I want to create a LINQ SQL-Group-Query... This is my LINQ-Query:
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I want to Group this, like this normal SQL-Query do it?
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Furtermore, when iam using this normal sql query the programm needs a Type .. for example Dim reqdata(of Iqueryable(of xxx)("sql query...") ... whats the Type of this ? When i select more tables than ones ? there is said thats <anonymous type> ?
I'm using a linq group by query (with two grouping parameters) and would like to use the resulting data in a nested repeater.
var dateGroups = from row in data.AsEnumerable()
group row by new { StartDate = row["StartDate"], EndDate = row["EndDate"] };
"data" is a DataTable from an SqlDataAdapter-filled DataSet. "dateGroups" is used in the parent repeater, and I can access the group keys using Eval("key.StartDate") and Eval("key.EndDate").
Since dateGroups actually contains all the data rows grouped neatly by Start/End date, I'd like to access those rows to display the data in a child repeater. To what would I set the child repeater's DataSource? I have tried every expression in markup I could think of; I think the problem is that I'm trying to access an anonymous member (and I don't know how.) In case it doesn't turn out to be obvious, what would be the expression to access the elements in each iteration of the child repeater? Is there an expression that would let me set the DataSource in the markup, or will it have to be in the codebehind on some event in the parent repeater?
I've a table with datetime null field in sql server. I'm trying to group the results based on the year in that field. But, when I wrote linq query, I didn't get intellisense for Year when I type that field. It only shows HasValue and Value. I think because it is converted nullable type. How do I do the grouping in this case?
View 5 RepliesI 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.
I have T_articles to save the articles.
each article has authorCode , and categoryCode.
each article can be modified by the author several times.
and I save every modification in the T_articles in a difference row.
now I want to dislpay for each autor:
author name, article name , article category's name, last modified date
In SQL I should to it like that:
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I try to write it in Linq so:
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so I got error:
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and again I got an error:
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Using Linq to Sql how do i group the following 2 tables.
Orders Table:
CustomerID | Name |Date
1 | order1 | 2010-01-01
2 | order2 | 2010-01-01
2 | order3 | 2010-04-01
Calls Table:
CustomerID | Name |Date
1 | call1 | 2010-01-01
3 | call2 | 2010-06-01
2 | call3 | 2010-05-01
I want to group the two tables by date , Result:
Date | Orders | Calls
2010-01-01 | 2 | 1
2010-04-01 | 1 | 0
2010-05-01 | 0 | 1
2010-06-01 | 0 | 1
i know how to group a single table ,from o in Orders group o by o.Date.Date into og select new {Date = og.Key,Orders= og.Count()};
I have this group-join syntax but I couldn't get the distinct value from the relational tables below.
Table_1
key_1 t1_value
1 Food
2 Sports
3 Leisure
4 Trip
5 Zoo
Table_2
key_2 key_1 t2_boolean
15 1 True
16 1 True
17 1 True
18 2 True
19 2 True
20 2 False
desire result:
[code]...
I am wonder how I can generate a result table from linq to sql as below
Car sales table
Toyota small
Toyota passenger
Toyota small
Honda small
Honda small
Honda passenger
Honda small
result table
Brand small passenger total
Toyata 2 1 3
Honda 3 1 4
GridView1.DataSource = (from dtCarSales.AsEnumerable() .....
I'm attempting to further reduce a dataset/table by various user input. Part of this process is grouping the data by a timestamp prior to a summation. I'm trying to use LINQ and cannot get the data returned that I need.
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How do I translate the following query into LINQ to SQL?
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1
down vote
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i have the following objects:
Event:
- EventID (PK)
- GroupID (FK)
- StartDate
Group:
- GroupID (PK)
- GroupName
What i need to do is select the last 5 events for each group using LINQ to Objects. I tried starting with:
[Code]....
But i'm not sure how i only take the last 5 per group.
The simple way of doing this is to get the groups and then have a property on that which returns the last 5 events but if i databind this i will have to use a nested Repeater/ListView. Ideally i would like to have a row foreach event.
I am struggling to create a webservice method using LINQ technology and to populate a dropdown in a form. Here is the Webservice code.
[WebMethod]
public
string[] GetAllCountries()
{
LinqClassesDataContext db =
new
LinqClassesDataContext();
var q =
from c
in db.ListContinents()select
c;
return q.ToList() ;
}
And here is the form code behind
protectedvoid
Page_Load(object sender,
EventArgs e)
{
WSClass WS =
new
WSClass();//bool
ds = WS.GetAllCountries();
var v = WS.GetAllCountries();
ddlContinent.DataSource = v;
ddlContinent.DataBind();
}
How do i create a drop down box that can break by group?
for example.
bachelor
- science
- art
master
- mba
- mis
- cs
Let me see if I can explain what I am trying to do...From a gridview a user would be able to select as many rows as they wanted and create a "custom group" ... that user group would then be available from a dropdown list for future selection. So next time they would just select the "custom group" from a dropdown list and the resulting datagrid would only have those rows that were originally selected.So if I had a datagrid which had: empoyeeID, name, address, phone#, etc...
1. I select what ever rows I want
2. Create a name for the new custom group
3. Click a "save group" button ... this would save all the employeeID's from selected rows.
4. A dropdown list would then be updated with the new custom group ... ie, MIKE's GROUP
5. User could then select MIKE's GROUP from a dropdown list and work only with rows that were added to it.
I need to create individual account for a big group of people (around 200) from an Excel spreadsheet. What is the best practice? It will take too much time to create account using web form. I think there must be a way to do it. I tried to use Stored procedures created by ASP.NET.
