Right now me filling a combobox by this way.
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By this way combobox CmbId is storing above sql query ouput. But now i want to get above query ("Select Name from StudentDetails where Id=10 ") result to store in a variable string. How can i do this ?
I need to pass a string variable into a wql query:
Dim booking As String = System.Configuration.ConfigurationManager.AppSettings("PlayersFile")
Dim query1 As New WqlEventQuery( _
[Code]......
However, I'm uncertain how to make the variable booking parsable by the query.
This is probably so simple however my brain has decided it wants a night off. I am trying to write a program that uses SQL queries for various tasks but I need it to allow the user to be able to use which ever name they want for the database name. therefore I need to be able to reference the database as a string variable. For Eg:
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Ok I'm creating a sql query with a string variable and executing it in vb. The string would look something like: Insert Into Table (vara,varb,varc) Values ('vara','varb','varc') This works fine.
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I am getting the error:"Range variable 'sender' hides a variable in an enclosing block or a range variable previously defined in the query expression."for this
Imports System.Data.SqlClient
Imports System.Linq
Public Class Form1
[code]....
I can select any other item from the table without the error. "sender" has the same properties as "receiver" in the SQL table.
I am trying to run a query an Access db from VB. The general query which I want to run is
SELECT * FROM Patient WHERE Patient.PatientID = ?
or SELECT * FROM Patient WHERE Patient.PatientLname = ?
I tried using an input box which captured the user input and pass that variable to the query, but that failed. Then I read about writing a function and using that, however, I keep getting an error which says Function not defined, but when stepping through the code, it seems to work. Here is my function: [Code]
I'm looking for a way to search a string variable for two words and copy the text in between them into another variable. This needs to be done as many times as the match occurs.
View 3 RepliesIn one function I have the variable: dim StrProjectNumber = UCase("23-EXP-16284")
However in another form I want to use that same variable in a SQL query, and when I try it says the variable is not declared. Do I have to make a global variable or is there a way around it? If so, how would I go about declaring a global variable?
Say I have something like this
Dim Level1 as Integer = 83
Dim Goal as String
Goal = InputBox(" What level is your goal?")
[code].....
I'm trying to get some data from an access database and show them in a CheckedListBox The sql quary includes a variable('sport') and it's values is passed by the user when I run the following code an exception is thrown at the line adStudentList.Fill(dsStudentList, "Register") and it says 'no value given for one or more required parameters'
Dim adStudentList As OleDbDataAdapter
Dim dsStudentList As New DataSet
Dim sport As String
sport = cmbSportList.SelectedItem
[code].....
I am trying to insert a string variable inside of two strings, and make a combined string. Public Sub Page_Load() Dim Id As String Id = Trim (Request.QueryString("Id")) End Sub Dim mp3text as string url... & Id & ".mp3" My goal is to make the mp3text variable have a string that is: url...(If Id is 7) It is for some reason not connecting up correctly. I checked what string it is outputting and this is what it is giving: url...It is missing the Id content.
View 12 RepliesI am trying to get the value of a Query and save it to a variable, The only way i have been successful is through creating a loop and then saving the value of the location...
Below is the
Dim DBConn As OleDbConnection
Dim DBCommand As OleDbDataAdapter
Dim DSPageData As New DataSet
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I have remplace the keyarr definition by my SQL query: With the code above, I can print both keyarr in a console. What should I change in the _sqlReader.Read() function in order to get keyarr definition like the first code. I would like that keyarr could be
interpreted by the rest of my code.
I have 2 public variables that I declared in form1 of an application. I am trying to call that variable in form2 and then pass that variable in a sql query. [code]...
View 2 RepliesI want to declare a variable to hold the query result from LINQ to SQL like to the following:
Dim query As IQueryable(Of Student)
If isNoUserName Then
query = From st In db.Students _
Order By st.AssignedId Ascending _
[code]....
Return query
Error : conversions from 'System.Linq.IQueryable(Of )' to 'System.Linq.IQueryable(Of Student)'.
How do I declare variable "query" to hold both data from "Student" and "User" tables?
regarding this error: 'sqlquery' is a variable but is used like a method.Near the bold code is it gives the above error.
string[] sqlQuery = new
string[10];
for (int i = 0; i <= sqlQuery.Length - 1; i++)
{
char[] splitterequal = {
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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].....
I have a public variable that I declared in form1 of an application. I am trying to call that variable in form2 and then pass that variable in a sql query.
