Is it possible to use LINQ to delete a row in a table within an SQL database? I am using an ADO connected command statement to delete a row where a string column equals a name. But, I would prefer to use an easier way with LINQ, if possible.
View 3 Replies I have written a routine to delete a record from a table. I want to include a statement to 'close' the connection to the table but I do not know the syntex of the statement that will do this. My code is as follows:
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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 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?
how to Delete Child Record And Later Delete The Parent Record if it has no child
Trigger might be the answer but i don t know how!
when i want insert a record i see an error like this Can't perform Create, Update, or Delete operations on 'Table(MainMenuLink)' because it has no primary key. with this codes:
MyLinqDataClassesDataContext db = new MyLinqDataClassesDataContext();
MainMenuLink li = new MainMenuLink { Link = "www.tprogrammer.com", LinkSubject = "subject" };
db.MainMenuLinks.InsertOnSubmit(li); [code]....
I have a gridview with edit and delete parameters enabled. When I click on the edit link, I can edit the record successfully. However when I click on the delete link, nothing happens (the record does not get deleted).
View 5 RepliesI created a ListView and attempted to delete a record using the delete button and native procedures. It failed and threw an error.Pass in a valid dictionary for delete or change your mode to OverwriteChangesIn researching this issue, it appeared there is a problem with the list view when deleteing and
ConflictDetection is set to
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I am counting from a table for that i have written code as below
protected void get_Id_Afterpoint()
{
int counter = 0;
string strSql = "select count(*) as ID from tblEnergy where ID=?";
OdbcCommand com = new OdbcCommand(strSql, con);
com.Parameters.AddWithValue("ID", DropDownList1.SelectedValue);
OdbcDataAdapter oda = new OdbcDataAdapter(com);
DataTable dt = new DataTable();
oda.Fill(dt);
if (dt.Rows.Count == 0)
{
lblID2.Text = "1";
}
else
{
counter = dt.Rows.Count;
counter = counter + 1;
lblID2.Text = Convert.ToString(counter);
}
}
there is no record related to DropDownList1.SelectedValue. but as i am counting if(dt.rows.count) and i put break point on the bolded part it shows 1 record. how it can be possible?
how can i select a record from A table and insert into B table using linq?
View 2 RepliesI have a list of documents and different actions performed for each records. To delete the record i need the id to pass to the controller. I use JQuery to perform deletion. In it I need to Id of the record. The Following is my view:
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$.post("/BuildDocument/DeleteBuildDocument", {need to pass id here..}); need the id(BldDocId). How can i get it?
I'm trying to delete a record in DataGridView but it is giving me this error:
Must declare the scalar variable "@reg_id".
My reg_id is the primary key column in the table. How can I resolve this?
I have asp.net app where I am using gridview for data showing, editing and deleting. Now I want to delete or edit record from table and I need to pass 3 cols in DataBinder.Eval(Container.DataItem,"colName"). how i can do this?
EDITED
Basically when i need to update or delete record from asp.net app, I have to pass values of 3 columns (which are composite keys) to my UDF. Now How I can pass 3 different values to DataBinder.Eval() and reading them in GridView Rowcommand event.
I have one table named 'dbo.ac_Products' Within this table there is a column named 'ProductId' There is also another table named 'dbo.ac_CatalogNodes' Within this table there is a column named 'CatalogNodeId' and a column named 'CatalogNodeType'
I need to delete all the rows from 'dbo.ac_Products' and 'dbo.ac_CatalogNodes' where 'ProductId' = 'CatalogNodeId' and 'CatalogNodeType' = 1
I am trying to delete or add rows in a table but since the table is in an update panel,upon deletion the row goes away and then comes back.I have tried using return false but it does not seem to work in IE or FF.
I am using the following code:
$(document).ready(function () {
$(.table).click (function ()}
(this).parent().remove();
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Basically I need a way to disable the postback.
when ever i click on the delete button,then one Message box should come, it must ask "Are You sure Do YOU want to delete this record?" it should have two options YES and NO ,if i click YES the Record should be delete and if I click on NO ,the record will not be deleted. how can i do this in C#.net and in asp.net.?
