Asp.net - Getting Table Field Names As A String?
Oct 28, 2011
I'm trying to get the list of field names for a given table, to turn them into a string which I can to post back as a variable to another function.I've Googled loads of stuff regarding GetSchemaTable but all I seem to be able to output are field parameters, but not the actual value of these parameters (ie ColumnName, which is the one I actually want!)
Found this page; What is the SQL command to return the field names of a table?But all the queries on there give me an error "You do not have access to Table 'Columns'"I feel sure this is pretty simple, can someone give me a little function that will simply give me fieldNames = "fieldName1, fieldName2, etc"I am using a MySQL server and ODBC connections ASP.NET using VB.
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Feb 25, 2012
I'm trying to produce a repeater showing amounts of money taken by various payment types into a table.Payment types available come from a global settings file as an array, I am creating a dataTable by looping this list and extracting sales reports (there might be a more efficient way than this loop, but this is not my concern at the minute).My question: How do I bind this to a repeater and display it when I dont necessarily know the table column namesI've tried various methods to give the table a header row and give the columns numerical names from a for > next loop, but am either getting no results, orystem.Data.DataRowView' does not contain a property with the name '7'. < or whatever numberThis is where I currently am:
EDIT: JUST REALISED MY CODE WAS AWFUL, SO UPDATED:
Dim paymentTable As New DataTable("paymentTable")
For j = 0 To UBound(paymentTypes)
[code]....
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Nov 21, 2009
I'm a beginner developer using VB 2008 Express Edition and SQL Server 2008 Express. I have tried my simple problem using many different ways and also have searched the web, LINQ to SQL, SQL commands, MSDN library, MSDN Forums, 'How do I' help document, and ... but come up empty. In my simple Table.mdf (see below), I have created some tables (T1, T2, T3, ...) which none is joined together. What I try to do upon request is to get a value string of specific row and column of table?
[Code].....
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Aug 15, 2011
I have a DataGridView which populates from an SQL query just fine in default mode
using these table names
[firstName] [varchar](20) NOT NULL,
[lastName] [varchar](20) NOT NULL,
[code]....
I have edited the column headers and set the column names to the same values as my table names yet the data is not showing in form load I have set datagridview.AutoGenerateColumns = False I know the data is there if I delete datagridview.AutoGenerateColumns = False then the data is shown with the default headings?
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Apr 17, 2010
How to check if string entered in a text box matches a field in a data table
I have a form with two text boxes for users to enter their Username and Password. When they enter their details and click the 'Login' button I want their details to be
checked against data in a data table to see if they match or not. I am using an 'if...else' statement but can't work out the syntax to use. My code is as follows[code]...Check when string entered in a text box matches field in data table?
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Apr 17, 2010
How to check if string entered in a text box matches a field in a data table.I have a form with two text boxes for users to enter their Username and Password. When they enter their details and click the 'Login' button I want their details to be checked against data in a data table to see if they match or not. I am using an 'if...else' statement but can't work out the syntax to use. My code is as follows:[code]The fields I want to match the textbox strings against in my database table are called 'Username' and 'Password'.
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Feb 24, 2010
I am building a data based application using VB 2008 an SQL Express. I need to create textboxes on my form using code, (With & End With) method. I need a simple code string that will allow the app to check if the field to wich the textbox wil be databound is Nul, If so the textbox will not be created.
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Jul 22, 2010
I am creating a database in VB.NET for a movie rental place. I currently have three forms;
Member Information
DVD Information
Borrow DVDs
What I would like to do is when I am viewing a member's details, if I click a button 'Borrow DVD for Member', the member's ID number transfers over to the Borrow DVDs table in the Member ID which also would hold some information from the DVD Information table, but I'm sure if i can figure out how to do this firstly, I will be able to apply the same rule and work it out myself.I have been trying to use a query statement like;
INSERT INTO [Borrow DVDs].[Member ID] [IN goodstuffvideos.mdb]
SELECT [Member Information].[Member ID]
FROM [Member Information]
but that has been coming up with error codes and completely not working.
Borrow DVDs table fields are: Borrow ID, Member ID, DVD ID Number, Hiring Fee, Borrowing Limit?
