How To Delete Record From SQL Server Database In Web Application
Jun 19, 2012I have a id in label1 ...
on button click i want to delete the data of id from database ...
I have a id in label1 ...
on button click i want to delete the data of id from database ...
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!
I 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 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 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 want to add a new record to a database in my web application.
I use GridView to store the data from Access database.
I use VS2010 with VB
IDE: MS Visual Studio 2008 / SQL Server 2005 Express / SQL Server Management Studio Express 2005
Skills: BeginnerI was trying to delete a table from my database ASPNETDB.MDF ,that DB was previously used for User login information i made it by using asp.net built in login support by opening ASP.NET configuration ,but now i want to built my own simple login control...so i want to remove all the tables made by ASP.NET configuration.I got this error when deleting one of the table"Could not drop object 'dbo.aspnet_Applications' because it is referenced by a FORIEGN KEY constraint"
Before a subscription to a newsletter and the record will be inserted, i'd like to check if the record already exist ina sql-server database. This what i've got as dusfar
adres = TxtEmail.Text
DBConn.Open()
If adres <> "" Then
Try
DBCmd = New SqlCommand("SELECT COUNT(*) FROM TBL_Subscribers WHERE email = @adres)", DBConn)
''Add
DBCmd.Parameters.Add("@Email", SqlDbType.NVarChar).Value = adres
DBCmd.ExecuteScalar()
DBAdap = New SqlDataAdapter("SELECT * FROM TBL_Subscribers ORDER BY ActivateDate", DBConn)
DBAdap.Fill(DS)
Catch exp As Exception
Response.Write(exp)
End Try
End if
how to insert record in sql server database by using linq?
still i m using MVC 3.0 send me full detail example for insert record using Linq
What I want to do is to store new article and for each article choose a category..
I have 3 tables for example :
1. Article table : ArticleID - int , Article - nvarchar(max) .......
2. Categories table : CategoryID - int , CategoryName - nvarchar(150)
3. Article_Categories : ArticleCategoryID - int , ArticleID - int , CategoryID - int (And I set up relation in this table...)
I can store data into tables 1 and 2 that is working fine.. But I stuck with Table 3.
So far my code looks like this :
protected void Button1_Click(object sender, EventArgs e) //Add new Category (working fine)
{
string connectionString = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
string insertSql = "INSERT INTO Categories(catname) VALUES(@catname)";
[code]....
I am wanting to insert a record into a table in SQL then retrieve its key at the same time, the key is a int that is automatically generated, I read something about the '@@Identity' function, is this what I need? How could I then bind this to a label in the ASP.net page?
View 12 RepliesWhen we create or install any database using Visual Studio - The database gets saved in SqlExpress instance.How I can see the list of all the database that are ins SqlExpress and how to delete any of those database?Is it possible using DOS ? I don't have SQL Server Management studio
View 6 Repliescopying some data from an existing remote database(SQL2005) to an existing local database.First - I have very little experience in this area. I'm using Visual Web Developer 2008 (VB). Currently if I want to update some data in the local database I do something like this:
Dim conn As Data.SqlClient.SqlConnection = New Data.SqlClient.SqlConnection(ConfigurationManager.ConnectionStrings("CCCdbConnectionString").ConnectionString)
Dim cmd As Data.SqlClient.SqlCommand = New Data.SqlClient.SqlCommand("UPDATE [Orders] Set [OrderStatus]
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I have one text box in my page and 1 button
users type some number in this TB
I want when users enter their number in text box and click on button to insert it to database
it checked if in database was that number it show message that "this number is in database please type other number"
how i can do it?
How to write a Sql Query for insert, Delete for Image from sql server 2005.
View 2 Replies I'm having a question about retrieving data. I'm using VS 2008 and I have to create a new consultation record for a patient and I've already created a database with 3 tables, which are doctor, patient and consultation.
I have 10 records saved in consultation table, and I've made a aspx form which contains a DetailsView that ask for new consultation details to be added. But I have to be able to get the doctor and patient information from the database and put in the DetailsView, then fill in the rest of the consultation details. The information entered have to be written to the database in the consultation table. But I don't know how to get doctor and patient information from database and apply them into the DetailsView so that doctor who wants to add new consultation details can select patient and doctor information from the database.
I was thinking maybe I need to do a query with insert statement and apply into the DetailView,this is the query i have:
INSERT INTO [Consultation] ([ConsultationID], [GPname], [PatientFirstName], [PatientLastName], [Height], [Weight], [IllnessDescription], [Diagnosis], [Date]) VALUES (@ConsultationID, @GPname, @PatientFirstName, @PatientLastName, @Height, @Weight, @IllnessDescription,
@Diagnosis, @Date)
as you can see, I need to get the GPname, PatientFirstName and PatientLastName from the database tables and the rest will be filled in by the doctor.
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 am using sql server 2005. In my project i wanna auto delete the data from the database after a fixed interval of time say (30 days); Is there any automatic process to delete the data from the database without the user intervention..
View 19 RepliesI'm having a gridview in my aspx page with checkbox, User can select one or more than one record(s) at a time and clicks on delete button, Then i'm constructing an object of my DTO and adding all the checked row's Primary Key (DataKeyNames - GUID's in case) to a serializable class and generating an XML and sending it as parameter to the Stored Procedure.
My Doubt is, can i bulk delete all the rows from database table those are present in my XML document??
If it works, I can do bulk update with XML only, i already did bulk insertion by generating an XML..
My Another Question is, Will it affect the performance? Each time when i construct an DTO object and adding it to the Generic List??
WHich one is better, I mean ObjectDataSource or SQLDataSource or my XML method?
My XML will be like this
<root>
<Customer>
<CustomerID>GUID1</CustomerID>
<CustomerID>GUID2</CustomerID>
<CustomerID>GUID3</CustomerID>.....
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?
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 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.