When stepping through my LINQ query it returns dataq,but when I try to return it as Json Result,I get the error 'The query results cannot be enumerated more than once'.
Here is my LINQ and stored proc,
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I am trying to figure out why this service does not return any data. The service does not error out is just doesn't return any data. When I take the Linq into LinqPad the query returns exactly as I expect. So I am wondering if the problem is getting my return data into a List<string>??
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I don't know what else to say to help. When I set a break point on the "return LoanStats" line a quick watch shows an empty results view.
I'm looking to translate an SQL query into linq
INNER JOIN Usrs ON
SAQ.UserId =
Usrs.UserId AND Scan.UserId =
Users.UserId
I'm not sure how to include the "AND" in the LINQ statement.
How can I SELECT second if first SELECT returns nothing?
View 8 RepliesI have inherited this code and fixed much of it. I am new to this but have read just about the entire internet. I have a Gridview which generates templatefields for 5 questions per page with 11 radiobuttons.there is a datakeyname = QuestionId from the db. If i switch autogeneratecolumns to true then i can see that the row has the correct question number in the QuestionId column. I am trying to pass both the questionID from a row and the selected radiobutton to the page behind so that i can write it to the db.the front page looks like this (please note that one of the hacks we tried was to use the tooltip as the questionid which worked but I need to use the tooltip for something else.) Also just to add, we had to fix some variables which were static instead of session. When we did this the java code that used to pick up the radio button changes stopped working. So we have tossed that bit and just want to have:Click event fired on radio button Find row in GridView Find QuestionID colunm and selected radio button for the row. Pass to code behind.
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I want to use "if statement" in Linq query. How can I do this situation?
For example:
if txtAge.Text=="", I will not use that in Linq Query.
else txtAge.Text!="", I will use that in Linq Query.
I have a class library which has my LINQ doc in it. I added a stored procedure and I get the following in my .dbml.layout :
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I include a reference to the dll of the class library to my web project and I get an error about value being returned as int where I am trying to put contents into a datalist or similar.
Code in class that calls this SP :
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So I switched code to the following in my dbml.layout document :
[Function(Name="dbo.sp_newsSearch")]public IEnumerable<news_search_result> sp_newsSearch([Parameter(DbType="VarChar(200)")] string searchVal){IExecuteResult result = this.ExecuteMethodCall(this, ((MethodInfo)(MethodInfo.GetCurrentMethod())), searchVal);return ((IEnumerable<news_search_result>)(result.ReturnValue));}
And included the following in an external file news_search_result.cs
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But now I just get nothing returned. Is this wrong way of calling a SP via LINQ? or have I just put the wrong return type on my LINQ class?
I've build a linq query.But i want a random selection so its not always ID : 1,2,3,4,5,6 How can i randomize this var? I like to bind it to a repeater.//TagCloud:
Random rand = new Random();
var tc1 = from i in JumpTide.cms.menu.GetMenuItems(32)
select new
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select Groupid,GroupName,onorusername from palgroup where groupid in (select distinct Groupid
View 5 RepliesI have a linq to sql entity class in which I declared some DateTime fileds like this:
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And this is how I fetch data form repository:
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All non DateTime fields are filled properly but all datetimes are null.[Column(DbType = "smalldatetime")]
I've created a script that adds user data to a database, however, I'd like to check the email entered is unique within the database.
I've already started the query at comm2 but not sure how to progress the script so it tells the user if the email address is already taken.
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How come my query returns 0 records?
SELECT WebSiteID, BanDate
FROM tblWebSite
WHERE (BanDate <> NULL)
The BanDate is a date column. There are date times through the table in this column. I just want the ones with a date and ignore the rest.
I am facing a big problem with simple linq query.. I am using EF 4.0..
I am trying to take all the records from a table using a linq query:
var result = context.tablename.select(x=>x);
This results in less rows than the normal sql query which is select * from tablename;
This table has more than 5 tables as child objects (foreign key relations: one to one and one to many etc)..
This result variable after executing that linq statement returns records with all child object values without doing a include statement.. I don't know is it a default behavior of EF 4.0 . I tried this statement in linqpad also..but there is no use... But interesting thing is if I do a join on the same table with another one table is working same is sql inner join and count is same..but I don't know why is it acting differently with that table only.. Is it doing inner joins with all child tables before returning the all records of that parent table?
