ADO.NET :: Handling Default Notnull Column In Linq To Sql?
Sep 16, 2010
I have a column called regdate datetime default getdate() , the column is notnull.I am using linq to sql.I have created instance of that table and when i try to insert record into the table, I am getting daterange exception.(range should be 1/1/1753 to 31/12/9999).In that object I am not setting any value to regdate property as that would be taken care by sql server.If i set regdate = datetime.now.date then record is inserted successfully.I dont want to set any value from front-ent.I want sql server to do that for me like we do it using stored procedure.
View 6 Replies
Similar Messages:
Nov 16, 2010
i'm using datalist to display product details.
every item in datalist contains...
product image, quantity, details button, and add to cart button
my requirement is whenever someone selects the quantity textbox or edits it the default button for the page should be add to cart button.
or add to cart button should be clicked itself whenver enter button is pressed from keyboard.
View 2 Replies
Jan 30, 2010
I have a requirement to convert LINQ to DataTable.
I stole the following Extension Method from StackOverflow:
[code]....
View 2 Replies
Jun 1, 2010
I have a dropdownlist that is being populated using linq. The code for linq is below
[Code]....
When the page is viewed the dropdownlist show the following;towels, shoes, etc. What I would like is the default item to be nothing. That is when the page is viewed then the drop down list should show something like this "select category". Right now it is starting by showing towels, which is quite irritating, since if I want to see towels I first have to select something else and then go back and select it!
View 6 Replies
Oct 9, 2010
how do i create linq query and asign that query to as data source to datalist on default.aspx.cs page
View 3 Replies
Apr 23, 2010
I have a Dynamic Data Website that I created after watching the video tutorials on this website (I'm new to programming, but not computers).I have a SQL Table named 'Adult' that has a 'DOB' column. I would like to add an asp:label to the Default.aspx that does a LINQ to SQL query to determine if it's someones birthday today and if so display their name and age.
View 5 Replies
Oct 19, 2010
I need to write this: INSERT INTO tableName DEFAULT VALUES in Linq SQL format, does it possible?
View 6 Replies
Oct 7, 2010
I have 5 bound columns to be retrieved from the database but I want that on page load event the retrieval of data should be sorted according to that column only
View 1 Replies
Oct 1, 2010
From my ASP.NET application I am calling an INSERT stored procedure, there is a default value for one of the columns in the table that the INSERT procedure places the data into. How do I specify that I want the default value to be used instead? (Or do I have to specify the actual default value in my parameters)
SITUATIONAL TABLE:
Column 1: int
Column 2: string
Column 3: int default -1
SITUATIONAL STORED PROCEDURE
INSERT INTO TABLE
(Column 1, Column 2, Column 3)
VALUES
(?, ?, ?)
SITUATIONAL ASP.NET CODE
create paramter (Column 1, 12)
if (x = 0)
{create parameter (Column 2, "test")}
else
{
create parameter (Column 3, 24)
create parameter (Column 2, DBNull.Value)
}
View 4 Replies
Feb 2, 2010
In my application i want to compare data of two users from database table using linq.
lets say i have ten columns in UserMaster table.
Now based on the comparision i want to display result.
Like is 10 out of 10 columns matches for those two users result will be 100,if 9 columns matches then result will be 90 and if 0 matches thn result will be 0.
i dont want to write if else for somany time.
I am new to linq.
View 4 Replies
Dec 18, 2010
I am using this C# with linq to sql:
string currentLabel = from s2f in stream2FieldTypesTable
where s2f.s2fID == item.s2fID
&& (s2f.s2fLabel != item.s2fLabel || s2f.s2fIsRequired != item.s2fIsRequired)
select s2f.s2fLabel;
I am getting a compiler error saying i can't assign type System.Linq.IQueryable<string> to string.
I tried this code:
string currentLabel = from s2f in stream2FieldTypesTable
where s2f.s2fID == item.s2fID
&& (s2f.s2fLabel != item.s2fLabel || s2f.s2fIsRequired != item.s2fIsRequired)
select s2f.s2fLabel.ToString();
And that returns the same error. I'm sure this is a simple thing. what am I missing? I just want the first s2fLabel that matches the where clause.
View 4 Replies
Aug 12, 2010
I would like to select some data from multiple tables and calculate a new column IN the query.In SQL it would look like: (select A, B, ((C * D) + (C * E)) as 'calc' from tab1 join tab2 on.join tab3 on.join tab4 on ...);I've tried this in linq, but it didn't work as I believe.
[Code]...