DVD Information table fields are: DVD ID Number, Title, Rating, Hiring Fee, Borrowing Limit Member?
Information table fields are: Member ID, Family Name, Given Name, Address, Town/Suburb, Postcode?
The error coming up is; Error in INSERT statement. Unable to parse query text.And under that it says The query cannot be represented graphically in the Diagram and Criteria Pane.
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Jan 11, 2012
I have got a class which contains more then 160 fields. i need the name of fields (not value) in an array. get loop through names for field or get list of field names in a array so that i can loop over it and use it in code. i am using visual studio 2010
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Apr 25, 2010
I have a table with fields player1Name,player2Name..etc. How does one create the field names dynamically. I tried this..doesn't work obviously.[code]....
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Jan 31, 2011
i want to input into my combobox the field names from a dbase file. this is the code i have so far:
Dim table As DataTable
Dim restrictions() As String = {Nothing, Nothing, Nothing, "COLUMN"}
Using connection As New OleDb.OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data
[code]....
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Apr 22, 2010
It is not so hard to get the field names from a database via GetOleDbSchemaTable and OleDbSchemaGuid.Columns. It works fine. The field names come i alphabetical order though. I really need them in the correct field no order.
Used code:
connection.Open()
Dim schemaTable As DataTable = _
connection.GetOleDbSchemaTable(OleDbSchemaGuid.Columns, New Object() {Nothing, Nothing, tblname, Nothing})
[Code].....
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Mar 2, 2010
I want to write a routine that loads a table (or query) and outputs it to a text file, with the field names in the first row.If I load the data via an adaptor class into a datatable, I can access the field names by something like DataTab.Columns(i).ColumnName.
As I only want to read the data from the table, using SqlDataReader would be more efficient. But how can I then find what the header or column names are? The following code fails with a message that the SqlDataReader class does not have a member called 'Columns ':
Dim sqlCmd As SqlClient.SqlCommand = New SqlCommand(SQL, Connection)
Connection.Open()
Dim Reader As SqlClient.SqlDataReader = sqlCmd.ExecuteReader()
Dim FName0 As String = Reader.Columns(0).ColumnName() '<==FAILS
Is there a way to find the column names of an SqlDataReader object?
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Oct 20, 2011
create a mailing list of my students with the usual lastname, firstname, address, city, state, etc. This all works fine - except that I'm getting multiple records for the same family when they have more than one children in our database. So, ideally, I would like to be able to group by the family name (which is grouped in a seperate Family table then linked to the student table by familyid), then in the second field list each child of that family separated by a comma.
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Nov 4, 2009
I posted in the Database development forum, but no bites. I have field names in my Access table which have a number as the first character (i.e. "2x2"). Evidently, the DataAdapter doesn't like this. I'm able to view the data in a DataGridView, but I get an exception when I use DataAdapter.Update.
Can I modify my sql statement to make the command builder work or do I have rename the fields?
For example:
"SELECT [2x2] as twoBytwo..."
Changing the names of the fields would be a huge pain-in-the-arse!
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Jul 8, 2009
I currently have this working already for one of my combo box's, but when i try to use the same code i get this error ''There is no row at position 6.'' . The are 2 fields in the table asset_type_id, asset_type_name', im trying to dispaly the values in a combo box for the field 'asset_type_name.
the code for ' Friend Sub RetrieveCustomerInformation2()' works but the other friend sub throws the error.
Imports System.Data.SqlClient
Imports System.Data
Imports System
Imports System.Data.OleDb
[Code]...
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Feb 23, 2011
I have a query that I have to run that requires me to get rows from a table based on the value of a field in another table (which I have gotten earlier). I currently have it done like this (simplified).
[Code]...
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Oct 5, 2010
Dim query as String = "Select * from openquery (devbook, 'SELECT wb.arrival_time FROM web_bookings wb ')"All I need is to convert my arrival_time into a datetime field in the query
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Jan 22, 2011
[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?
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Aug 13, 2009
I have a matrix with rows indicating a name (Ex Store name) and I have data pertaining to that in the DATA cells. I also have another date field in this format (MM/DD/YYYY). I would like to use a cross tab between Store Names and Just the Month of the date field.
