How to make the linq throw error, when not null columns are there in the table.
Why I am saying, it is. I tried to add to column in the table. Linq throwed error os some sort. I could not understand. it was like some innner table etc.
I had to resort to native sql, which showed the error, as the not null fields are there in the table.
When i run code error throw ,my model is null. When i try to debug controller method my debuger dont goto controller code, Why that?
View 3 RepliesI have a linq to sql entity class in which I declared some DateTime fileds like this:
[Code]....
And this is how I fetch data form repository:
[Code]....
All non DateTime fields are filled properly but all datetimes are null.[Column(DbType = "smalldatetime")]
Is there an easy way to reset all the fields in a form. I have around 100 controls in my asp.net form and there is submit and reset buttons.
How do I make all values in the fields null when user hits reset button?
i want to use a function to get all the fields from a LINQ table as ill be using this table alot i thought putting it in a function would be quicker
how can i get all the fields and all the field data from linq table and use it in a function
for example
var address1 = FunctionName.Address1
var postcode = functioname.postcode
or however i can make this work
[Code]....
I have a webservice project and a web project in the same solution.
The web project implements a membershipprovider.
I want to be able to authenticate user via the webservice project but when i call this method in the webproject:
public static bool AuthUser(string userName, string password)
{
return Membership.ValidateUser(userName, password);
}
I get this inner ex."Failed to generate a user instance of SQL Server due to a failure in starting the process for the user instance. The connection will be closed." Calling the method from the webproject works fine. I understand why I get the ex. but not how to solve it.. UPDATE Well I fixed the issue by deleting the C:UsersJRBAppDataLocalMicrosoftMicrosoft SQL Server DataSQLEXPRESS folder.. However now the method always returns false.. It almost seems like it doesn't use the proper connectionstring.
I developed a web site more then a year ago with .net2.0/c#/mssql 2005. it works fine but i was asked to replace mssql with mysql.
I wrote a class to complete data access works (unfortunately, I didnt use nhibernate or other data access tools :((
I edited the class to use System.Data.Odbc objects rather than System.Data.SqlClient.
It works fine in selecting data but not manipulating data. when i try to insert new data it adds null data for all fields in the table.
in debug mode, i noticed that it might be caused by OdbcParameter but not sure.
I'm using the old 404-rewrite method on a certain site that is tied to IIS6 *. So if I enter [URL] it calls my error page like so [URL]
Except if I call the page with a fragment, like [URL] I get the same result as above. I can't find the fragment anywhere:
Request.Url
Request.Url.OriginalString
Request.UrlReferrer
Request.RawUrl
headers, server variables, etc
This has come up because I want to resolve paths created by AJAX to their server-side versions. Is there any way for me to retrieve the original path from my handler?
I have two tables as below.
I tried to establish a relation between two tables in such a way that Table_Contracts will still accept NULL values for [PO_No], but [PO_No] on TableContract will be automatically updated when [PO_No] on Table2_PONo changed. Moreover, if you want to delete a record on Table2_PONo, it needs to be stopped if there is a related data in Table_Contracts.
I set a relation with these parameters:
Check existing data on creation or re-enabling>
No
Enforce for replication>
No
Enforce foreign key constraint>
No
Delete Rule>
No Action
Update Rule>
Cascade
I got this error
Introducing FOREIGN KEY constraint 'FK_Table_Contracts_Table2_PONo' on table 'Table_Contracts' may cause cycles or multiple cascade paths. Specify ON DELETE NO ACTION or ON UPDATE NO ACTION, or modify other FOREIGN KEY constraints.
