I use Linq to Entities and want to update and delete data. I know the ID of the object / record.
How can update and delete without first selecting the complete object (asuming that this is better for performance)?
With linq to entities, how can I delete and update data inside a database without first selecting the complete entity at first?
View 4 RepliesI have a table and i want to use this table in asp.net page
how i will call the stored procedure on the basis
of Stored procedure's Action .
CREATE TABLE Std_Enquiry(
StdID int IDENTITY(1,1) PRIMARY KEY CLUSTERED ,
FirstName varchar(50) ,
LastName varchar(50) ,
[Code].....
I have a question about linq delete.
I have 2 table in database and they are joined.
First Table: UserID, UserName, UserSurname, UserPhone, CompanyId
Second Table: CompanyId, CompanyName
First Table I have many recods with related second table.
I want to delete one company in second record, But firtly I have to delete users (more than 1)
How can I delete it with using linq?
I want to know how to Update / delete the table records in ASPNETDB.MDF in single update / delete query ?
View 1 RepliesI've applied this code from [URL]
and it is working fine except for updating TreeView after Insert/Update/Delete.
[Code]....
how to Delete with linq to sql using mvc 3.0? how to delete in mvc 3.0
View 6 RepliesI am working on delete confirmation box in asp.net mvc using linq to sql. I want a delete confirmation box if i want to delete record corresponding to a particular id.If i click ok, it has to map to Delete controller and if i click cancel ,it has to be retained in the same page.
View 3 RepliesI want to delete the items in db using linq to sql below is my code
[Code]....
here i am very much confused about this var delt= from x what is x here? and dc2.emps.deleteonsubmit (here what is emps?)i am getting errors like emp id doesnt exist in the current context.
I have a datatable in which some of the rows contain a column with duplicate values. I need to be able to delete the duplicate rows and leave only one, doesn't matter which one.
The rows might look like this:
A, B, C, D
E, F, G, D
H, I, J, D
I need to delete two rows and be left with only one.
how can i delete a row in datatable using linq to dataset?
I have a dataset in my project, need to delete some rows filtered by ID
how can i do?
how to delete all the products from table against a category id using linq.
View 2 Replieshope to delete all records in DBPrograms, is the following code correct?
DBContext db = DBContext(PublicDBPar.ConnectionString);
db.DBPrograms.DeleteAllOnSubmit(db.DBPrograms);
db.SubmitChanges();
how would i do my Gridview delete command like a update command?
im using a datasource... and my delete command is like my update command... so i can change the status into "INACTIVE"...
DeleteCommand="UPDATE ACCOUNT_MAINTENANCE SET am_status = 'INACTIVE' WHERE (accmain_no = @accmain_no)"
UpdateCommand="UPDATE [ACCOUNT_MAINTENANCE] SET [account_type] = UPPER(@account_type), [min_deposit] = @min_deposit, [min_capital] = @min_capital WHERE [accmain_no] = @accmain_no"
when i press my delete command at gridview... the status changed into "INACTIVE" but when i refresh or press f5... it automatically update the status into "INACTIVE" also...
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)
I have a GridView and on a row being deleted I trigger the GridView1_RowDeleting sub, but I receive an error "LINQ to Entities does not recognize the method 'System.Web.UI.WebControls.TableCell get_Item(Int32)' method, and this method cannot be translated into a store expression." Code is:
Private Sub GridView1_RowDeleting(sender As Object, e As System.Web.UI.WebControls.GridViewDeleteEventArgs) Handles GridView1.RowDeleting
' The deletion of the individual row is automatically handled by the GridView.
Dim dbDelete As New pbu_housingEntities
' Remove individual from the bed.
Dim remove_bed = From p In dbDelete.Beds _
Where p.occupant = GridView1.Rows(e.RowIndex).Cells(3).Text _
Where p.room = GridView1.Rows(e.RowIndex).Cells(6).Text _
Where p.building = GridView1.Rows(e.RowIndex).Cells(5).Text _
Order By p.id Descending _
Select p
remove_bed.First.occupant = ""
dbDelete.SaveChanges()
' Increase number of open spaces in room.
