Retrieve DataType From SQL Table
Oct 29, 2009
I would like to retrieve the datatype of a specific element from a SQL table. The situation is that I am importing data from a source that does not match column-to-column with my SQL table. The objective is to compare the datatype from my source file to what it MUST be when I write it to my SQL table, and throw an error on a mismatch. I would like to do this without creating a class that contains the layout of my target table if possible.
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Mar 25, 2011
How can I save a date data type from vb.net to access that access have date/time in its data type and how can I retrieve it? I also want to use datediff to auto calculate the age to be shown in a textbox.
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Dec 1, 2008
I am using Autonumber datatype for the very first time when inserting anything to the table it does not give any problem but when i am trying to retrive data using the Autonumber field i get the following errorSystem.Data.OleDb.OleDbException was unhandled Error Code=- 21472 17913 Message= "Data type mismatch in criteria expression." Source="Microsoft Office Access Database Engine"below is the code that i have used. [code]
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May 6, 2012
Dim cDT as date
strSQL = "Insert Into computetb (period_id, date, staffer_no, day_type, restday, rate_hr, regular_hr, ot_hr, night_diff, basic_pay, ot_pay, nd_pay) Values (" & gPeriodID & ",#" & cDT & "#," & cID & ",'" & cTYP & "'," & cREST & "," & cRATE & "," & cREG & "," & cOT & "," & cND & "," & bp & "," & ot & "," & nd & ")"
dbs.Execute (strSQL)
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May 13, 2011
what are the changes I need to for my DAL to support this.
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Aug 12, 2011
Following is the code which gets xml data from web service and then dataset reads using ReadXml method. This Xml has ID and MyDate tags for each table row (so table(0) will have ID and MyDate columns) and this Xml data does not have schema associated with it. When page is loaded first time, it sorts by ID in asc order. It was working until ID was 999. When next ID came as 1000, even in ID asc, 1000 is showing before 999 in datagrid.
I wanted to confirm that when dataset is loaded using ReadXml, all the columns in its table are treated as string even they are numbers or dates and that's why in ID asc order 1000 is coming before 999.
Also, MyDate tag has date in format "01/31/2011" (mm/dd/yyyy) and it seems that sorting is wroking fine for date. Would sorting by date always work even when dataset table MyDate column is of type string (assuming that my above statement is correct)? Are my two above assumptions correct?
stream = New System.IO.StringReader(XML data returned from web service)
With dataset
.ReadXml(stream)
dvView = .Tables(0).DefaultView
[code]...
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Nov 3, 2010
I pull a report from SQL Server being not a fan of cursors I process that table server side in my code behind file. So I pull this report that is an address label report and my client wants there to be X number of labels per person. So I coded this function:
Private Function ProcessX(ByVal dt As DataTable, ByVal X As Integer) As DataTable
Dim dtProcessed As DataTable = dt.Copy
dtProcessed.Clear()
[code].....
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Mar 8, 2010
anything wrong with using datatype object and determine datatype in class property? I have a typed dataset and it has several integers columns that are null in the db. and when I make a call it throws exception.is there anythign wrong with setting it as object in my dataset.. changing the throw exception property to Nothing and passing it to my property as integer?
for each row in myDS.DataTable
cRate.CustID = row.CustID
next row
and in my class
Public Property CustID() As Integer
Get
Return _custID[code].............
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Apr 30, 2002
I'm using a 3rd party chart COM object (National Instruments CW graph) to plot data versus elapsed time.The x value needs to be a VB6 equivalent Date type which is a .NET DateTime datatype.What I need is a way to convert a TimeSpan datatype to a DateTime datatype.
Dim testTime as System.DateTime 'date
Dim plotTime as System.DateTime 'date
Dim elapsedTime as System.TimeSpan[code].....
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Jan 15, 2012
I have a database in mysql. The column in table is of datatype time(0)
Similarly I have a control datetimepicker in vb.net I have assigned format property as custom to the control and the CustomFormat property as HH:mm:ss tt so that it can just provide the time. I dont want the date to be in it.