Table2_PONo
[PO_No]
(primary key)
[Project_ID]
[SupplierID]
[Description]
[TotalPrice]
[PO_Currency]
[VATpercent]
[CostCode]
[Notes]
[PO_Date]
[Reality]
[UpdatedBy]
[FromAccess]
Table_Contracts
[ContractID]
[ProjectID]
[PO_No]
(accepts null values)
[ContractNo]
[ContractDate]
[ContractValue_woVAT]
[ContractCurrency]
[SupplierID]
[ContractDescription]
[ContractType]
[LinkToTemplatefile_DOC]
[SentToSupplier]
[SignBySupplier]
[SignByMercury]
[CollectionBySupplier]
[LinkToPDFcopy]
[ArchivedByMercury]
[UpdatedBy]
[Retention]
[Note]
Following problem occurred:
sending mail error
code for sending mail:
private void SendMail (string from, string to, string subj, string body, string dom)
{
System.Net.Mail.MailMessage mm = new System.Net.Mail.MailMessage ();
mm.From = new System.Net.Mail.MailAddress (from);
mm.To.Add (new System.Net.Mail.MailAddress (to));
mm.Subject = subj;
mm.IsBodyHtml = true;
mm.Body = body;
System.Net.Mail.SmtpClient client = new System.Net.Mail.SmtpClient (dom);
client.Send (mm);
}
error (exeption):
The server has violated protocol Server Response: <some code> // was translated from russian
if I test on my computer, everything works perfectly When I throw code to the server,programm throws an exeption
I have the following code, i add code for required validator, but when you make selection from dropdown to create the table, the page generates an error. Should the logic be somewhere else to add it to the table? i mean, dont they have to be there so when you submit the form, it fires the validation?
[Code]...
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)............................
I have 2 table Table A, Table B.
Table A - Parent Table
ID - Uniqueidentifier not null(PK)
Table B -Child Table
ID - uniqueidentifier null(FK, TableA)
I have a stored procedure to insert data into Table B, but when I tried to insert a null value into column ID of table B, this error came up:
The INSERT statement conflicted with the FOREIGN KEY constraint "FK_tableB_tableA". The conflict occurred in database "database name", table "table A", column 'ID'.
The statement has been terminated.
The insert statement in asp.net is like so:
sqlcommand.parameter.add(New Sqlparameter("ID", Nothing))
I am guessing adding nothing to the null value column is the problem, but i don't know how to fix it... The INSERT statement conflicted with the FOREIGN KEY constraint "FK_tableB_tableA". The conflict occurred in database "database name", table "table A", column 'ID'.
If I am going to use the asp.net membership and roles, the asp.net database includes an aspnet_Users table that has the userid and email address. If I have custom fields is it best practice to maintain a separate usert table and link on user id or to add fields to the aspnet_Users table?
View 1 RepliesWhy can't I throw a custom exception from within an Exception? In code below, I get error msg "UnableToOpenDatabaseException was unhandled" even though I have catch statement for it. What am I doing wrong? and how to fix it?
[Code]....
I'm semi-new to writing ASP.Net applications using master pages and I've run into an issue I've spent some time on but can't seem to solve.
My situation is that I have a master page with a structure that looks like this:
<head runat="server">
<title>Test Site</title>
[code]...
When I run this page and click on the image I get an "Object Expected" error.However, if I place the test function into my Default.js external file it will function perfectly.
I recently updated my VS2010 website project from .NET 3.5 to 4.0. Everything was working fine in the website project. Today I decided to migrate the website to a web application project as I have learned this is the best way to work in .NET. I split out all my class files into a separate class library and copied all my other content into my new project. Then I updated all the references and web.config.
When I build the class library, everything works great. The problem is happening when I try to build/debug the web application project. It is acting like all the controls are missing and it is also throwing a bunch of compile errors about the public properties I have in my master pages.
Control errors: "The name 'INSERT CONTROL NAME HERE' does not exist in the current context"
Master page errors:'System.Web.UI.MasterPage' does not contain a definition....
It is giving these errors for every single control and master page property in my entire solution.I notice when I add a new web.form to this project, it also adds a filename.aspx.designer.cs file in addition to the .aspx and .aspx.cs file. My existing files do not have these extra files since they were created in a different .NET version.
UPDATE: It seems I was missing the step where I need to right click on the new application folder and select "Convert to web application". I just did that and it seems to be a little bit better...
Now it is choking on Literals that are inside single quotes:
<div class='<asp:Literal ID="CssClassLiteral" runat="server"></asp:Literal>'>
It doesn't see this literal when it does the conversion... Is the above valid code or should I implement that functionality another way?