View 2 RepliesI have a VB.Net application which generates quite a few Crystal Reports. One report in particular has a Group Section. What I am trying to do with my VB.Net app is pass a value (a sql server column name used in the report). This value is represented by radio buttons. For example, the user may check either "ZipCode" or "State" or "Category" or "Type" or "Vendor". Each of these options represent a column in the database table used in the report. I simply want to be able to write the "SelectionFormula" using one of these options but not sure how to go about it.
View 1 RepliesI'm trying to create a menu structure, subpages within pages, for use with my cms. I have 3 tables in sql server, I would like to query all three tables and list those pages with a certain siteid, and subpages where the subid is the pageid. how to use the GROUP BY Statement to create the menu below? Or could I use vb.net to display it for me? Something like this:
sitename
page
page
page
page
subpage
subpage
subpage
page
page
Here is my query so far:
SELECT * FROM sites
LEFT JOIN pages ON sites.siteid=pages.siteid
LEFT JOIN subpages ON pages.pageid=subpages.pageid
WHERE sites.siteID = 1ORDER BY sites.siteid, pages.pagesub ASC
These are my tables:
sites
siteID int Unchecked PK
siteName nvarchar(MAX) Checked
siteAdmin nvarchar(MAX) Checked
siteLive bit Checked
Pages
pageID int Unchecked PK
siteID int Checked FK linked to siteid in sites table
pageLink nvarchar(MAX) Checked
pageBody ntext Checked
pageSummary ntext Checked
pageTitle ntext Checked
pageOrder int Checked
pageHome bit Checked
subpages
subID int Unchecked PK
PageID int Checked FK linked to pageid in pages table
subBody ntext Checked
subSummary ntext Checked
subTitle nvarchar(MAX) Checked
subOrder nvarchar(MAX) Checked
I'm trying to build a linq2Entity/gridview function for a forum, that draws data from multible tables.The result should be: Get the latest 10 threads that user(xx) has replyed in, that is not disabled or has a subject that is not allowed.Include information on the last post, thread owner user, and last post user, in each thread.
ere is my code... is returns the correct threads and some that should not be there.
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this is what i used:
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It throws me out saying genral access denied... finding the exact solution on how i could create a configuration page such that a certain set of groups could be assigned to my application.
Stack-Overflow :3 I've got a kind of hard-case question.
So I'll try clearly explain my idea with my poor english :/ need select to DataTable SOME values from ???_**GetDisplayData **procedure for each day of previos month (GROUP IT) where group rules for different columns is different
I need to select some values in stored procedure from other stored procedure like this :
SELECT X FROM Y_Procedure(@ProcedureParameters)Also I need to select from dynamic SQL Procedure like
Y_Procedure=@Y+'_Procedure'
SELECT X FROM Y_Procedure(@ProcedureParameters)
Also I need to load it to DataTable :-/INSERT INTO @Report (CellHorizontal, CellVertical, CellValue) --to TABLE
SELECT Date,X2,X3 FROM Y_GetDisplayData(@Param)
SET NOCOUNT OFF;
SELECT *
FROM @Report
GetDisplayData works as select with parameters and that doesn't returns SQL DataTable
And there is no way to recode GetDisplayData's procedures, it's just constant procedures for me.Finally I need to Group nodes from this table
INSERT INTO @Report (CellHorizontal, CellVertical, CellValue)
SELECT T1.Date,
IF ((Select grouptype...)=1) T1.X2 + T2.X2
ELSE IF ((Select grouptype...)=2) AVG(T1.X2,T2.X2),
IF ((Select grouptype...)=1) T1.X3 + T2.X3
ELSE IF ((Select grouptype...)=2) AVG(T1.X3,T2.X3),
(SELECT T2.Date,X2,X3 FROM Y_GetDisplayData(@Param) T2
WHERE T2.Date>T1.Date AND T2.Date>=T1.Date)
FROM Y_GetDisplayData(@Param) T1
GROUP BY EVERY DAY ???--and here is epic fail
I can make all stuff on asp server :And C# allows me to use something like SelectCommand = IzmProc + "_GetDisplayData"; And then I will work (select special data) with DataTables on ASP.NET Server but it's better to make all on SQL ... But looking like it's just unrealizable on SQL >_<
I gonna think about C# realization,but my code is very weird , got errors and doesn't works >_<
public static DataTable GetReport(string Param)
{
System.Configuration.ConnectionStringSettings connSetting = ConfigurationManager.ConnectionStrings["FlowServerConnectionString"]; [code].....
I have the following:
[code]....
I keep getting this error:
Message = "The conversion of a char data type to a datetime data type resulted in an out-of-range datetime value."
What i'm trying to do is group by ContentObjectId and then get StartDate that is greater than today.
I'm using entity framwork and MS SQL2008
I'm new to LINQ and C# but I have an xml file generated from a database table. Within the XML document is a element called "group", I would like to wrap all group elements with the element called "groups".
An extract of the XML document is:
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In my organization we use nested groups. For a particular usage, we have a group (let's assume that the group name "kuku"), and the names of all the nested groups under it contains "kuku" as well.
We may assume that no other group in the LDAP has "kuku" in the name.
I need to create a filter which will return all the users which belong to one of the "kuku"s group.
Obviously, using this filter will bring only the head kukus
(&(&(objectclass=user)(objectclass=person))(memberOf=CN=kuku,cn=...rest of the group DN...))
How can I use wild card to fetch all users which belong to any kuku?
For example: (&(&(objectclass=user)(objectclass=person))(memberOf=CN=.*kuku.*))
I need to develop a page in my applicaiton like the image for the user lists.
I need to get the list of users under a group and need to show likw this.