SQL Server :: Check If Record Already Exist In Database

Jul 13, 2010 02:18 PM

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
If adres <> "" Then
DBCmd = New SqlCommand("SELECT COUNT(*) FROM TBL_Subscribers WHERE email = @adres)", DBConn)
DBCmd.Parameters.Add("@Email", SqlDbType.NVarChar).Value = adres
DBAdap = New SqlDataAdapter("SELECT * FROM TBL_Subscribers ORDER BY ActivateDate", DBConn)
Catch exp As Exception
End Try
End if


Check Whether The Record Exist Or Not

Mar 16, 2010 08:40 AM

when click save button,I want to save the textbox values to database table..If the record is already available then just update that value... I have the code for insert and update..but i don't know how to check the already existing record..I need ,check existing record using only auto generated id

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ADO.NET :: Checking Existence Of A Record In Sql Database Using IF EXIST And Reporting Outcome On Asp Page

Sep 22, 2010 10:23 PM

I have a page that inserts a record to an sql database and I would like to do the following:

(i) Check if a record already exist before trying do an insert

(ii) If a record exist, the page should be able to inform/display a message in a textbox informing the user that the record already exist.

I have seen a number of post on the internet that suggest that one possible solution is to write a sproc and use the T-sql IF EXIST function. However, I have NOT seen a complete code showing (a) how this can be done (b) how to call the sproc from an asp page (c) and MORE IMPORTANTLY how to display a message informing a user that a record already exist i.e. when the record already exist in the database.

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Check Email Address Already Exist In Database Or Not At Registration Time In C#?

Jan 23, 2009 02:40 PM

I have made registration form.in that i want to check whether the email id user is entering is already present in database or not? i have done below code for that.

In aspx.cs page
string iemail;
SqlConnection cn = cn = new SqlConnection(ConfigurationManager.ConnectionStrings["PRIZE-MLSConnectionString"].ConnectionString);
string query = "select count(Email_Address) as Email_Address from Tbl_UserRegister where Email_Address= '" + TXT_EmailAddress + "'";
SqlCommand cmd = new SqlCommand(query, cn);
SqlDataReader dr;
dr = cmd.ExecuteReader();
while (dr.Read())
iemail = dr["Email_Address"].ToString();
if (iemail == "0")
Label1.Text = "available";
Label1.Text = "Not Available";

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Databases :: Check Sufficient Space Exist In Oracle 10g Database Before Executing Script

Jan 12, 2010 04:33 PM

I have .Net web application which connects to Oracle 10g database. I want to check for space availibility before creating Indexes. Also if space is not sufficient then I would like to send an Email message to admin. How to do that from .Net web application?

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Javascript - Check If A File Exist In The Server?

Feb 15 10 at 19:34

string jSFile = ResolveUrl("~/MyProject/JavaScripts/dir/test.js");
if (!System.IO.File.Exists(jSFile))

This code doesn't work and I guess it's the jSFile that doesn't work well with the IO.File.Exists but I know the jSFile has a valid path because when I use few line later


it does attach the JavaScript file to the ASPX and all work fine.

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How To Check A SQL Database Table To See If A Record Exists?

May 10 10 at 15:50

I have a SQL database that creates a record for every document uploaded by the user to the server. I want to check this table before a user uploads a document to ensure they don't upload a file with name that already exists.

I know how to make the connection and make the SqlCommand to query the table for an existing record. But I don't know how to check the record count from the sqlCommand I made.

Does that make sense?

Using myConnectionCheck As New SqlConnection(myConnectionStringCheck)
Dim myCommandCheck As New SqlCommand()
myCommandCheck.Connection = myConnectionCheck
myCommandCheck.CommandText = "SELECT * FROM Req_Docs WHERE Doc_Name =" & DocName
End Using

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Access :: How To Check If Record Is Added In Database

Aug 26, 2010 06:37 PM

I'm trying to put a registration page together in Visual Web Designer.

I would like to send a confirmation Email after someone is leaving his registration data and pressing the INSERT button.

The key fields in my database are: Email, Name, Surname, Address

Before I send the confirmation Email I would like to check if the email value entered in the form is realy added to the database.

I was copy past already some C code in my page, therefore it will be fine if the code can be in C.

- checking if record is realy added to database after pressing INSERT button

- setup the confirmation Email

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Web Forms :: Check The User Account Already Exist Or Not In Smtp Server To Send Mails?

