I am quite new to programming and I want to be able to check whether the user logged on to the system is in a table or not. I am not quite sure how to iterate through a table.
View 2 RepliesI have to compare an item value in two tables. these two tables are on different database(same server).
I have succesfully generated sql query to return both table values.
the query runs in sql server without any problem and gives the results.
The same query i used in vb.net doesnt gives any result ...
It is resulting with no rows.
Does the connection to multiple databases wont work from vb.net.
The following classes are used to get the result ...
SqlConnection
SqlCommand
SqlDataAdapter
SqlDataAdapter is showing with no records returned. The same query returns the results in sql server query window...
My query is i want to save record from an excel sheet to my Database Table.
But i dont want to insert the Excel sheet as a whole rather i want to insert the record in my database table Row wise.Inserting the records is not the only thing but my major issue is i want to check and compare the Primary Key column of my Table with the Column in my Excel.
Suppose Table1 is my Sql Database Table,and RegistrationNo is the Primary Key Column.Similarly there is also a column of Registration Number in my Excel Sheet.
Now before inserting each record the RegistrationNo column should be compared.If the a registrationNo in the excel sheet say RegistrationNo 112 is already present in the table then it should not Insert the record and if its not present then it should insert.
Also the other issue is the number of columns in my Database table are more than the number of columns in my excel Sheet.So the columns that are not present in the excel sheet should be set to NULL while inserting the record in the Table.
I have been requested to implement a login form into a friend's Visual Basic .NET application. He specifically requested that I should do this using LINQ to compare the input to a table in an Access database. I don't really know why he imposed these restrictions, but who am I to judge? However, the problem is I am not overly familiar with VB .NET, or LINQ.
View 1 Replies how can i manually iterate through an entire datatable record by record, but only moving to next record after clicking a button. am using vb 2008 express and below is the code i wrote: Private Sub STARTButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles STARTButton.Click
Dim RealName As String
Dim UserName As String
Dim PASSWORD As String
[code].....
I have one table here with a list of UserIDs, Users, and ClientCodes. Each user can be assigned a client code to view that client's data elsewhere. Right now I have to change it for everyone via SQL Server and actually going into the table manually, but I'm trying to make a simple little program that will let the user change it themselves. All I need is a textbox that pulls the user based on a certain UserID from the table, and a drop down list that will not only show the current ClientCode they're set to, but allow me to change it and save that change to the table in the database.
What's the best way to go about this? I tried using the wizards but I guess that's not the best way to go about it. I have it displaying the correct user and their current ClientCode but that's about it.
I've got a table in an SQL server that often has large amounts of data imported into it via an automated process - the problem is that a lot of the data that gets imported is a duplicate of data that is already in there (for example if we have a customer in there called Mr Customer Ltd, a duplicate with a slightly different name could get imported, like Mr.Customer Ltd).
So I am using the Fuzzy Logic class that Wild Bill put in the CodeBank to find names that are similar and then highlight these items. The thing is that the target table that the imported data ends up in has several thousand rows and the table that contains the data to be imported often contains several thousand rows as well, so I'm trying to decide how to do this. Obviously reading both tables into memory is not an option as it will consume too much memory on the client PC that is running this app. So this is what I am doing at the moment:
1. Read the table that contains data to be imported into a DataTable in memory
2. Open a connection to the target table and use the SQLDataReader to start to loop through it
3. In this loop, for each row that the data reader reads I then loop through the entire set of rows in the DataTable and run this fuzzy logic method that compares the account name from the current row in the datatable loop to the account name in the row that the datareader is currently on.(there is also a Thread.Sleep(1) after each row is processed to prevent the process from eating up 100% of the CPU while it runs)
I'm about to pull my hair out on this guys I do not know where I'm going wrong but basically I receive a web request response formatted in XML and I need to insert that data into an SQLCE database. I have tried using LINQ queries but there are no matching ID fields to Join or Group.
View 3 RepliesI am doing a small program in vb2005 with access database. In that I have a small issue, my database has 3 tables tblbill having vendorid & truckid to compare, tblvendor has vendorid & vendorname, tbltruck has truckid & truckno in these 3 tables i want to retrieve and show the vendorname based on the truckid based search. I have written code for some level and it doesn't work for me.
This is my code
Dim cmd1 As OleDb.OleDbCommand
cmd1 = New OleDb.OleDbCommand("Select tblVendor.VendorName, tblTruck.TruckID, tblbill.vendorid, tblbill.truckid " & _
[CODE]...
