Access :: Check If The Particular Field Data Exist?

Mar 18, 2011

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

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Similar Messages:

Access :: C# - How To Check Image Field Is Null Or Not

Mar 28, 2011

Actually i have a table with 7 columns

1) Title varchar(100)

2)Description varchar(300)

3)ProfilePicture varbinary(max)

4) Image1 varbinary (max)

5)Image2 varbinary(max)

6)Image3 varbinary(max)

7)Image4 varbinary(max)

Image1,2,3,4 are not a mandatory fields so, when i inserted, i check it if it is not there then i insert null value, Now problem is when i retrive them if there is a row contain image1,2 are image content and 3,4 are null values dataset also filling as it is in database but when i checking like

[code]....

it shows error like

Unable to cast object of type 'System.DBNull' to type 'System.Byte[]'.

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Forms Data Controls :: Update A Date Field When Check Box Check In Detailsview

Jul 15, 2010

I have a detailsview with an update button one of the update fields is a checkbox which when is checked I want to automatically update a date field of when the checkbox was checked, am I going the right way with this code....... as I am getting a number of errors

Dim i As Integer
For i = 0 To detailsview2.Rows.Count - 1 Step i + 1
Dim row As GridViewRow = GridView1.Rows(i) [code]....

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

Feb 5, 2010

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

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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Data Controls :: How To Check Username Exist In Database Without Postback

May 7, 2015

How to check username is exist in database or not without postback the page...

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

Apr 19, 2010

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 3, 2010

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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Data Controls :: Check If Data Exist In List Generic Collection Using C#

Apr 19, 2014

i want to check my collection so i can add a new customer as long as the username does not exist in the collection i do not want 2 customers to be able to have the same username.

i have been trying many different things to try to get this to work but i am not exactly sure what i should be doing I have a aspforum and collection C# class of the list.

here is some things that i have tried

CustomerExists()      i also have a collection of List<Customers>
 //HERE IS MY EXISTS METHOD
public static Boolean IfCustomerExists(string login) {
List<Customer> theGuy = Collections.Customers;
bool exist = false;
foreach (Customer customer in theGuy)

[Code]....

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Data Controls :: How To Check And Update Exist Data In SQL

Jan 3, 2014

As following code condition statement show that  transfer data from Location A to Location B. May i know how if to update the exist data in Location B ?.Example,from  Location A Qty is 10 , transfer Qty to  Location B is 5, then Location A is 5. So,How if transfer  again from location A qty 2 to Location B. then update the location b qty.

USE [CIMProRPT01]
GO
/****** Object: StoredProcedure [dbo].[MMSLocTrans_InsertOrUpdate] Script Date: 01/03/2014 13:46:14 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO

[code]....

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Check Whether The Record Exist Or Not

Mar 16, 2010

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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Access :: Data Type Mismatch While Inserting Into A Number Field In An Access Database Using A Parameterized Query?

Jun 9, 2010

I have a data type mismatch while inserting into a number field in an access database using a parameterized query.I think this should be pretty simple but I am still learning a lot.

[Code]....

I have some commented out as I am working one field at a time. The working fields are textboxes and the non working ones are dropdown lists. But I think it may be the field that the list is drawing from? Not sure.

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

Dec 15, 2010

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

public
static
bool IsDomain()
{
Uri s =
HttpContext.Current.Request.Url;
return
true;
}
webconfig:
<
add
key="DomainName"
value=http://test-domain></add>

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Web Forms :: Check If Parameter Exist?

Mar 25, 2011

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 5, 2010

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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Making Checkboxes Check If They Exist In A Table?

Jan 21, 2010

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

Associated_Product_Types

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

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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SQL Server :: Check If Record Already Exist In Database

Jul 13, 2010

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

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Javascript - Check If A File Exist In The Server?

Feb 15, 2010

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

Page.ClientScript.RegisterClientScriptInclude("myfile",jSFile);

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

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Forms Data Controls :: GridView And Editing Data - Check For Correct Data In Each Field

Apr 7, 2010

I have loaded up a gridview object with data. I have turned on Edit on the grid. It lets me edit the data, but I also want to put some code to check for correct data in each field. I tried to assign a requiredfieldvalitor, comparevaliditor but they don't work. Is there an event I can capture to fire up some code before the grid sves my data?

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Iis6 - Application Lifecycle - How To Check Configuration Properties Exist

Feb 22, 2011

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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Error - Field Does Not Exist In The Current Context

Nov 8, 2010

I am getting a very strange error. i have declared a field send_outlook_appt. Even though intellisync is picking up the field name, I am getting an error saying that it does not exist in current context. My program runs as expected in dev. When I try to build/publish my website, that's when I get the error. Here is a snippet from my code.

public class arcTraining
{
private string connstring = ConfigurationManager.ConnectionStrings["xxxx"].ToString();
protected int _training_id;
public int training_id
{
get { return _training_id; }
set { _training_id = value; }

[Code]....

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Data Controls :: How To Check If XML Element Name Is Equal To Database Field Name

Nov 25, 2013

I have to check if XML Element name is equal to db table column name in c#.net

Iam using data access layer for sql commands.

Ex,

 if XML Element name is Userid the same name must be exist in the db table column name(Uerid)

if the column does not exist in the table the value should not be stored.

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Data Controls :: Changing Gridview Field By Clicking A Check Button

Oct 19, 2012

changing gridview field by clicking a check button in gridview 

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

Jan 12, 2010

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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