Issue comes when I try to retrieve the value from database I get an error as Converion of type 'Timespan' to type 'Date' is not valid
Try
Dim myCommand As SqlCommand
myCommand = New SqlCommand("select * from [HMS].[dbo].[DoctorSchedule] where DoctorID='" & txtDoctorID.Text & "'", Connection)
[Code].....
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May 2, 2012
I have column with bit datatype in sql server table(2008).while returing to text box its returning true in text box instead of 1.i tried converting it from true to 1 using txtboolvalue.text=Math.abs(CINT(ReturnList.Item(34)).tostring. But it doesnt convert true to 1
Secondly: im checking for columns in datatable if there are any nulls. its checking for nulls in the sqlserver table but its returning true if there is a null.i just want it to return NULL is there is null i textbox..
CODE:
Then
CODE:
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Jan 2, 2011
I am working on a produce inventory database in my VB Express program.I have a form on the bottom and a spreadsheet at the top. I want to enter all the data in the form and have that data automatically transferred as a group to the spreadshet in the upper part of the page when I press a button.I know that there's an insert function.I set it up correctly. The problem is that I have to convert the textbox, which contain string data, to the datatype used in the database spreadsheet.HOw do I use CAST or do this?Here's the function I am using:
Me.TableAdapterManager.InventoryTableAdapter.Insert(IDTextBox.Text, fruitName, unitprice, unitsize, unitIn, unitTransit, unitOut)
Evernything is a string cause the data is coming from a textbox, I need to convert it to the datatypes used in the database.Also how do I use the CAST and Convert functions
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Jun 18, 2012
I am using vs2005 with access database.Developing a new application. I am the new one to the application development.This is what my situation which takes my time towards searching a reference but no where it is found:There is 2 tables named tblbill(contains VendorID & TruckID) and tblvendor (contains VendorID & VendorName) Where my user wants to display the vendorname against what he selected the TruckID..I know how to catch the VendorID in selection of the TruckID..But doesn't know how to retrieve the Vendorname based on the vendorID.
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May 31, 2012
I 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]...
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Feb 2, 2009
I want to retrieve a value from a field of a table. How can I assign this value in the text of a tooltip. The tooltip will appear when the user will move the mouse on a textbox.
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Jul 6, 2009
I am developing an dictionary application suppose I am selecting a word from the combo box and I wished to show the meaning of the corresponding word in the multilined textbox.
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Jan 11, 2012
I have two tables Table I contains the data of trainees stdt (number and name and other information about) Att second table contains the attendance date and trainees id and the trainee attend case is it present or absentAt the beginning of each day is supposed to be when I run the program retrieves the names of numbers of trainees from a table of trainees from the first table and the the std attcase from second table and puts them in the datagridview My question is how this programmatically can be doneTried to use a left join but did not workwhat i want is show all row from std table and creat blank rows for att table to fill them or retrive att row for today if it existselect * from stdt left join (SELECT * from [att] where attdate =#12/9/2011# ) ON stdt.stdid =att.stdtid
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Nov 15, 2011
ClassificationCode = dsClassification.Tables(0).Rows.Count + 1
Here's my code above. What I wanted to do is to retrieve the last row of the table to increment the number column.
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Apr 27, 2010
Here is my problem:I have 2 tables Accounts and Transaction Logs.in Accounts table, it has column "Amount" which is a base amount of an account.and in Trans Logs table, it also has column "Amount" which is additional (add or minus to the base amount) amount of the account.and I don't know how to retrieve that base amount to edit it, then save it back to the table.That means I need to get a value of the right column by using Acc_No to find. I'm using DataSet, by the way.i think it should go like this:
Dim Amount as Decimal
Amount = *the code to retrieve the base amount*
Amount = Amount + txtAmount.Text
*the code to save the new amount back to Accounts table*
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Apr 1, 2009
Is it possible to have a quick and easy way of retrieving the last 10 records from a table?
