
[Code]....
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Feb 6, 2011
It sounds pretty simple, but I can't find a way to make it work. I have a FormView with a InsertTemplate where it inserts the current logged in user's UserId and content from a HTMLeditor, and a EditTemplate where it retreives the current logged in UserId and shows content from database in the HTMLeditor.
How can I get it to show EditTemplate if the userId exist in the table, and InsertTemplate if the UserId does not exist in the table?
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Aug 15, 2012
I have dropdown list in my page
BindDropDownList(DdlDistrict, "District1", "District", "ID");
DdlDistrict.Items.Insert(0, new ListItem("select district", "0"));
And I use this code for binding from database
DdlDistrict.Items.FindByText(_dr["District"].ToString()).Selected = true;
Here if in database have value it show in ddldistrict
Now I want if there wasn't any thing in database in dropdown list show "select district" that i define here
DdlDistrict.Items.Insert(0, new ListItem("select district", "0"));
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Dec 13, 2010
I am working on a contact form. i am getting an error below, here is my code:
[Code]....
And here is the error i'm getting:
Compilation Error
Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately. Compiler Error Message: CS0103: The name 'txtEmail' does not exist in the current contextSource
Error:
[Code]....
Line 20: try
Line 21: {
Line 22: MailAddress fromAddress = new MailAddress(txtEmail.Text, txtFirstName.Text + " " + txtLastName.Text);
Line 23:
Line 24: // You can specify the host name or ipaddress of your server
Source File: c:HostingSpacesartofmouldingartofmoulding.comwwwrootcontact.aspx.cs
Line: 22
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Jun 4, 2010
I'm adding now e-mail sending to my application and I have one problem. When user gave a bad e-mail address (that doesn't exist) and I'll send email to that address, that email message will go back to my email account. So for 100 users it will be 100 unwanted messages. In this situations my email account will be full of messages. So: how to avoid that situations and remove automatically incoming messages?
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Sep 3, 2010
i am gettign this error
Compiler Error Message:
CS0103: The name 'lblRegion' does not exist in the current context
Source Error:
[Code]....
Line 31: {Line 32: Line 33: lblRegion.Text = dt.Rows[0]["RegionName"].ToString();Line 34: lblCountry.Text = dt.Rows[0]["CountryName"].ToString();Line 35: lblCountryCode.Text = dt.Rows[0]["CountryCode"].ToString();
this is source code:
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Net;
using System.Xml;
public partial class CSharp : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
//Get IP Address
string ipaddress;
ipaddress = Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
if (ipaddress == "" || ipaddress == null)
ipaddress = Request.ServerVariables["REMOTE_ADDR"];
DataTable dt = GetLocation(ipaddress);
if (dt != null)
{
if (dt.Rows.Count > 0)
{
lblCity.Text = dt.Rows[0]["City"].ToString();
lblRegion.Text = dt.Rows[0]["RegionName"].ToString();
lblCountry.Text = dt.Rows[0]["CountryName"].ToString();
lblCountryCode.Text = dt.Rows[0]["CountryCode"].ToString();
}
else
{
}
}
}
private DataTable GetLocation(string ipaddress)
{
//Create a WebRequest
WebRequest rssReq = WebRequest.Create("[URL]xml/" + ipaddress);
//Create a Proxy
WebProxy px = new WebProxy("[URL]+ ipaddress, true);
//Assign the proxy to the WebRequest
rssReq.Proxy = px;
//Set the timeout in Seconds for the WebRequest
rssReq.Timeout = 2000;
try
{
//Get the WebResponse
WebResponse rep = rssReq.GetResponse();
//Read the Response in a XMLTextReader
XmlTextReader xtr = new XmlTextReader(rep.GetResponseStream());
//Create a new DataSet
DataSet ds = new DataSet();
//Read the Response into the DataSet
ds.ReadXml(xtr);
return ds.Tables[0];
}
catch
{
return null;
}
}
}
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