I have just started using LINQ with VS2008. I have added extra columns to my table, saved the changes, but class ClassName.Designer.CS didn't get updated. What do I have to do to updated the class? Do I have to do it manually, or is there a way to automatically synchronize tables and ClassName.Designer.CS?
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I wanted to know if it is possible to dynamically add columns to a table in the Database?I know how to create a table dynamically in the DB the code for it is given below, howver I do not know, how do I add columns to it dynamically.
Dim NewTable As String = "CREATE TABLE Dynamic " +
" (" +
" job_id smallint" +
" IDENTITY(1,1)" +[CODE].....
I have a table added to a dbml file in my website. The website is already deployed to Live server. Now I have been instructed to a add a new field to the table. The field will be defaulted as getdate().
I don't plan to modify my dbml file for this change since the filed holds a default value. Will it cause any issue(performance related or any other). I am sure that I will not have to use the newly added field in the website. I am new to LINQ.
If I have a linq statement like:
[Code]....
There may be a lot of data in the Blogs table. What if all I wanted was say BlogID, BlogTitle and BlogAuthor and nothing else, is there a way to do this in an effort to make the sql more efficent?
Along the same lines in my DataContext (.dbml) file I added some associations between some of my tables. This makes coding nice when I do a linq statement that will join those tables automatically for me but my concern is does it do that everytime, thus making all my linq quieries inefficient?
Dim AlterTable As String = "alter table [Upload] add [Country] nvarchar (50) default 0 NOT NULL,[Address] int default 0 NOT NULL"
Dim connection As Data.SqlClient.SqlConnection
connection = New Data.SqlClient.SqlConnection()
connection.ConnectionString = ConfigurationManager.ConnectionStrings("ASPNETDBconnectionString1").ConnectionString
Dim cmdUpdating1 As New Data.SqlClient.SqlCommand(AlterTable, connection)
cmdUpdating1.CommandType = CommandType.Text
connection.Open()
cmdUpdating1.ExecuteNonQuery()
connection.Close()
This is the code which I am using for altering the number of columns in a table in the DB. so with this code i am able to add new coulmns dynamically. Now my major requirement in this is to obtain the headercount from the user( say "telephone number" and "language") and based on it generate the columns dynamically in the table in the DB.
how to write that below query in linq
DECLARE @Name varchar(20)
Select @Name = empFirstname+','+empLastName+','+empBankCode From srpEmployee
PRINT @Name
I am a newbie to objectdatasource... I have a code i am tweeking that is entirely using objectdatasource.... The minor changes as taken me a week and still counting to figure out... Here it goes
I am adding a new column into my table(sqlserver)... I went into my dataset in and added the same column which is a foreign key of another table added to the dataset.... Now when i save it and complile... my BLL File breaks and i am not able to get into my business logic. Again this is a bll code i did not write.....
My question is.... how is a bll file generated..? The problem is obviously coming from my dll file..
how can i select a record from A table and insert into B table using linq?
View 2 RepliesI'm trying to add these 4 co,umns to the table as bit type woth a defaut of FALSE. What am I doing wrong here? I get a syntax error near (
create PROCEDURE [dbo].[AddADIFields]
AS
ALTER TABLE dbo.tblTESTS ADD (AI1 Bit 0,AI2 Bit 0,AI3 Bit 0,AI4 Bit 0)
I have created a table in my SQL database that has a primary column (Title) and another column named Callsign. How can I access the table row that has a certain title and Callsign using C# in a web page event handler?
View 7 RepliesI am new to LINQ but not >net. I do understand SQLDataSource, etc. I was just told by a coworker not to use a LINQ to SQL Class for my new project (Bank.dbml). I was told to use instead the ADO.Net Entity Data Model (bank.edmx).
BankModel.edmxBank.dbml
When only using ADO.Net Entity Data Model I try to associate a GridView with a new LinqDataSource I get no options. When I add a LINQ to SQL Class I get the option to use it but it is empty. Is this because all my LINQ classes are mapped in the ADO.Net Entity Data Model (bank.edmx)? Can someone tell me (or point me to) what the differences are in these two?