Dec 11, 2009 06:29 AM

How can we find that the user account already exist or not in smtp server domain to send mails by providing his mail id. And if the user account is exist how can he send the mails using smtp server credentials(i.e username and password).

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Check Whether Textbox1 And Textbox2 Entered Value Is Present In Database Record Or Not?

Jan 12 at 10:19

My Database field :

ID Name Age
1 Sumit 23
2 Manish 25
3 John 22

i have two textboxes and 1 button and label1 in my asp.net webform. when i enter Sumit in textbox1 and 23 in textbox2 then it validates the database to check whether then value entered in textbox1 is present in Name column of database and 23 is present in Age column of database....then it redirect to ~.Default2.aspx else shows error message in label.

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Forms Data Controls :: Check Already Exist Data From Database Without Post Back?

Apr 19, 2010 08:27 AM

I have developed an asp.net application ... I have a textbox where user will enter is name ... I need to check if the name is already exist in the database table column when ever user enter their name with out post back . If user exist mean it should show a msg user already exist .....

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Forms Data Controls :: Check If Data Exist In Database BEFORE Insert New Item

Dec 03, 2010 10:31 AM

I have a GridView on a page for maintainance of the database (mdf). Under this GridView1 I have a FormView1 where I use the ItemInsertTemplate to Insert new rows in my database (which shows the data in GridView1). The first textbox (BIDTextBox) i have on this template, contains text which identify a person. I would like to have a routine which checks if the same value that is entered in the BIDTextBox allready exists in the database. This routine should be fired upon leaving the control BIDTextBox.

I have tried with some stored procedure in my database, but that dosn't seem to do the trick. The most logical to me seems to do a loop thru my table "Ansatte" in my database using sql, selecting any occurence from the field "BID" in my table "Ansatte" that is simillar to the text entered in the BIDTextBox.

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SQL Server :: How To Check If A Record Exists In VWD?

Dec 21, 2010 04:02 AM

I am very new to this and have watched a lot of the videos. While trying out VWD2010 and SQL2008 Express, I come across many things, I just don't know how to do. Here is the latest:

I have a Table
UserId - Int - AutoIncrement
FirstName - Var(10)
LastName - Var(10)

I also have an ASP web page that allow the user to enter a first name and last name. It also has a button to submit. What I would like to do is have a Select statement check to see if the name already exists, then send a comment back to the user via a label. If it doesn't exist, then I would like to Insert the info and then again inform the user via label.

SelectCommand="SELECT COUNT (UserId) FROM Users WHERE ((FirstName=@FirstName) and (LastName=@LastName))"
InsertCommand="INSERT INTO User(LastName, FirstName) VALUES (@FirstName, @LastName)"
<asp:ControlParameter ControlID="tbFirstName" Name="FirstName"
PropertyName="Text" Type="String" />
<asp:ControlParameter ControlID="tbLastName" Name="LastName"
PropertyName="Text" Type="String" />
<asp:ControlParameter ControlID="tbFirstName" Name="FirstName"
PropertyName="Text" Type="String" />
<asp:ControlParameter ControlID="tbLastName" Name="LastName"
PropertyName="Text" Type="String" />

On the code behind, I get lost. (Obviously this doesn't work, but I don't know how to go about getting a results back. Protected Sub bSubmit_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles bSubmit.Click

(get a return)
(check return value, if <>0 then
lblResults.Text = "exists!"
end if)
End Sub

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SQL Server :: Check If A Record Exists Before Updating?

Jan 25, 2011 03:54 PM

Is there any benefit (performance wise) to check if a record exists before updating it or do I just go straight in with an UPDATE WHERE?

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SQL Server :: How To Check To See If Record Exists Befor SQL Insert

Oct 13, 2010 03:29 AM

I would like to check and see if a record exists before doing an insert. Here is the code I have tried:


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SQL Server :: User Or Role Doesn't Exist In The Database

Jan 10, 2011 12:25 PM

I am trying to locally install a CMS for my website. During this installation process, it shows me an error "User or role does not exist in the database. Screenshot of the error: Here's the screenshot of the login properties from Management Studio (Properties of the user Sarin)

Screenshot shwoing the database user properties: [URL] User mapping: Screenshot: [URL]

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Access :: Check Record Already Exists In Database By Using access Data Source Objects?

Oct 15, 2009 04:05 PM

how can we check if record already exists in database by using access data source objects. not oledb command & connection objects.

