i have designed a database into the vs 2008 mobile database. my batabase has three column column1(int),column2(int),column3(int) and i want to set the value of val(column3)=val(column1)+val(column2); how and where to set the computed column value.
View 2 RepliesI have a column that contain date (of type datetime), i also want to add another column that will contain 1 Or 0 depends if the value of date has passed the current date or not.
View 4 RepliesAfter looking for a driver to open legacy dbf drivers to connect, the next level trouble a have is this one: first, i can retrieve the data but when trying to filter by a parameter (somesc columns) i get an error. The error says about the database can't determine. The error is a columm tha is formated ( 1234 ) about 8 space, fixed. The values in the query appears like that. I resolve this by Trimming Ltrim(ColumnName) and i get this (1234). Now in SqlExpress, how can i filter by the new Trimmed Expression? (This is a primary key that the DBF use)
Sample:
SELECT column1, column2, column3
TABLE FoxProDB
Now
SELECT Ltrim(column1) as NewExp, column2, column3
TABLE FoxProDB
Where NewExpre = @NewExpres -Error-
Using vs2008 I have a SQL Server database attached to my web app. I want to use a computed time column in the database, along the lines of :
timenow is 1 column
hoursleft is another column
timeend would be another column.
I want timeend to = timenow + hoursleft. Is it possible to do that, and if so what would the formula be that I would enter into the computed column field, and, what datatype would the columns be, timenow and timeend I would expect to be time(7) and hoursleft an int. But is that correct?
I have the following GridView:
<asp:GridView ID="gv" AutoGenerateColumns="false" runat="server">
<Columns>
<asp:BoundField DataField="productName" HeaderText="Item" />
<asp:BoundField DataField="unitCost" HeaderText="Cost" DataFormatString="{0:c}" />
<asp:BoundField DataField="originalCount" ItemStyle-HorizontalAlign="Center" HeaderText="Old Count" />
<asp:TemplateField HeaderText="New Count" ItemStyle-HorizontalAlign="Center" >
<ItemTemplate>
<asp:TextBox ID="NewCount" Width="20" runat="server" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
And I want to add a final 'Total' column that calculates (originalCount - NewCount) * unitCost and updates it as the user enters a number in the NewCount text box. Can I do this just with .net, or do I need to use Java? If the latter, how do I tell which Gridview cell to update?
I have a table of people with columns holding bits of info about them. I also need a variety of computed columns such as FileAs (lastname + ", " + firstname) and CityStateZip (you get the idea). I am wondering where best to put these definitions. It's worthwhile to note that the user will want to search for things as seen on the page, not the little atoms in the table. For example, searching on ", e" finds everyone whose first name begins with E. Typing ", az" to get everyone who lives in Arizona.
I noticed that linq-to-sql queries only recognize the fields in the table definitions, not any that are added in the partial class associated with the dbml. Linq-to-sql does work against computed columns in the database; however, the column definitions--especially for international address formats--will become very complex and much better handled in code.
I want to create a computed column in SQL SERVER and set the formula to this
([Category] + '.aspx?ID=' + [Post_ID])
Not working though......what am i missing? Category and Post_ID are current columns in the table
I have a datatable in MS SQL that has FirstName and LastName. In MS SQL I created a computed field called FullName that was ((rtrim([LastName])+', ')+rtrim([FirstName])) I created a DataSet and a Business Logic Layer. In my typed DataSet I saw FullName in the listing when I created it. I am able to use FullName in my webpage. I use it to populate a dropdownlist. However, now when I make changes to the Customer Table I am getting this error message (seen below)
Question: Should I have created the field FullName in my MS SQL Table or should I have left it alone and somehow just added a column to the DataSet and placed an expression in the FullName column? The column "FullName" cannot be modified because it is either a computed column or is the result of a UNION operator. 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.Data.SqlClient.SqlException: The column "FullName" cannot be modified because it is either a computed column or is the result of a UNION operator. Source Error:
[Code]....
Source File: c:Users ottfarmsAppDataLocalTempTemporary ASP.NET Filesinternalauburnriverside98ea0e1f2a7f0720App_Code.lbdcba1v.2.cs Line: 1240 Stack Trace:
[Code]....
I have stumbled into a problem in which Im having a hard time solving. I have a linq data setup(based on a mssql) where a Purchase Order contains a number Equipments - each equipment has a price. I have a gridview that shows the summed price of the equipments that are included in a Purchase Order. This sum is currently being calculated on RowDataBound through a "listOfEq.Sum(Eq => Eq.PurchaseOrderPrice);" expression which works without any problems. My problem is that I want to be able to sort the gridview based on this summed value, which I cannot do with a normal sortexpression. My next thought was to create a function in my database to calculate the sum instead and then use this is my data basis for the summed column. I have created a function like this:
[Code]....
I want to create a sortable column based on this data. My thought is something like this:
[Code]....
Displaying the correct information is not a problem, however creating the sorting is. Im not sure what to put in the SortExpression. Anybody got an idea of what to do? Perhaps I am forced to use a computed column for this however I dont know to create this column when its based on another table. If this is the case, any idea about how to do create a computed column thats based on data from another table?