I need comparing value from the same table for my final project.
Example :
Table 1 :
SubjectCodeClasses
Sub Aclass 1
Sub Aclass 2
Sub Aclass 3
Sub Bclass 2
Sub Bclass 3
Sub Bclass 4
Sub Bclass 5
Sub Cclass 6
Sub Cclass 7
Sub Cclass 8
...
My task is, I need to compare the classes in the subject. Sub A with class 1, class 2, class 3 have to compare with Sub B and Sub C. if classes from Sub A exist in Sub B then the output is 0, if not the output is 1. then Sub A again will compare with Sub C and the rest. After Sub A compare its value with other subject. Sub B will start comparing with all the subject and so on.
Below is the concept.
Sub ASub BSub C
Sub A001
Sub B000
Sub C100
I really don't know to do the loop..
[Code] my issue is that now i need two cases, first i need a query that will return the date created and modified of the table and i also need to know if its possible to query a list of table names in the database ordered by date created but that have a certain thing in their names. for example the database contains the following tables: [Code] and what i need the query to return is the tables that contain "Data", settings and employees are for the other functions of the program. so the query should return the 4 data tables in order of date created. but i have no idea how to go about doing that in the query, does anyone know how this is done?
View 6 RepliesUsing VB.Net and SQL Server
I want to compare the textbox value with table row value by using if condition
Code
If textbox1.text = cmd
cmd = New SqlCommand("Select name from table1", con) Then
cmd.ExecuteNonQuery()
cmd = SqlCommand
The above code is showing error in if condition. I don't know how to compare the textbox value with table row value by using if condition.
In myapp, I can create two datasets: [dstServer1] and [dstServer2]. They are coming from two tables which are in two different SQL server: [Order1] (in server1) and [Order2] (in server2). These two tables have the same data structure. How to code to compare two dataset and then insert difference into another table without using linked server?
View 4 Repliesi am working on a web site. i need to validate a text box value with a Column ( in table A, using sql server) .
well, the situation is. When user enter in textbox1 = 45 , before user go to textbox2 , textbox1 check in database if 45 is there. If not give error .
My application is in VS2008 coded in vb.net.I have a table with three columns FromDate,Todate and Schedule.FromDate and ToDate will have date values whereas Schedule will have a any of these values(weekly,Monthly,Yearly) In my Form i have given some provision to the user to check the records.
My requirement is The currentdate that is Today's date should be compared with the values of Fromdate and ToDate.First it should be check whether Schedule value is Weekly or Monthly or Yearly.If it is weekly than it should check the record in between fromDate to ToDate with a increment of one week.That means it should first check the first value of fromDate than add 7 days to the value and then again check from fromDate and this should continue till it reaches Todate.
[Code]...
i need to compare two different tables which are Enlistment and Schedulings Table . in schedulings Table , there was a columnnmae AvailableSlots wherein the AvailableSlots in every sections in every year is recorded.. in Enlistment table, i used to count the number of records that satisfy my query : "Select Count(*) as Total from Enlistment where YearLevels = '" & TextBox4.Text & "' AND Sections = '" & ComboBox1.Text & "'"Now, i need to know how many slots are taken that satisfies the query.. to know the number of students that can only be enrolled on that particular sections ..
here's my codes :
con = New OleDbConnection("Provider= Microsoft.ACE.oledb.12.0; Data Source=|DataDirectory|Enrollment System.accdb;Jet OLEDB:Database Password=jhedonghae;")
Dim ewaaa As String = "Select Count(*) as Total from Enlistment where YearLevels = '" & TextBox4.Text & "' AND Sections = '" & ComboBox1.Text & "'"
[code]....
My application is in VS2008 coded in vb.net.I have a table with three columns.FromDate,Todate and Schedule.FromDate and ToDate will have date values whereas Schedule will have a any of these values(weekly,Monthly,Yearly)
In my Form i have given some provision to the user to check the records.My requirement is The currentdate that is Today's date should be compared with the values of Fromdate and ToDate.First it should be check whether Schedule value is Weekly or Monthly or Yearly.If it is weekly than it should check the record in between fromDate to ToDate with a increment of one week.That means it should first check the first value of fromDate than add 7 days to the value and then again check from fromDate and this should continue till it reaches Todate.
[Code]...
how to compare 2 sql tables and show data that are in table 1 but not in table2?
