Check If Query Result Is Empty
Oct 10, 2011
First time poster and new to ASP programming.I have a functional database to where i am trying to add new functionality.I'm trying to add the idea to check if a returned string is empty, if so get value from a backup table which holds historical information. Here is what i have got for the specific part:
[Code]...
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Mar 11, 2010
how to take a query that returns a single row of data and load that data into textbox controls.I know about ExecuteScalar but it is only good for a single column of data from the query.
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Oct 8, 2009
hi there,first of i know nothing at all and my goal is to make a app for xp to check a database and check/patch a iso and then to burn the result to dvd-dl, basically like a app called abgx360 checks the database then like xbox backup creator burns the game, i'd like to make a app to do both, i'm going to college next year in september to learn programing c+ andf a few other things, but thats a longtime away.
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Mar 16, 2010
I have the following code in my project:
rivate Sub Button1_Click_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim connectionString As String
[code].....
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Aug 22, 2010
I want to bind the following query result to datatable:
Dim query = From c in db.Customers _
Where c.Status = "Active" _
Select c.CId, c.FirstName, c.LastName, c.Email
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Oct 28, 2008
I'm trying to run a query and display the result in a listbox. I can do it for a datagridview but not for a listbox .
Code:
Private Sub frmNieuweActie_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
strSql = "SELECT Acties.Actieid, Acties.Actie " & _
"FROM(Acties) " & _
[code]....
I get the correct amount of items in my listbox but it displays "System.Data.DataRowView" as item .
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Oct 17, 2011
I am facing a problem displaying the result of my "select *" query on the form . Here is my code:
[code]...
But when I write this code and run my form I am not able to see any records present in my database tables being displayed on my form. I have inserted a DataGridView on my form . What changes should I do to my code ?
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Dec 11, 2011
I'm trying to fill combobox with my SQL query result.[code]...
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Aug 5, 2011
I am trying to fill a combobox using the results form a query to combine two fields (first and Last name). I cannot seam to get to the query through the table adapter. I can set the binding source and select one of the fields to fill the control but I cannot get to the query's.
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Dec 22, 2009
I have a sql query which is returning null value below is the section the iID is null.Once debugger reaches this it goes to exception as its result is NULL. How to control debugger from going to the exception.
[Code]...
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Apr 24, 2011
How do I assign the query result to a variable.I am using SQLlite. Below is the code for retrieving password from the User Table. I need to compare the given password and the given password.
Dim i As String
Dim p As String
i = txtUserID.Text
[code].....
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Feb 27, 2011
I would like to parse the result of entering a query at [URL] the problem is that I cant seem to the post data just right and cant properly open a webrequest to the site.
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Apr 18, 2010
I have added a query to my form using the sqlDataAdapter object and the wizard.Now I want to show the result of the query in a combox on my form.The combobox is not binded to a data source, but is going to be used for searching a record (but this is for later)
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Sep 30, 2010
I am new in vb.net 2008.I want to populate items of a combobox with a result of a query that may include join or not.
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Feb 15, 2012
I'm trying to show some concatenated data in a CheckedListBox so that users are able to select the data for use later on. Here is the code I am using currently:
Dim con As New MySqlConnection
Dim theQuery As New MySqlCommand
Dim theTables As New DataTable
[Code].....
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May 25, 2011
Is there a way to show the value retrieved by an SQL statement in a message box? In context, my SQL statement searches my database to find a customer record that matches the details entered into the text boxes on the form, and retrieves the CustomerID. Is there a way to show this CustomerID in a message box?
The SQL code is:
SELECT customerid
from customer
where cust_forename = @custforename and cust_surname = @custsurname and cust_house = @custhouse etc
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Aug 10, 2011
I have a stored procedure:
CREATE PROCEDURE [TestProc]
AS
BEGIN
select '1a', '1b'
select '2a', '2b', '2c'
select '3a', '3b'
END
If I execute the following query using SQL Management Studio,
[Code]...
How can I get the three result sets using SqlDataReader? Or even three SqlDataReader's? Or is it possible to get multiple result sets in just one query in VB.NET? Is DataSet my only option?
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Jun 13, 2011
I have two text box(Start Value and End Value), one datagridview and a search button SQL script= Select id, ContactName from Customers where id between 1 and 5 I want a scenario where when I enter the start value 1 and end value 5 and click the search button it will run the above query and display the result in the datagrid view.
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May 21, 2010
I'm looking to store the result of SQL count function in a variable, i've tried numerous ways but haven't managed to get it to work?
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May 17, 2012
I'm just wondering if it's possibe to get the results from a query and then assign the results to a variable. So I will run a query which will return the names of the tables stored in the database, then I want them to be stored in a variable. So it would be something along the lines of:
Dim strFrom AS String = "FROM "
strQuery = "SELECT * FROM information_schema.TABLES WHERE TABLE_SCHEMA = 'Database1'"
con.Open()
[Code]....
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Apr 28, 2011
I have the following code which returns a single row and column of an MS Access database. My goal is to put it into the Text property of a textbox. Can please someone explain me how to do it?
Dim cmd1 As New OleDbCommand("SELECT NOME From FORN_NIB Where NUMERO = ?", cn)
Dim P2 As New OleDbParameter
cmd1.Parameters.AddWithValue("P2", ComboBox1.Text)
Dim Reader1 As OleDbDataReader = cmd1.ExecuteReader()
Dim dt1 As New DataTable
dt1.Load(Reader1)
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Nov 24, 2009
I have a for xml raw select query that returns a xml string in server2005 and i would like to write that string to a file using vb.net.
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Nov 22, 2010
A really boring question, sorry, but I really don't know that yet ;) I've tryed always string.empty, but with a decimal, there is an error.
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Apr 20, 2010
How do I get Linq to ignore any parameters that are empty? So Lastname, Firstname, etc? If I have data in all parameters it works fine...
refinedresult = From x In theresult _
Where x.<thelastname>.Value.TestPhoneElement(LastName) And _
x.<thefirstname>.Value.TestPhoneElement(FirstName) And _
x.<id>.Value.TestPhoneElement(Id) And _
[code]....
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Nov 16, 2010
Here is the original xml file
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<setup>
<cap>33</cap>
</setup>
[Code]...
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Feb 15, 2010
why is this xml
<?xml version="1.0" encoding="utf-8"?>
<items>
<item id="77" cityID="EE12345" cityDatum="15.2.2010. 11:28:35" />
</items>
[Code]....
If you, as some can't replicate these results, here's a screenshot:
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Jan 19, 2010
I have this code in vb6 the result of this query is bond in flexgrid how can i do this in vb .net using data grid.
Dim SQL As String
Dim rs As ADODB.Recordset
'SQL = "SELECT PO_Header.OrderID, PO_Header.RefNo AS [PO Num], PO_Header.OrderDate AS [Order Date],Category.Description + ' ' + SubCategory.Description as Department, " & _
[CODE]...
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Apr 8, 2009
I would like to post the result of a query in a textbox. [Code] Suppose this is my table, then I would like to post the sum from aantal from in a textbox. For UserID 1 it would be 35, for UserID it would be 35, [Code] but how do I get the result in my textbox?
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Dec 5, 2009
I have a set off LINQ queries filtering original datatable (loaded from Excel file) according to user selections in Comboboxes. Then the result is joined with Arraylist to further filter the set. Arraylist is a simple string list from 1 to 5. [Code]
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Oct 24, 2011
I have an rdlc report with a TextBox that contains
=Parameters!ReportParameter1.Value
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