So i'm working on the form that i started MVC with - the problem is that i'm NOT using a ViewModel for the view, its an actual Linq to SQL object. And so far it works fine. This form is a beast and id rather not refactor it to use viewmodels....
My big problem now is that depending some condition, i pretty much set almost everything to disabled when a particular dropdown is selcted (to mimic a deactivated state) - when the user hits submit, the model fields are now null, even tho you can see them filled in (just greyed out and unselectable) and validation refuses them.
Is there anyway around this other than to refactor the Views to use ViewModels (and set different validation rules so submit works)?
How do I check if my value is empty AND Isnull? I need to check for both, using ISNULL is not enough because the data can change just so that it is empty.
how I can change my query to accommodate this?
[Code]....
I tried using this and am concatenating the fields together. It does not appear to be working. Here's what I have.
View 7 RepliesHave created a Webform based on a master page.The code executes OK and sends data to the database, but inserts null values for all entries except the GetDate.
If I use exactly the same code in a new webform which isn't based on the master page, it inserts everything correctly.Here is a snippet from the form which uses the master page: -
<%@ Page Title="" Language="C#" MasterPageFile="~/SpeedDateMasterPage.master" %>
<script runat="server">
private void AddToDatabase(object source, EventArgs e) [code].....
I'm using MVC 2 with some Models from a LinqToSql project that I built. I see that when I post back to a Controller Action after editing a form that has a DateTime field from the Model, the MVC Html.ValidationMessageFor() helper will nicely display an error beside the Date text box. This seems to happen automatically when the you test ModelState.IsValid() in the Controller Action, as if the MVC model binding automatically knows that the DateTime field cannot be empty.
My question is... I have some other string fields in these LinqToSql generated classes that are Not-Nullable (marked as Not Nullable in Sql Server which passes thourgh to the LinqToSql generated classes), so why doesn't Mr. MVC pick up on those as well and display a "Required" message in the ValidationMessageFor() placeholders I have added for those fields?
Sure, I have successfully added the MetadataType(typeof<t>) buddy classes to cover these Non-nullable string fields, but it sure does seem redundant to add all this metadata in buddy classes when the LinqToSql generated classes already contain enough info that MVC could sniff out. It MVC validation works with DateTime automatically, why not these Not-nullable fields too?
I am using the DetailsView Control to read a LastUpdatedDate field (which can be null until an update is performed) from the database. The LastUpdatedDate is of type DateTime saved in UTC. With the DetailsView control, I can use the NullDisplayText property of the boundfield to safely display an custom message. However, once converted to a template field, that property is lost. Now, how would I display that message if the field is null as I am also formatting the date for display to show in local time.
[Code]....
I have a Gridview showing the data on one of my tables, and when I try to edit the data in one of the columns after I click update, rather than updating the record with the new value I typed in, the rows become null as in, everything in the row I just edited disappears. This inmediatly makes my application crash because one of the fields in my table (IssueDescription) doesn't allows null values.
This is the code, which is actually 100% auto-generated from when I created the GridView control and specified in the options to implement update, delete, edit options.
<asp:GridView ID="GridView1" runat="server" AllowPaging="True"
AutoGenerateColumns="False" DataKeyNames="ticketNum"
DataSourceID="SqlDataSource1" [code].....
What is making the rows turn into null after the update? I did some research and tried to define the Update behaviour myself using RowUpdating function. After hours of learning how to use it I got it to "work", but because the Update turns everything to null when it updates, the sqlconnection command I use to do the query sends null anyways. I can paste the C# code if you'd like to see it, though I'd rather not use it if the auto-generated by asp above can be fixed instead.
My project includes a grid view which displays information of inventory items (Assets), data is quried from AssetTable. The GridView has a command field to allow editing, below is a description of the tables and how data is displayed
Tables
BuildingTable: (BuildingID, BuildingName)
AssetTable: (BuildingID,..,....,....)
ItemTemplate: Using a LINQ query I join the two table and displays in a label control a string which includes BuildingID and BuildingName (5 North Building)
[Code]....