Dim strSQLL As String = "Select t1.run from ML533 t1 left join portal t2 on t1.[run] = t2.[runNo] where t1.[run] <> t2.[runNo]"
Dim comm As New System.Data.SqlClient.SqlCommand(strSQLL, conn)
Dim ds1 As DataSet = New DataSet()
[code]....
i have tried google and other sites.. but still cannot find solution. maybe i post the wrong question. but i manage to do this code. but its only shows only 1 record missing, but its supposed to show 5 records that r missing.
i want to compare the two data table columns and find duplicates for example
dataTable1
autoid ponbr polinenbr quantity
1 0001 10 5
2 0002 12 6
[code]....
in the above two dataTable i would like to compare the ponbr and polinenbr column and find the duplicates and get the autoid..
I am having a remote server it has INVENTORY DATABSE , and also iam having same databse in my local system. I want to populate by local database table with my Remote database table through Vb.net code by click a button. How to do this .
View 1 RepliesI want to add a new table in my accdb and copy the content tfrom an existing table into the new one.
Is there an easy way to do this?
I would like to know how to filter out system tables and only return user tables .when i run the code it displays lists of system tables with user tables list in combobox.I have just gotten into vb.net and have tried few ways to do this but dont understand well enough.
[Code]....
I try to make a WFA for filling, reading etc. to a database. I want to compare 2 dates (actually 1 date is changed by 42 days) that are chosen by a user through a datetimepicker. After comparing the 2 dates the "newest" date has to show up in a non editable textbox. This Is my code (of course I have 2 subs for the datetimepickers as well).
Private Sub AwbdatumTextBox_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles AwbdatumTextBox.TextChanged
Dim DatumbinnenkomstDateTimePicker As DateTime
[code]....
i want to create an system that can trigger alert which, the alert box will change to a red color depending on its value.
my problem is, the value that i used to compare is dynamic and based on what user key in in the paramater table while the data that will be display the alert is from the alert table.
lets say the value in the parameter table is been declare as Aand the value that display the alert is been declare as cellvalue.
this is the code that i have been tryingif cellvalue < A then' some code to change the box colorEnd if
but i kept failing. the system cannot read the A value.
I'm a little brain dead at the moment and was wondering if someone could help me out with some code.I am pretty new to using databases in vb and what I want to do is to match a variable with a value in a database field and when it finds it, it will store the row count into another variable. I know I have to use a counting loop, I'm not sure how to compare the variable to the value in the database.[code]
View 3 Repliesi want to create an system that can trigger alert which, the alert box will change to a red color depending on its value.my problem is, the value that i used to compare is dynamic and based on what user key in in the paramater table while the data that will be display the alert is from the alert table.
lets say the value in the parameter table is been declare as A and the value that display the alert is been declare as cellvalue. this is the code that i have been trying if cellvalue < A then some code to change the box color End if but i kept failing. the system cannot read the A value.
I have a connection string set up and a data reader.I have two textboxes on my form for users to type in. One textbox (txtLogin) is a user name and the other textbox is a password (txtPwd). I'm trying to compare what a user types into those two boxes to a table in a vfp database. The table I'm trying to compare to is open about 99% of the time so I need to be able to read from it in some type of "shared" mode.
My Select statement needs to be something similar to "select * from sites where clogin = txtLogin.text and cpassword = txtPwd.text"I just don't know how to get this to work properly.
i want to compare between the cell value with the value(parameter)in database.
as example, if my cellvalue value is 3 and my paramater(a) in my database is 5 it will be like this if cellvalue<a then (some code)end if
the problem is i don't know the exact data type. the reason i need to use data type is because my data is dynamic.
here is my code:
Code:
protected SubGridView1_RowDataBound(ByVal Sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowDataBound
con = New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;
[Code]....
I have a tblVersion that contains the versions of my application:
VersionID Version
VersionID is a bigint primary key, version is a ntext column that holds the current version... I want to be able to pick the row that has the highest version number, but version could be in this format:
MyApplication 1.0.1
If I try to convert that to a int32 it will throw an exception obviously. I would like to know if some of you have a idea how to solve this issue. I could of course make sure the column will only contain numeric values but this gives a little more flexibility.
I m writing a Auto Sms Sending application which will work in the background. I m using VB2010 and Sql 2008 This application will check SMS table every 5 seconds to check new records if it finds a new record it will sent three sms at an interval of 6 hours.The problem is I don't know How to Extract Value of a 'Time' Column and Compare it with system time.i simply want to Compare value of 'Time' column and system Time if Time Deference >= 6 hours the application will sent SMS
View 5 Replies