If I declare
Public Class Form1
Public payPeriodStartDate, payPeriodEndDate As Date
How then to I declare that variable in form2 and how to I pass it to my sql query
SELECT [Exceptions].Employeenumber,[Exceptions].exceptiondate, [Exceptions].starttime, [exceptions].endtime, [Exceptions].code, datediff(minute, starttime, endtime) as duration INTO ScratchPad2[code].....
I have 2 public variables that I declared in form1 of an application. I am trying to call that variable in form2 and then pass that variable in a sql query. [code]...
View 14 RepliesI have a public variable that I declared in form1 of an application. I am trying to call that variable in form2 and then pass that variable in a sql query. If I declare:
Public Class Form1
Public payPeriodStartDate, payPeriodEndDate As Date
How then to I declare that variable in form2 and how to I pass it to my sql query.
Here is the code I have for form1: [Code]
and when I debug this form, no data will appear. I'm sure that it's something wrong with how I'm either calling the variable in form2 or in the query. Can anyone offer any assistance on this?
Do you just need to format the date? Such as msgbox(New Date(2010, 1, 1).ToString("yyyy-MM"))
Or do you need a hashtable:
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I am using VS 2010, SQL 2008 express and doing windows applicaion programming in vb.net.I want to write a select query(or Stored Procedure) such that the conditions mentioned under WHERE clause can be variable .like :Select * from TABLE where F1 = var1 and F2 = var2 and F3 = var3.Now on the basis of some conditons the equations in where clause should beused.Say condition is variable value >6.Now in this case ,if
var1 =7 var2 =3 var3 = 8 then the query shud behave like
:
select * from TABLE where F1 = var1 and F3 = var3
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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?
View 3 RepliesI'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()
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I want to query items from countries that are selected from a treeview (with checkboxes). However the number of countries that is selected by the user is not known beforehand. So how can I make a proper query when the number of OR operators is unknown? For example: SELECT DISTINCT Item FROM Countries WHERE Country LIKE @c1 OR @c2 OR @c3 etc� and then add the parameter values based on the selected countries in the treeview. I looked into parameter arrays but can�t make sense out of it really
View 13 RepliesMy goal is to make the content of TextBox1 to depend on the value chosen in ComboBox1. My code is as follows:
Imports System.Collections
Imports System.Data
Imports System.Data.OleDb
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i'm currently making an app that needs to run a query between two dates. this app will run automatically, so i need to put the dates as today and yesterday, essentially.
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The code below works for the class that I hard coded "XCCustomers" in my RetrieveIDandName method where I use CType. However, I would like to be able to pass in various classes and property names to get the integer and string LIST returned. For example, in my code below, I would like to also pass in "XCEmployees" to my RetrieveIDandName method. I feel so close... I was hoping someone knew how to use CType where I can pass in the class name as a string variable.
Note, all the other examples I have seen and tried fail because we are using Option Strict On which disallows late binding. That is why I need to use CType.I also studied the "Activator.CreateInstance" code examples to try to get the class reference instance by string name but I was unable to get CType to work with that.When I use obj.GetType.Name or obj.GetType.FullName in place of the "XCCustomers" in CType(obj, XCCustomers)(i)I get the error "Type 'obj.GetType.Name' is not defined" or "Type 'obj.GetType.FullName' is not defined"
'+++++++++++++++++++++++++++++++
Imports DataLaasXC.Business
Imports DataLaasXC.Utilities
[code]....
I'm using a datagridview to display data and make updates to my access database. I was able to display data from my database to the datagridview but it is not filtered. The datagridview displays all the records on my database. I tried using query builder to execute sql select statements that will filter the data and this is where I'm stuck. Im using a variable as a parameter to the sql statement and I dont know what syntax to use in Query Builder. I tried to use @varname, '" & varname & "', and
View 1 RepliesI am using VS2010 windows application , SQL server 2008 express at backend.I am designing a windows form with fields to search records in database.Say there are 3 fields in the form :
1) material no 2) material group 3)creation date the corressponding table in database with above fields is " Material_master" User can search materials in the database by entering any of the above fields.No I want to write a query where if user doesn't enter anything then my query should work like
"select * from materialmaster "
if only material no is enterd at screen then
"select * from materialmaster where MatNo = materialno "
if both date of creation and material no enterd then
" select * from materialmaster where MatNo = materialno and Date = creationdate "
In other words , field with no values in it should not be accounted in the where clause. Only one query I want to write.How we can achieve this in VB.net windows application?