SQL Server :: Check If A Record Exists Before Updating?
Jan 25, 2011Is 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 If A Record Exists In VWD?
Dec 21, 2010I 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)"
<InsertParameters>
<asp:ControlParameter ControlID="tbFirstName" Name="FirstName"
PropertyName="Text" Type="String" />
<asp:ControlParameter ControlID="tbLastName" Name="LastName"
PropertyName="Text" Type="String" />
</InsertParameters>
<SelectParameters>
<asp:ControlParameter ControlID="tbFirstName" Name="FirstName"
PropertyName="Text" Type="String" />
<asp:ControlParameter ControlID="tbLastName" Name="LastName"
PropertyName="Text" Type="String" />
</SelectParameters>
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
SqlDataSource1.Select(DataSourceSelectArguments.Empty)
(get a return)
(check return value, if <>0 then
lblResults.Text = "exists!"
else
SqlDataSource1.Insert()
lblResults.Text="added!"
end if)
End Sub
SQL Server :: How To Check To See If Record Exists Befor SQL Insert
Oct 13, 2010I would like to check and see if a record exists before doing an insert. Here is the code I have tried:
[Code]....
How To Check If A Record Exists
Jul 26, 2010I tried to illustrate the problem by providing the following instructions, unfortunately the data was deleted and the example failed. It is now working. I have been working through one of Scott Mitchells ASP.NET Application Tutorials Title "Using TemplateFields in the GridView Control"
The URL is ...
The example demonstrates a temporary field being used in different ways, one of which involves dates in a Calender. If the HireDate in the example is deleted or not available the program fails. Providing the date is a valid date it works fine....
MVC :: Check If Record Exists Before Insert In 2.0 Using Ajax
Jan 11, 2011I want to check if the record is already exists before insert using Ajax ActionLink in Create View. I am getting error 'Object reference not set to an instance of an object.' Here is a code in View :
<div class="editor-label">
<%= Html.LabelFor(model => model.PolicyId) %>
</div>
<div class="editor-field">
<%= Html.TextBoxFor(model => model.PolicyId) %>
<%= Html.ValidationMessageFor(model => model.PolicyId) %>
<em>can not be changed later.</em>
//error occurs here
<%= Ajax.ActionLink("Check", "CheckIfExists", "Life", new { PolicyId = Model.PolicyId }, null)%>
</div>
And Controller action :
public JavaScriptResult CheckIfExists(string PolicyId)
{
if (lifeRepository.IsExists(PolicyId))
return JavaScript("alert(' Already Exists');");
else
return JavaScript("alert(' Not Exists');");
}
How To Check A SQL Database Table To See If A Record Exists?
May 10, 2010I 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
myConnectionCheck.Open()
myCommandCheck.ExecuteNonQuery()
End Using
DataSource Controls :: How To Check If Record Exists
Jan 6, 2010Just have a problem, I want people to join a mailing list, I just have a textbox and button. When a user enter's their email address, the address and time are inserted into a database. However, if the same email is added again I would like for a message to appear saying the record already exists.
Can someone show me how to do this, here is my current code:
[Code]....
AJAX :: Check Whether A Particular Record Exists In Database Using JQuery
Aug 18, 2015I have a asp:Button and asp:Textbox on Default.aspx page
Code is as below:
<asp:Button ID="Button1" runat="server" Text="Save" Width="80px" CommandName="Update"
OnClientClick="EnableDdlCompany();saveButtonClick();" CommandArgument="Save" OnClick="btnSave_Click"/>
<asp:TextBox ID="txtBarcodeNumber" runat="server" MaxLength="11" Width="230px"
Text='<%# Bind("BarcodeNo") %>' Display="None"
OnTextChanged="TextChanged" AutoPostBack="true"></asp:TextBox>
On button click, I want to call a javascript code to check that If the entered BarCode Number in Textbox already exist in Database, then show an alert "Number already exist" else allow user to save and navigate to Default2.aspx
I can able to do the same checking on TextBox OnTextChanged event using c# code, as below:
protected void TextChanged(object sender, EventArgs e) {
TextBox txtbarcode = fvIPRForm.FindControl("txtbarcodenumber") as TextBox;
if (txtbarcode.Text.Length > 0 && txtbarcode.Text.Length < 11) {
string error = "The Barcode Number " + txtbarcode.Text + " is invalid, the barcode length must be 11 character.";
ScriptManager.RegisterStartupScript(this, typeof(string), "Successful", "alert('" + error + "');", true);
[Code] ....
Here, IPRRequest is the class/.dll file name and IsValidBarcodeTest is a function defined in the class file
But same checking I tried using the c# code on button's OnClick="btnSave_Click" event, but dont know why this event is not firing, I guess due to CommandArgument on button, but I am not sure.
That's why I want to achieve it using Javascript.