I'm trying to define a computed column that will contain an auto-incremented number. In other words, I want it to work exactly like identity, but since I can have only one identity column per table, I wanted to make a computed column that reads its latest value and increment it by 1.
View 5 RepliesHow do add read-only computed column in LinqToSql designer (dbml)? My existing table structure:
Name: ID, Type: int, AutoGenerate: true, AutoSync: OnInsert, PrimaryKey:
true, ServerDataType: int not null identity, Source: IDName: Name, Type: string, ServerDataType: nvarchar(100) not null, Source:
NameName: Value, Type: byte[], ServerDataType: VarBinary(max), Source:
Value, UpdateCheck: Never
I want add the 4th colum name: Name: HasValue, Type: bool --> [Value] != null
How do i generate another computed column that will contail the result of GrandTotal/Total,
where GrandTotal is another value comes from computed column and the Total would be the sum of the Total within SchedularID.
And thats what i have done so far: [Code]....
I am building next version of our Asp.net web application. for this new build one column is added in database. Now I have to make this new build backward compatible. Means build should be good for old database design (without that added column) and new design. Just wondering if there is an efficient way to know whether or not particular column exists in table you are working with?
at this time, I am getting all the columns in datatable and loop through it to make sure that new column is available in it? if yes the modified query with this column and if not then old query. Just cuious, what is the best industry practise to make any build backward compatible with old database design?
I want to retrieve the name and phone columns from all the tables in my database not in systables.
Ok this works but i dont want to get it from just the test table I want to get it from all the tables that I create
"USE mrpoteat SELECT name, phone FROM mrpoteat.dbo.test where name = name and phone = phone"
I am needing to search the primary key column in my database and when I set the where statement in the datasource as Where
="it.TRANSACTION_ID
LIKE '%' + @SearchID + '%'"
It tells me LIKE must be of string type. What can I do?
I was recently told by a colleague that VS 2010 has inbuilt features similar to Resharper (e.g. Ctrl T to find a class etc...). I have been experimenting with VS 2010 Ultimate edition but cannot seem to find these features.If the features exist could somebody point me in the right direction?
View 1 RepliesI am working on the migration of the server. Our new server is Windows server 2008 with IIS7.0 I have a great difficulty in browsing the pages hosted in virtual directories. I have followed the proper steps of creating a virtual directories and converting them into applications. But when i try to browsing the pages of the virtual directory, i get the 404 error. Note: The .Net Framework 4.0 is installed on the server and the web applications which i am trying to configure in the virtual directories are developed in Visual Studio 3.0. Even the http://localhost also don't work.
View 9 RepliesIn the tutorial I am doing I have been requested to change a field in the colums properties of a table. The ID column is currentl displaying NO and NO again for "is aIdentity. I can Highlight the values but cannot change to yes. either in the properties talbe or in the properties window on the right hand side of IDE interface. How do I change that value?
View 3 Repliesactually recently we just shifted our website. & now when i try to transfer database from my previous server to new remote server database.all the tables auto increment field is set to 'NO' and there is no primary key anymore.
View 3 RepliesI am using c# with asp.net and SQL Server 2005 as backend. I want to use dropdown list control in a form to populate a textbox. The dropdown control is linked to a column in the database. How can I code this in c#?
View 1 RepliesI am using Vs2008 in that i created one new project of Windows form using C# language. but the thing is i want to connect the database connection to that one, but there is no webconfig file. how to connect the database connection.
View 1 RepliesFailed to generate a user instance of SQL Server due to failure in retrieving the user's local application data path. make sure the user has a local user profile on the computer. The connection will be closed.
View 1 RepliesI would like to know if someone can please help me with the followingI would like to create a bulk entering textbox...every sentence seperated by a line break should go in to the Database as a new column.....Im gonna use SqlDatasource for the inserting..How can I get all the sentences to break up at the linebreak and then get inserted in a separate database column?
View 3 RepliesI have a database on Go Daddy and my VS2008 app can not access it via web.config connection string. Of course runs great locally in development. I copy/pasted the connection string information from Go Daddy exactly into my web.config file. Web site runs fine on the web but when I try to Login at my login page, i get :The SSE Provider did not find the database file specified in the connection string. At the configured trust level (below High trust level), the SSE provider can not automatically create the database file.
I used VS2008 to create the .sql script files and uploaded them to Go Daddy and the Go Daddy people say everything works as they and I can both Login to the database from within GoDaddy.The database i am trying to access consists of the a ASPNETDB.mdf and another Database.mdf together as one in the Go Daddy database.
here is what i used: <connectionStrings><add
name="superskin"
connectionString="Data
[code]...
Ive created a web site using VS2008 ASP.net and connected to a Firebird Database.
I have a page that has a GridView(added at design time) and have connected to a table at runtime.
[Code]....
All good as the table contents are displayed at 10 rows per page. Ive set the Property AllowSorting to True. Has anyone got examples on how to code the sorting? Ive had a look round the net but all the examples Ive tried dont work.