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SQL Server :: Insert Large Amount Of Data In Sql Server 2005 Database With Every Time Duplicate Check?

Feb 06, 2011 06:23 AM

I want to generate 30,000 cards and each card must be duplicate check with database. In my card, there are 2 things. Serial No and CardID. If any card already exists then I generate another card id but with the same serial no.

So how faster way I can generate 30,000 card with duplicate check? Which one I have made application, it takes about 25 minutes to insert.

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Check If Url Exist Before Working With XML?

Dec 26, 2009 09:56 AM

I want to check if url exist before i work with XML. I try [URL] but no one 100% work. What if page get 404 error?

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How To Check Website Exist

Oct 7th, 2009, 11:46 PM

Trying to see if [URL] exists For some reason I can't get it to work. Always times out on me but works for a lot of other sites. Is there something I have to check or is there a setting I should set if I'm having problems connecting to a site? My code is here:

Works for like google and a bunch of other sites, but for some sites that seem to do something like [URL] or something like [URL] jobs Doesn't seem to work.


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Editing Record - Dropdown Selected Value Does Not Exist?

Jun 11, 2009 06:44 AM

Scenario: I have 2 entities Employee and Asset

Employee table (EmployeeID -- PK)
Asset table (EmployeeID --FK)

On the asset definition page, I have a dropdown of Active Employees, User will assign asset to Employee and later on, user goes to Employee definition page and Inactive to that employee. Now user goes to asset page and want to edit that particular asset record, there will be problem in asset definition page when dropdown selected value does not exist, since in asset definition page dropdown have only Active Employee list. note this employee dropdown and similar kind of situation have too much used in my application, given solution have to implement in lot of places in my application, so I need best solution with minimum changes in my application

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ADO.NET :: Joining 2 Tables If Record Doesn't Exist Yet?

Oct 27, 2010 01:51 PM

I have a table "assignments" with records that are assigned to multiple "users" by the "department" they belong to. Each user then can have it's own "status" for each assignment.

When the user logs-in i need to show all his assignments and the status.(but status record doesn't exist yet)

When a new assignment is created I don't want to have to create a new record relating the assignment to the user. I want the relationship to be by the department the user belongs to and the department the assignment was assigned to.

Only thing i can think of is when the user logs in to load the assignments that belong to the user's department then look thru all the records. For each record loop thru the status table. If a record exist show the the status. if it doesn't then make default value and when the users clicks to view the assignment a new status record will be added.

Only thing i don't like is looping thru the status records while looping thru all the assignments.

How else can I do it? I don't see how could join the assignments table and the status table if the status record doesn't exist yet.


BTW, I'm using Linq-to-SQL

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Web Forms :: Check If A Value Exist In Web Config?

Dec 15 10 at 9:26

how can i check if a value exist in my web config using this method?

bool IsDomain()
Uri s =

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Web Forms :: Check If Parameter Exist?

Mar 25, 2011 01:26 PM

i need to check if some parameter exist in Request.Params any one know how to check that? dont use request.params["para"] != or "" i am not try to check if value exist, i need to check if the parameter himself exist before the checking if his not null or empty.

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Check If A User Already Exist In A Gridview?

Feb 05, 2010 12:16 PM

I am in a situation that i cant solvecos i am new to VB.net. I have a page with both a Detail and Grid view. The Detalview does the inserting to display it on the grid view. My table(Using SQL Server) has 3 field Username, Month and Allocation. I want to give an allocation to a user, but if the user already has one for that month, i want it to cancel.

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Check Weather An Url (link) Exist Or Not?

Dec 02, 2009 08:58 AM

how can i check weather a specific URL(link) exists or not?

like http://www.example.com/user/myaccount.aspx

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ADO.NET :: How To Insert Record In Sql Server Database By Using Linq

Feb 08, 2011 10:40 AM

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

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SQL Server :: Programmatically Store Record Into Database?

Apr 01, 2011 04:19 PM

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)";

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SQL Server :: Inserting Record To Database And Retrieving It's Key

Jul 16, 2010 03:56 PM

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?

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Making Checkboxes Check If They Exist In A Table?

Jan 21, 2010 11:24 AM

I'm trying to make checkboxes check if they exist in a table.

What I'm initially trying to do is to list the values is a table e.g. product types, and then if a product has those types assigned to it mark the check box as checked. e.g.