View 3 Replies
Jun 25, 2010
I am trying to translate this:
SELECT IDNum, Max(Convert(varchar(20), (TimeOut - TimeIn), 108))
FROM IO_Times Group by IDNum
order by Max(Convert(varchar(20), (TimeOut - TimeIn), 108)) desc";
Into LINQ in C#. The above returns a list of the maximum value of (TimeOut-TimeIn) that corresponds to each unique IDNum (There are multiple TimeOut-TimeIn values for every IDNum).Here is what I am trying now:
from IO_Time in db.IO_Times
orderby SqlMethods.DateDiffMinute(IO_Time.TimeIn, IO_Time.TimeOut) descending
group IO_Time by IO_Time.IDNum into list
select new
{
ID = list.Key,
Time = list
});
This returns the correct IDs in the correct order, but the "list" contains everything in the database entry (which makes sense). I have also tried group by IDNum and Time, but then I get unique time entries and multiple IDs returned.I could do a foreach loop and manually sort it all out, but I would really rather not do that.
View 2 Replies
Jan 14, 2011
how to get column names from linq datasource?
[Code]....
View 7 Replies
Aug 19, 2010
I got a sql table and is trying to sort the data by the column that contains the data entered in a search form.
My code is below:
[Code]....
View 2 Replies
Feb 2, 2011
I am using Linq to read data from the database, the database has 5 coloumns.Here is the code that I am using to read from the database.
[Code]....
Now, I call this method as : var retrieved_Data = objDataMgrClass.ReadData();Now comes the problem that I am facing how to read each coloumn from this var retrived_Data??? I have tried using foreach loop but i keep getting an error : foreach statement cannot operate on variables of type 'object' because 'object' does not contain a public definition for 'GetEnumerator'.The foreach loop i have used as:
[Code]....
View 4 Replies
Nov 17, 2010
All I am trying to do is query the database, then get the returned values, so that I can do some calculations. But, I don't understand how to get the values from the database row that is returned, so that I can assign it for usage.
I would like to do something where the logic goes: for the index of [1] (which is just column 1), multiply it by 2. For the index of [2] (which is just column 2), multiply it by 3.
Example below:
This does NOT work:
[Code]....
View 6 Replies
May 19, 2010
I was wondering if there is easy solution to this or I'm stuck with following:When updating DB:
dti.Pass = Crypter.Encrypt(dti.Pass);
_db.SubmitChanges();
When selecting from DB:
Data.DbTableItem dti = _db.Single(a=>a.Id == id);
dti.Pass = Crypter.Decrypt(dti.Pass);
Meaning - I am not really into writing repetitive code and this seems like logical thing to be supported by LINQ; so I'm wondering if it is.
View 3 Replies
Jul 9, 2010
I added a DateTime column to a table in my database through the Server Explorer. Because the team lead for this project wasn't savvy on nullable types, one of the requirements was that there be no null values in the database. This requires me to program all sorts of useless code into the system, but that's another story. My problem arises when assigning a default value to this column. I typed the following into the cell for the "Default Value or Binding":
1/1/1753 12:00:00 AM
When I went to inspect the content of the table, I found that all of the dates had been populated with:
1/1/1900 12:00:00 AM
View 2 Replies
Jan 31, 2011
I have a gridview which I use to add items through the footer and the EmptyDataTemplate. There is a date field. I want to set the default of it to the current system date.
gridview template code is as follows...
[Code]....
Empty data template code is as follows...
[Code]....
View 4 Replies
Aug 26, 2010
I'm using Linq to Sql to call some stored procedures for more complex work; is there any way Linq to Sql can tell me when the output columns from the stored procedure do not match the properties of my entity object? It seems that Linq to Sql tries its best to match the columns and ignores any mismatches.
View 8 Replies
Jul 28, 2010
is there a way to update a column for all rows in a collection using linq like sql does it
eg. UPDATE myTable SET myColumn='newValue'
Also weighing options as to whether there is better performance using linq to sql for this or straight sql to DB via table adapters etc.
View 2 Replies
Oct 21, 2010
I have a Timestamp column in my Table. I want to read the date time value and display in UI.
In Linq the Timestamp column is represented as System.Data.Linq.Binary.
I dont know how to retirve date time value in "MM-dd-YYYY" format from this Linq.Binary
- Why I am using Timestamp?.
I want to perform some operations based on the last modified date time of the particular row. Since I am using TimeStamp column in my Table as version column, It will contain the last modified date details, So i want to read the date time value from this time stamp column to do some other operations.
View 5 Replies
Mar 8, 2011
I have a complicated join between a few tables but I have managed to replicate the error using linqpad and the small tables below. There are references between the COLNAME column and the YAXIS column and also between COLNAME and XAXIS that is not explicitly defined.
The error is "Specified cast is not valid", which originally I wasted time thinking the problem was converting the data returned to my object in VS 2010, but the error also happens in linqpad with no defined object. It seems insane that a bit column would cause this problem. If I change the column type to a VARCHAR it works fine. If I run the generated SQL from linqpad or sql profiler that also returns fine.
[Code]....
View 1 Replies
Feb 9, 2010
Mmy data table has four columns. How can I get only selected columns name?
View 5 Replies