[code]...
is there any expression I can use to get the month format on the header of column.
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May 18, 2010
i just got it in the internet and edited it..
Dim xlApp As Microsoft.Office.Interop.Excel.Application
Dim xlWorkBook As Microsoft.Office.Interop.Excel.Workbook
Dim xlWorkSheet As Microsoft.Office.Interop.Excel.Worksheet[code]....
what I want to do is have a column name in the excel worksheet which is not included in the code..i'm getting the data from a datagridview but it only shows the data in the excel.. i also want the field name of these data to be shown..another, as you can see in the code given, the directory is fixed.. what do i have to do to choose a directory to save my work? and also, i have many gridviews and whenever i'm exporting my work to the excel worksheet, it always overwrites my work.. i want to choose the directory to save, also show the field names, and make a separate worksheet for every gridview..
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Oct 23, 2009
I can;t seem to find anything that shows me hoe to get table names from an access DB using VB.NET. There is a main DB as well as tables linked from outside DBs.
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Jun 3, 2011
i recently posted a code that i had that i needed assistance for and it was solved it was for displaying all tables in a database.but now i have this code for showing all column names in a table i was in the process of turning it from oledb to sqlclient. GetOLedbSchema can be turned to getschema but when it comes to OleDbSchemaGuid
Public Shared Function getAllColumnNames(ByVal tblname As String) As String()
Dim com As New SqlCommand
Dim con As SqlConnection
[Code].....
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Jan 17, 2011
i have this code for showing all column names in a table i was in the process of turning it from oledb to sqlclient. GetOLedbSchema can be turned to getschema but when it comes to OleDbSchemaGuid
Public Shared Function getAllColumnNames(ByVal tblname As String) As String()
Dim com As New SqlCommand
Dim con As SqlConnection
[Code]......
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Dec 15, 2011
I'm trying to have a ListBox show a list of tables available in a database. This can then be selected to be used later on.My problem is getting the actual table name to show up. I have the connection to the mysql database working properly, but it just shows "System.Data.DataRowView"
[code]...
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Dec 29, 2010
I have a vb express 2010 program where users submit issues to different persons. The issue is emailed to teh selected persons and also saved in SQL on a server. Question is if they select multiple names from the list box to send the messsage to, how do I insert the multiple names into the SQL table? Here is the insert command I use. It will insert one name but will only do one if multiple names are selected. What am I missing?
[Code]...
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Jan 20, 2012
i two tables named tblaccess(nID,nRoleID,nModuleID,cAccess) andtblmodule(nModuleID,cModuleName) and i have a datagrid which is bounded to tblaccess. the problem is, I want to display cModuleName from tblmodule instead of nModuleID. please tell me how.
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Sep 8, 2010
I am using OledDb to create/retrieve/delete data from Access databases. At one point in the solution, I the user adds data to a new table and the table name is defined by the user. The obvious problem with this is that the user could add spaces, characters, and Access/SQL keywords that are not allowed in the table name. Later in the solution, the user should be able to identify their saved table and retrieve it. I have considered the brute force method of formatting the input to remove offending characters and then reformat for the user's view, but that seems like something I would like to avoid. I have also considered placing restrictions on the textbox with masks, key event restrictions, and checks for conflicts with keywords, but I would also like to avoid that. So, my question is, does anyone have a creative solution for identifying a table name with something like 'my name is table number *1'?
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Apr 21, 2009
Ive completed this code, and it enters names into the combobox, but not any of the tables that i have created. I have checked that they have been created and they have. An ideas?
Dim DatabaseConn As OracleConnection
Dim DatabaseConnString As New OracleConnectionStringBuilder
With DatabaseConnString
.DataSource = "XE"
.UserID = "SYSTEM"
[Code]...
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Jun 22, 2010
I want to add the table names from a database in sql server to a combobox with vb.net windows programming.
Its a customer accounts database where for instance I add a new Account holder which creates a new Table and when I want to view a specific account holder a want to select that account holder from a combobox that views the Table names.
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