DataSource Controls :: How To Define A Field Value For Deleting A Data Row
Mar 12, 2010
From my Employees table of the Northwind database, how do I delete a row? I have a row with a LastName field = WWWW How to write the string sql?
SqlConnection con = new
SqlConnection(connectionString);
string sql =
"DELETE FROM Employees WHERE LastName =" + WWWW;
SqlCommand cmd =
new
SqlCommand(sql, con);
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Jan 27, 2010
I can use similar code below to select a row in my database when I enter a value (username) in text box and it successfully retrieves.however, I'd also like to delete row from database based on the username i enter in text box. My code runs but no row is deleted...my code is:
SQL:
private AdminTableAdapter adminGetUsers;
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Mar 18, 2010
how to delete from detailview without using datasource?
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May 20, 2010
when I press the delete button on my girdview, I want to get the [Path] filed value of the deleting data row In VB code. How could I do that ?
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Apr 22, 2010
I'm looking for ideas on deleting data from the multiple SQL tables with LINQ (C#).
My existing solution does the following:
1. DeleteAllOnSubmit( Subset of the data from the child table)
2. DeleteAllOnSubmit( Subset of the data from another child table)
3. DeleteAllOnSubmit( Data from the parent table)
4. CommitChanges()
All this resides within a single method, which makes it ugly and not re-usable.
I have considered the following alternatives, but I decided not to use them:
1. Cascade delete on the tables.
2. Do a join on all tables from which I will remove the data, but I'm not sure yet whether I could pass a join query to DeleteAllOnSubmit().
3. Write stored procedure(s) to delete data from each table. I don't have the time to implement this due to a large number of tables and the time constraints.
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Jan 21, 2010
I'm using the asp.net membership on my website. On the User Administration page i've got a GridView to show the details of the users on the site. As a datasource rather than just using the Membership.GetAllUsers function i've got a SQLDataSource as i need to display user information from 3 different tables. I'm trying to add a delete button to the GridView. I'm setting the Membership's UserName as a DataKey and then using the RowDeleting event to call Membership.DeleteUser for the appropriate UserName. This works fine and the user is deleted however i then get an error showing up that "Deleting is not supported by data source 'SqlDataSource1' unless DeleteCommand is specified."
I don't want to use the SqlDataSource for deleting as i've already done it using the Membership. How can i stop it from trying to do this? Here is the cut-down that i have if you're interested. The selectcommand in the sqldatasource was auto-generated by it.
[Code]....
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Jun 4, 2010
I am using 3 web controls ,two are cascading dropdownlists used to filter gridview control bound to a datasource.
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Jul 2, 2010
I use a sp to insert/update records. Parsing a DataTable (many) to a user-define table typesTable type:
[Code]....
Table to Insert/Update:
[Code]....
Will this work (snipp from sp)
[Code]....
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Jul 9, 2010
I have 3 tables User, role and UserInRole THe entity frame work made entities for User and Role and I have successfully made a join with the user and role entities using user.add(role); but I can't seem to get it to remove the link (I want to retain the user and role just remove their association).
using (ProviderEntities context = new ProviderEntities())
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Jun 1, 2010
I have table with 1000 rows. is it possible to delete top 500 rows with truncate statement ??
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Feb 19, 2010
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Mar 3, 2010
I wanna join all the field as a new col.
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Apr 20, 2010
how can i retrieve the all foreign keys against a single primary key. i mean to say that if a table contain a primary key then it becomes as foreign keys in which tables.
i want to take that nam of that tables and on the base of that tables then i am to delete from all the entries. e.g: if a primary key's column entry deleted then all foreing key entries should also be deleted.
there are 988 tables in a single database. it can't be possible to go for each table to setup foreign key to ON DELETE CASCADE.
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i want to do it from programatically. i am using sql server 2005
i have completed this till to that , it retrieves all foreign keys but how to delete now on the base of priority.
[Code]....
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Apr 7, 2010
I have a 20 to 30 fields on a form. Most of them are optional. However, the users can fill out what they want. If a user dosen't fill in a field when data is sent to the database it's sent as blank, instead of NULL. Is there a way I can generically say "for all textboxes if Equals("") then DBNull.Value". Without going through each and every textbox?
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Apr 13, 2010
Once again, I find myself stuck!
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Dim RSI As Data.SqlClient.SqlDataReader = SQLI.ExecuteReader()
RSI.Read()
Dim FamilyName As String = "0"
While RSI.Read
FamilyName = Convert.ToString(RSI("family_name"))
End While
Response.Write(FamilyName)
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sqlCon.Close()
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Mar 25, 2010
I am trying to get all records 7 days from the Purchase date field using this query:
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