I am writing a linq query to select a blogpost,
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The blogpost i am testing got 3 tags attached to it. The table structure is:
(table)BlogPost -> (table)BlogPostTags <- (table)Tags
So the BlogPostTags table only contains 2 fields, BlogPostID and TagID.
When i run the query above i get 3 results back. Same blogpost 3 times but with 1 tag in each. It should return 1 post with 3 tags. The problem lies in the Tags query above.
i have a function which returns a value from a query string parameter, i use it in more than 10 places in the webapp thus i have to rewrite the code every time, again and again.so to make it short, is there any way i can embed the code somewhere and keep referring to it through out my app?
View 10 RepliesI'm using a very simple Ldap query in my asp.net mvc 2.0 site:
String ldapPath = ConfigReader.LdapPath;
String emailAddress = null;
try
{
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I'm running it under the default app pool.
I have developed a web application 3 months ago to show facebook users by searching username. To access facebook, I have downloaded facebook dll and got application key, and secret key from facebook. My web application was working fine and displaying records from facebook. yesterday onwards, my application is not working fine. I could not get response when I search by name. I have tested the fql in the facebook testAPI tool online. That time i can get response. but the same fql i used in my appliation but it could not get response from facebook when I search by name. If i search by uid i can get response from facebook. here is my code.
facebook.Components.FacebookService fb = new FacebookService();
fb.ApplicationKey = "bfeefa69afdfe81975f0d6136ace3009";
fb.Secret = "9b672d682e1d8befd06382953fc2615b";
fb.IsDesktopApplication = false;
//the below fql gives response as xml.
//select name, profile_url from user where uid = '1730923544' -I can get response for this fql.
//the below fql does not give response as xml. But it gives empty string.
//the below fql does gives us response as xml when i try in facebook testAPI.
//select name, profile_url from user where name = 'Suresh Rajan' -I couldn't get response for this fql.
string s = fb.fql.query("select name, pic_square, profile_url from user where name = 'Suresh Rajan'");
if (String.IsNullOrEmpty(str1))
Response.Write("Empty Response");
else
Response.Write(str1 + " ");
how to search by name in facebook fql.
Using a SubSonic (2.2) SqlQuery object, I am querying a view that contains distinct rows from another table. The results of the query, however, contain multiple rows for certain rows in the view. It appears to be because of a join on a temporary table in the query generated to achieve paging. How can I avoid this duplication of rows?
Bonus points: I have to use the view because SubSonic can't do .Paged() and .Distinct() at the same time. Why not?
My ASP.NET MVC web app has a weird issue. In VS debugging mode it works as expected, but when I publish it to dedicated web server (windows 2003, IIS6) a sql query returns previous data even though underlying data was already updated through the same connection. It looks like as if a query returns cached data. What might be the problem?
View 2 RepliesAnd I realise that a user/member can have mutlple roles.HOW Can I do a select SQL query that returns the result set like this (SQL 2005)
SELECT Roles FROM <tbl>
WHERE UserID = <GUID>
AND Roles IN ('AA','CC')
In my data table i have a Date Column with of type DateTime.
In my sql select query, I want to return all records where the date is today.
here is my code:
My sql query is returning 2 rows by my repeater is only displaying 1.
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I have a .Net 4 Chart Control bound to stored proc. For some customer selected queries the chart will be empty. I would like to display a "No data" message in the empty charting area so customers understand why the chart is empty. I haven't been able to find any information about how to do this.
View 1 RepliesI have a web app for our golf club. When I compute handicap index for each golfer, I have to select the most recent scores and then a subset of those scores depending on how many rounds of golf the golfer has played. All the scores are entered into a single SQL Express table called "Rounds". Verbally, this is what I'm trying to do:
1) select the twenty most recent golf scores (sort on date descending, "take(20)") [if less than 20 records, then select all available];
2) for this set of records, select the 10 lowest scores (or smaller number if golfer has less than 20 rounds);
3) compute the average round differential for the subset of records, etc. to calculate handicap index (this step is working ok...)
My current VB code has this LINQ query (which is flawed -- it selects the lowest handicap differential scores of ALL records for the filtered user):
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How do I modify this query to accomplish items 1) & 2) above? It seems this should be simple, but my experience with queries is still limited.
I inherited some C# code behind that queries a database table and need to add something that displays a "No results" message (using a Label web control, perhaps) if the query doesn't return any records. I'm just learning C# but am coming up short on how to do this. Would anyone be kind enough to point me to an example, or demonstrate? Here's the code I inherited (the programmer who wrote this is no longer available). This is the code behind from the search results page:
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