View 13 RepliesI have a simple mvc application which perform the CRUD functionality to manage UserDetials. I need to show a confirmation box when trying to delete a record.
View 6 RepliesI have a form where users can subscribe and unsubcribe to my email list. so far, i have the subscribe button working fine "add member" function. Now i need help with my "delete member " function (unsubscribe button). it will allows the user to delete their record from the database. When I run the code and click the "unsubscribe" button, i can't get the logic correct so that it will delete the user's record if it exisit. here's the code i'm using for the subscribe and unsubscribe buttons
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class joinmailinglist : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void addMember(object sender, EventArgs e)
{
// here you are defining the classes for the database and the linq
mailinglistClassDataContext Class = new mailinglistClassDataContext();
mailinglistMember member = new mailinglistMember();
// Now we are going to add the data to the member
// Here we are going to let the system define a GUID for the unique user ID
member.memberID = new Guid();
// here we are going to capture the user inputs and we are going to set these to lower case especially the email so that we can do a proper comparison later.
member.fname = txtFirstName.Text;
member.lname = txtLastName.Text;
member.email = txtEmail.Text;
// Here we are going to create the URL so we can later remove the user if they decide to opt out.
member.removeurl = "http://removeuser.aspx?code=" + member.memberID.ToString();
// Here we are going to use a LINQ query to search the class of mailinglistmembers for any emails that contain equal values of the text field and select it. var duplicatecheck = from emails in Class.mailinglistMembers where emails.email.Contains(txtEmail.Text) select emails...............................
I am using Table Adapter to insert records into my database. I first insert my member record into the database and it has no errors, after that i insert the contact records into the table. however I got the following error: You cannot add or change a record because a related record is required in table 'Member'.
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I want to know how to Update / delete the table records in ASPNETDB.MDF in single update / delete query ?
View 1 RepliesThis is my House_p table
Iamge3 Image2 Image1 Name ID
3.JPG 2.JPG 1.JPG SARA 1
I have added a data grid view in Asp page, data is retrieved from the sqlserver2005 and its showing in data grid view, even i have made the auto-generate-delete as TRUE in the properties but when i run the page and click on delete button its showing error.
View 1 RepliesGeneral Info:Aspx page holds an Ascx User control. Inside the User control, the Repeater is contained inside a View, contained inside a Multiview.
Asp.Net 2.0 framework / C#
Details:I have a repeater(inside an ascx user control) that shows records, and the first column is a checkbox. If checked, that row will be deleted.OUtside the repeater, I have a button that will deleted all rows that are checked.Everything works fine, but have been asked to add a pop up "confirm delete" message that includes the number of records that will be deleted if the user clicks "Ok" on the pop up.
Something like: "You are about to delete 8 records".
Currently my button looks like this:
<asp:Button ID="btnDeleteAllRecords" runat="server" Text="Delete all Checked Records" Onclick="btnDeleteAllRecords_Click" OnClientClick="javascript:GetCbCount();" />
I have this javascript code block:<script type="text/javascript">
function GetCbCount()
{
var cb = document.getElementById("rptrVoicemail").getElementsByTageName("input"); [code]....
I have 3 pages, one to add a category, one to edit the category, and one to delete the category. The add and edit work fine. The delete is not working for some reason. I click the link on my site to delete it, and I'm just staring at the green bar in my browser taking a long time. The add and edit don't take long at all to perform their function. I'm thinking this is a connection string issue, but I don't see how it can be the case. It relies on web.config for it just like the other pages. Following is the delete page code behind and also delete cascade from the business logic area. After the page refreshes, I'm not getting any diagnostics or error messages which I have in the code. Doesn't this have to mean a db connection issue?
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I have a slight issue with deleting a record that is stored on two separate SQL servers.
I am using an ASP.NET databound control on a datagrid with delete button commandfield linked to one data source.
Is there a way of deleting the same record from another data source at the same time?