Dim update_occupancy = From p In dbDelete.Rooms _
Where p.room1 = GridView1.Rows(e.RowIndex).Cells(6).Text
Where p.building = GridView1.Rows(e.RowIndex).Cells(5).Text _
Select p
update_occupancy.First.current_occupancy = update_occupancy.First.current_occupancy - 1
dbDelete.SaveChanges()
End Sub
The specific line erroring out is: remove_bed.First.occupant = ""
I am trying to delete record from table with proper mapping from linq to sql.There is an error stating that Rmove method not found and are u missing an assembly reference.
AdventureWorks db = new AdventureWorks("Integrated Security=sspi");
var query = from con in db.Contact
where con.LastName == "Klein"
select con;
foreach (Contact del in query)
{
db.Contact.Remove(del);//???Remove not working
}
db.SubmitChanges();
textBox1.Text = "Contact deleted.";
I want to delete entity from linq class this entity has one to many relationshipe with another table so I want to delete all entities related to this one for example I want to delete classroom so i should delete all student is this classroom fisrt i don't how to delete all these student in one time
View 1 RepliesI need a Listview that will show info from several database tables. My delete button, will not delete the record from the database. I cannot get DeleteOnSubmit() to work at all. I am in the very beginner stage. This is my first project. I thought this would be a good project for learning purposes.
Here is my code:
[Code]....
I have a ListView which I populate using DataTable.
In each row I have a delete button. When the user clicks on the delete, that particular row is deleted in the DataTable Table.
After I perform the delete, I want to avoid page reload just to populate the ListView with the new set of records without showing the deleted row.
I suppose LINQ is the best choice for this. But I am unable to implement it.
[Code]....
I have a gridview with linq and in the itemtemplate I have a column like this :
Bind("SUPERFICIE","{0:N00}")
If I display my gridview, I have this kind of value : 6'555
When I delete this row I have this error :
Failed to define one or more properties of type DS.MY_TABLE 6'555 is not a valid value for Decimal.
Apparently, when I use a format on bind, it change my values in my ds and I cannot delete my row!
I don't understand, because in my logic with the bind format I don't need to correct some formats for delete a row !
i am new in linq and i want update and delete table row by linq but when table contain forign key it show error casecading is not valid but all are correct if table not contain every thnk is correcty syntax is
var matchedNetworkGroup = (from NetworkGroup in dataContext.GetTable<ob_NetworkGroup>()
where NetworkGroup.GroupID == id
select NetworkGroup).SingleOrDefault();
try
dataContext.ob_NetworkGroups.DeleteOnSubmit(matchedNetworkGroup);
[code]...
I want to populate the gridview in asp.net web application. in fact I am able to do it but my scenario is I want to develop it based on user authentication. means Let say Admin is logged in then he must authorized to edit all fields of row in gridview. but say if Employee is logged in then, he should only applicable for to edit Name and Address columns in gridview. can i do this ? what I have to take under consideration. in which event i can do this?
View 1 RepliesI have a simple gridview. I can view the data and I have gotten the insert to work (code behind).
Code:
Dim vRepairId As String = Request.QueryString("REPAIRID")
SqlDS_WOAccount.InsertParameters("WorkOrderID").DefaultValue = vRepairId
SqlDS_WOAccount.Insert()
<asp:GridView ID="GridViewAccount" runat="server" AutoGenerateColumns="False"
BackColor="White" BorderColor="#E7E7FF" BorderStyle="None" BorderWidth="1px"
CellPadding="3" DataSourceID="SqlDS_WOAccount" Font-Size="8pt" Width="100%">
<RowStyle BackColor="#E7E7FF" ForeColor="#4A3C8C" />
<Columns>
[code]...
I'm kind of new to ajax. I normally just use the canlendar and some popup stuffs.i'm wondering what is the practice to doing Insert, Update, and Delete on GridView/FormView with ajax.s UpdatePanel the best thing i can use it with Insert, Update, and Delete?
View 1 Replies