Web Forms :: Check If Record Exists In Table And Prompt User
May 27, 2010Using C#.NET and VWD 2008 Express
I'm looking for a hand with:
When inserting, i would like to check if the record exists in the table, then if it doesn't, insert it, else either redirecting to a different page, or showing a message box saying "Record already exists" ...
Data Controls :: Check (Validate) If Record Exists In GridView When Adding New Row?
May 7, 2015I would like to check if a particular value already exist in the database Gidview row. If the value already exist, tell the user that he has already entered the record and don't save. otherwise save the record. In my case I want to check the "Random number".
<asp:TextBox ID="txtRandomNumber" runat="server"></asp:TextBox>
Maybe it could be done with a foreach loop statement.
How To Check If A File Exists On An Ftp Server
Jan 4, 2010I'd like to use a simple switch to display one image or another but I need a way to find out if the image exists.
If FILEEXISTS("pathtojpg") Then
'Display jpg
Else
'Display "no_image_yet.jpg"
End If
SQL Server :: Check If Value Exists Before Inserting?
Oct 27, 2010I want to be able to check if a value exists before inserting a new record in the table. I am taking a nvchar value from a textbox and want to compare it to existing values in the table. My codebehind is:
[Code]....
It is also important to filter down by CompanyID which is held in a Profile table. So the value can be equal in records where the CompanyID does not equal the loggedin Profile.CompanyID. So a user with a CompanyID of 2 can have a value in the table for SubType as "laptop" but a user with CompanyID of 3 can still enter "laptop" if there is no match for "laptop" and companyId = 3.
Web Forms :: Show Error When Same Record Exists In SQL Server Database
Sep 24, 2012I 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?
SQL Server :: Check If UserName Exists Or Not In The Shortest Possible Time?
Dec 4, 2010I am developing a website in ASP.NET with SQL SERVER as backend.
I want to find the best(FASTEST) way by which I can find if USERNAME exists or not.
My application is taking a bit of time finding that out. Do I need to look into my TABLE structure,indexes.
Is there any replacement for the query
Select username from usermaster where username=@Username
SQL Server :: Check If Record Already Exist In Database
Jul 13, 2010Before 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? Insert Record If Record Not Exists
Aug 13, 2010This is my Table Structure..
View 2 RepliesSQL Server :: How To Check (true/false) If Every Single Entry In Table Exists In Other Table
Oct 15, 2010I have 2 tables:
- Salesmen with Pk.SalesmenID
- Appointments with Fk.SalesmenID and busy(bit)
How can I check if every salesmen has at least one appointment
Am I on the right way with statement below, though I got syntax problems
[Code]....
SQL Server :: Check If "username" Value In Form Already Exists In DB?
Aug 12, 2010I have aregistration form where the user enters, among other things, a username. The form must make sure that the username is not already taken before the user submits the info.
Here's my code so far in the .aspx.cs:
[Code]....
I'm not sure how to call this function from the .aspx part... .
[Code]....
ADO.NET :: How To Update Record If Exists Using SqlBulkCopy
Dec 23, 2010I am impoting data from CSV file to my sql server database.
I successfully get data into datatable and using the SqlBulkCopy method to import data into database.
It's working fine.
But i want that if record id is exists then update the record do not insert that record.
DataSource Controls :: Best Way To Find Out If Record Exists?
May 14, 2010best Way to find out if record exists?
[Code]....
DataSource Controls :: Veify If Record Exists?
Jul 12, 2010I am using Microsoft SQL database, C# and stored procedures. How would I check if record exists on the form or in SQL. I will design a from that has employee name, id and 3 other fields.
If record exists (I could for example test if EmployeeId exists, and then display a message saying that "record already exists". Should I do it in Stored procedure or in code?
Page Redirect On Page_Load IF Record Exists?
Nov 13, 2010I have an default.aspx page that I'm trying to have redirect the user to a different page depending on whether or not their deviceId is stored in the SQL Server database. It should direct the user to the login.aspx if the record for the user is found or to the newdevice.aspx page if there was no record found. I want this to occur on Page_Load but have not been able to figure it out so far.
View 3 RepliesCheck User Id Already Exists?
May 22, 2010i am building a project using C# Asp.Net in which i am registering users with a user id, now my question is that how to check that the user id is already exists in the user table or not when user trying to register, i am using sql server 2000?
View 3 RepliesCheck If Row With Particular Id Exists In Datatable?
Mar 20, 2011i have two datatable, while adding rows in second datatable, i want to first check whether the id in the second datatable matches as in the first datatable, if not only then it should be added in the second datatable, else it should display a message...
i dont have any Primary Key defined on any column, so the rows could be repeatative.
C# - Check User Id Already Exists?
May 22, 2010I am a beginner coder, i am building a project using C# Asp.Net in which i am registering users with a user id, now my question is that how to check that the user id is already exists in the user table or not when user trying to register, i am using sql server 2000?
View 4 Replies