Products Table

Prod No Prod Name

1 Silver Bag

2 Black Bag

3 Red Hat

Product_Types Table

Prod_Type_No Prod_Type_Name

1 Bag

2 Leather

3 Hat


Prod_No Prod_Type_No

1 1

1 2

2 1

3 3

So When I select product 1 (Silver Bag) it shows 3 check boxes for the product types and prod type 1 and 2 are checked as they exist in the Associated_Product_Types

My problem is I cant figure out how to mark them as checked based on the values in that table.

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Web Forms :: Check Value Can Exist In Dropdown List

Feb 10, 2010 04:37 AM

System.ArgumentOutOfRangeException: 'DropDownList' has a SelectedValue which is invalid because it does not exist in the list of items.this question has been for a long time ago but seem no actual answer for it except for catching the exception.I don't want just catch error instead of check first whether the value exist in drop down list. My scenario was different from the other. my data source is bind to a datatable, all is in hard code.

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Access :: Check If The Particular Field Data Exist?

Mar 18, 2011 09:26 AM

For MS Access, how to check if the particular field data exist?

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SQL Server :: Getting Last Value From Database And Check For Posts

Jan 20, 2011 12:17 PM

topic - topicid (pk),sub, message (content), catid(fk), createdby, createddate, updatedby, updatedon, viewers( count of views)

post - postid(pk), topicid(fk), post (content), createdby, createddate, updatedby, updatedon.

As i told in my last post, I am designing a forums website. I am not able to design the query to retrieve the topics for a category for example say catid=1. I want to display it in a grid view as done in every forums.

I made some query :

SELECT Topic.Sub, Topic.CreatedBy,COUNT(Topic.viewers) from topic where catid=1

group by Topic.Sub,Topic.CreatedBy

This is for retrieving the topic name from the subject and the createdby giving the topic starter and the total no. of views of that topic.

Now i want to make a query from the post table displaying the last post in the topic and if the post does not exist, i want to display the 1st post from the topic table as the last post done.

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DataSource Controls :: Copy A Record From One Database To Another On Different Server?

Feb 19, 2010 12:07 AM

copying 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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Iis6 - Application Lifecycle - How To Check Configuration Properties Exist

Feb 22 at 13:06

I've written a singleton class that exposes the web.config properties in a nice get property kind of way.

I want a Load method to parse the data in the config and set the public properties, and I want to throw exceptions (so they are logged in the EventLog) when a configuration key is missing or can't be parsed.

I tried placing the Load() code in Application_Start of the global.asax but then remembered this will only be run once, or until the application restarts.

Where is the best place to put code that you need to run 'everytime' your site is started/run by the user? I basically want the website to stop functioning if certain config properties cannot be loaded.

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Web Forms :: Check If Files Exist In A Directory Based On Filter?

Sep 13, 2009 04:01 AM

I am building an array of filenames to feed a listview for display. All of it works just fine except when there are no files found. So I need to test the directory to see if the files exist that match the pattern "OPT_*.*". But I am having trouble figuring out how to do this. Here is the code I am working with...


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Forms Data Controls :: Check If A User Already Exist In A Gridview?

Feb 05, 2010 12:07 PM

I have detailed view and a grid view, the DetailedView does the inserting into the Grid view. On my table( Ussing SQL Server), i have a username and year and allocation. What do i do so that when an allocation is given to a user for a year that already exit, it refuses.

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Forms Data Controls :: Check The Value Is Already Exist In The Grid View?

Mar 17, 2010 10:57 AM

I am not using any database for data source.I can enter the some value in text box and the entered value is automatically added in the gridview.How can i validate not adding same item numbers in gridview.And i also calculated grand total for amount column.If i remove any records means how to recalculate current total.Any one can tell solution for this issue.I am waiting for reply ASAP.

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SQL Server :: Retrieving Data From Database - To Create A New Consultation Record For A Patient?

Sep 16, 2010 11:59 AM

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.

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Databases :: How To Check Space On Oracle Database Server

Jan 27, 2010 08:19 PM

I have to automate one database process in .Net web applicaiton which uses Oracle 11g Database as Backend.

I need to know two things:

(1) How to check space on Oracle database server? I need space on server and not in the Database itself. My process creates few tables so I want to make sure that we have sufficient space before the process starts.

(2) Also I need to create script to backup Indexes and Triggers on the table so that I can recreate them after data transfer process is completed. Any idea how to create script form c# code?

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