Currently what I have been doing is retrieving all the records then one-by-one cylcing through each record until I have the last 10. To me this seems to have a lot of over-head reading each record. I just wondered if there was a quicker way of doing it.
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Sep 25, 2011
I developing an invoice page where user will select Product from a combo box (approx. 500 + item). I am loading product Name, Product ID, sales price in a session Table. After selecting the product, a textbox value will Sales Price. But it is taking so much time.
[Code]...
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Jun 22, 2009
Like we can retreive all the records from a table using this method:
While (Not rst.EOF)
....
End While
How to retrieve all the records when using OleDbConnection?
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Jun 10, 2011
How can I retrieve info from a HTML table like this :
[Code]...
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Mar 16, 2012
Using the following code, a user inputs a date into a textbox control and then clicks a button. A new record is created in table [rms_Report] and then I retrieve the ID of the record that was just added. I pass this ID onto page "CreateReport.aspx" via a response.redirect and query string.
I need to retrieve the UserId of the currently logged in user and insert it into table [rms_Report]. I need this to occur after the new record is inserted, but obviously before the response.redirect. I know how to retrieve the UserId, but I'm not sure how to incorporate into the other code.
ASPX
<asp:SqlDataSource ID="ReportDataSource" runat="server"
OnInserted="ReportDataSource_Inserted"
ConflictDetection="CompareAllValues"
[Code].....
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Aug 25, 2010
I have a page where I would like to collect information about x number of users.I have a control where you enter in the number of users and based off of that number, I create a dynamic table with a row for each user.Each table row has textbox controls that I would like to retrieve the value from on postback.How can this be accomplished?
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Aug 5, 2009
I am using oracle and trying to create a datagridview but when i try to create the dataset i get the error "could not retrieve schema information for table or view" stating my database and table name. I am using the Oracle client not the OLEDB as i have always used that and had no problems. I am using Oracle 11g.
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Nov 19, 2011
I have 3 table which are Timetable, Schedule and Consultation slot and I wish to combine them so that all the data are able to retrieve easily.
Timetable are having
1. TimetableID
2. Lecture ID
3. ClassVenue
4. ClassStartTime
5. ClassEndTime
Schedule
1. ScheduleID
2. LectureID
3. ScheduleVenue
4. ScheduleStartTime
5. ScheduleEndTime
Consultation Slot
1. ConsultationID
2. LectureID
3. StudentID
4. ScheduleID
5. remark
Here is my code in metadata
Partial Public Class CombinationOfTSC
<Key()> _
Public Property LectureID() As String
Get
Return m_LectureID
[Code] .....
I'm having error at c.LectureID = s.LectureID = t.LectureID
I wish to get the combination of 3 tables through the lectureID since there are lecture ID on 3 tables.
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May 24, 2011
I am trying to Query a table with data from another table and return a filtered result
Dim i As Integer = 0
For Each lrow In dtlist.Rows()
Dim lat As Double = dtlist.Rows(i)("Latitude") 'CDbl(Me.SubjLat_txt.Text)
Dim lon As Double = dtlist.Rows(i)("Longitude") 'CDbl(Me.SubjLon_txt.Text)
[code]....
Obviously doesnt work but the idea is thats the Value i need to put in the Value Column of dtlist In short the project, loops through one table(dtlist) of address's and gets the distances of it from the address's in the second table(dtsold) then gets the higest value from dtsold within a certain distance?
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May 9, 2009
I am using visual basic 2008 and sql server 2008. I am trying to retrieve data from a table in sql server 2008. I am using the following code
Dim cn As ADODB.Connection
cn = New ADODB.Connection()
Dim rs As ADODB.Recordset
rs = New ADODB.Recordset
Dim cnstr As String
[Code]...
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Feb 26, 2009
how to retrieve data's from MS Access table using datagridview?
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