Is it possible to add attributes in a linq query along with the other object data?
Here's what I have
[Code]....
But I'd like to add a custom attribute to each RadComboBoxItemData object in the query instead of having to do a foreach loop after the linq query to add the attributes on..
Is it possible in to set up an SQL table column to have multiple values? Or would I have to put my values into a new table and link it to the original one?
View 6 RepliesI am returning an IList to my model of data about users. I want my end users to be able to select which columns they want to see.
I know I can do this with a huge "if statement" however, I know there must be a better way. I have created an Enum with the column names. I feel if I could take the IListItem.EnumName I would be set. However, I'm not too sure on how to do this.
I have the default membership table that was added automatically, then just used server explorer to add more columns, like FirstName, LastName, etc. In my code I can access all the default columns, but not the ones I created. Any thing special I need to do?
Here is how I access the table. using user. gives me all columns, but the one I created.
string userName = User.Identity.Name;
MembershipUser user = (MembershipUser)System.Web.Security.Membership.GetUser(userName).ProviderUserKey;
I am trying to replace all null value with space for all columns in a table.
(note: just we have to pass parameter table name "XYZ" result will come aotumaticly, we dont need to bother about column name)
i have done it through C# application. but love to do it through Sqlserver only like using storeprocedure, function.
my C# code is like that
[code]....
I am running the folowing simple test code:
[Code]....
But the UpdateUser field does not update - it remains at NULL. No errors occur. I can use similar code to update table fields in other dbmls successfully.
i am choosing a category from a DropDownList controll, and if want to add a new category at the same time i have a TextBoks for it, i have create a Model, BLL and DAL classes, my problem is:
in the DAL class i want to add a new row to Question, but i need to check first if the object.category exsist in the table Category, if it does i want to get the Cid for it if it dosen't exist i want to create a new raw then get the Cid, this is my code:
public string add(Faq inFaq)
{
using (var db = new DBClassDataContext())
{
try
{
var se = from Category in db.Categorys
where Category.category == inFaq.category
select Category.Cid;
if (se.Count() == 0 ).........
I've requirement where user can enter multiple columns like first name, lastname, email, age, sex fields and insert them into database.on my frontend aspx page, i'll be showing a single row initially with 5 text boxes(first name, lastname, email, age, sex) and a button to add more columns. when user clicks on add more, another 5 textboxes will be shown and then i'll be taking 5 + 5 (textbox values) and comma seperate them and need to insert into a table with primary auto increment key ID and the remaining 5 columns(firstname, lastname, email, age, sex). I previously worked on the same requirmeent but with only single column. Now i need to insert for 5 columns, How can i do this? Below is my stored proc which i used for single column insertion.
[Code]....
I want to add a field in a Existing table.
I dont want to alter the whole table.
Give me Solution at the Design side.
I guess the code is totally right and doesn't require any change in it,, however am getting an error which says "Conversion failed when converting the varchar value '11/11/2010' to data type int."check the attached file ..
[Code]....
i am new to this linq concept,
i have used the following code to delete multiple records in my table,
but when i hit the button insteading deleting multiple records only one record is getting deleted
below is the code
protected void Button1_Click(object sender, EventArgs e)
Is there a way to do the following in VB:dim sTableClass as string = <my underlying table class in linq>dim dbTab as system.data.linq.table(<typed class of sTableClass>)I've tried cycling through the table objects of the linq data context and retrieved the following: Dim ddData = pkDB.GetTable(tt.RowType.Type.UnderlyingSystemType)(where tt reflects the row of the table I want to retrieve) But the expression returns and itable and I need the table equivalent but can't get this to work with a stri
View 1 RepliesMmy data table has four columns. How can I get only selected columns name?
View 5 RepliesI have been google some but I canīt find any solution that have been worked for me. I do use System.Net.mail on my site to send emails to individual employes. Now I would like to be able to email all emplyees. The emplyees email address is stored in a MS SQL table. Is it possible to make a BCC email to all employees in that table?
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