Read XML Data From SQL Server (xml Datatype Column)
Dec 26, 2008
how to work with XML.I need to create an multilingual application and need to save the controls captions in sql table with xml data typei started the following:[code]I know this is not very professional but thats all i did until know in SQLNow i have a problem in VB.NET i don't know how to read an xml data type (How to get the value from variables).If somebody can give me an exmaple how to read the xml than i would continue translating for each objects in the form where name is like the variable "btnLogin" and give it the controls.text property to the variables value.
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Jul 22, 2010
my csv contain mix datatype f.ex. in cell E8 data format is date, and other data in this E column are string.i use this connetion string in classic asp ,VB Script and back end SQl server
ChekCnn.Open "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & Path1 & ";Extended Properties=""text;HDR=YES;IMEX=1;FMT=Delimited"""
Set rs1 = ChekCnn.Execute("SELECT * FROM myCSV.csv")
[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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Mar 27, 2011
how can i use value (23,32) in sql column datatype int how can i use comma in column data type int
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May 11, 2010
is there a date datatype in visual studio 2008? cause i want to create a column name with date as its datatype.. but the one that comes out is datetime..
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Nov 30, 2010
Dim pctofpax As New DataColumn
pctofpax = New DataColumn("PCTPAX1", GetType(Decimal))
pctofpax.Expression = "[ASOFPAX] / [YEPAX]"
[code].....
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Jan 13, 2012
What i am trying to do is get the data type of the sorted column that the user selects in order to properly convert a variable. the variable will be used to locate similar values in the dataset that populates the datagrid view.
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Sep 29, 2011
Im new to this .NET programmin...i just need to know some basic stuff abt readin data from excel..I just use ("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + p_fileUrl + ";Extended Properties='Excel 8.0;Mode=Read;IMEX=1;'") to read data.in a particular column,first ten or below cells hav no values and the rest has values.
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Sep 21, 2010
I am new to the forum and would like some guidance on how I can achieve the following. I would like to read data from a text file after which I want to do a simple calculation that totals one of the columns.
I have already been able to read the text file into a text box but firstly I'm not quite sure if this method of using the text box is appropriate and secondly how do I sum a column of data?
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Jun 23, 2009
how to change column into checkbox with datatype of Boolean?
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Feb 2, 2009
I have a dataset with numerous tables.I have changed the column type of a couple of columns in the source DB form smallint to int.No I need to update the datasets (and eventually the code) to the appropriate datatype.Rather than hunt around the dataset and find all the places where these columns are referenced is there a way to direct the dataset to go back to the DB, reread the queries and update the datatypes.I know I can either change the field or one by one go to each table and force it reread the query but I want the dataset to do it in mass.
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Mar 9, 2009
I have a column in DB called price with Decimal as its datatype. when I use:dim r as objectAccessConnection.Open()cmd = AccessConnection.CreateCommand()r = cmd.CommandText = "SELECT AVG (Price) FROM Sale;"I receive an error "Decimal byte array constructor requries an array of length four containing valid decimal bytes."It works fine with other datatype such as Integer and Double. What is my problem?
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Dec 25, 2010
I want this for a windows forms application (vb.net '08). I want a code for: I have a column called total that is of datatype double in SQL Server 2005. How can I sum this field or column in crystal report?
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Jan 24, 2007
I have to read some float values in vb 2005 from a binary file created in powerbasic .I have declared one structure to read this .In the structure i am trying to read those vaues in single datra type object but the values returned are like 4.02365-E67 I have tried all the data type but unable to read it properly The structure is
Structure ThirtyminUPD
<VBFixedString(10)> Dim MSymbol As String
Dim MTime As Int16
Dim Mopen As Single
[code]....
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Mar 27, 2012
I have this code that use to sort a datatable.
Dim sortingIndex As Integer = orderby
Dim DataTableNew As DataTable = New DataTable
DataTableNew = dt.Clone
Dim query = (From c In dt.AsEnumerable Order By c.Field(Of String)(sortingIndex) Ascending)
query.CopyToDataTable(DataTableNew, LoadOption.OverwriteChanges)
My problem is that with this method I always need (Of String) for it to work, so the date columns are also managed as Strings witch is the problem. Is there a way to use the correct type so the sorting is based on the type of the column?
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Nov 26, 2009
I have a field in a SQL Server table that is of type bit.When I try to use a Boolean in VB.NET when passing parameters to a stored procedure, there are never any matches. I have also tried passing an integer to the stored procedure and that does not work either.
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May 23, 2009
I'm trying to get a single field back from the data. (I am searching by a primary key so I should get 0 or 1 answer). Please help. The table that I am querying has one entry with user = someone, input to several columns with the ans column having "a good answer"
Code:
Dim reader As SqlDataReader
Dim par As SqlParameter
Dim result As String
[Code]...
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Aug 25, 2011
I use an OLEDB connection to read from an excel database, and this loop to read in all of the data from each of the columns
While reader.Read()
For i As Integer = 0 To reader.FieldCount - 1
temp = reader(i).ToString + ControlChars.Tab
output_file.Write(temp)
[code]....
Some of the columns contain date information, which are read in fine (usually as a string "2/20/2011" or so), but the headers of those columns are read in as a blank "". The headers for all the other columns read in fine, but not for the date containing columns.
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Mar 28, 2010
How can I use BigInt datatype of sql server in my vb.net code?
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Jul 30, 2009
how i read data from Sql server and write that in .csv file with vb.net , after that saving the .csv file with my own name and path? what must i do? for information data in sql like this one:
[Code]....
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Sep 9, 2009
I need to solve the following problem:- Create a server application which generates a random number every second- Have any number of client applications access the current random number through a dll (associated to the server) at anytime How would I do this? Anyone has a prototype VB.Net code for the server which does this kind of thing? I'm pretty sure I know how to write the client code.
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Aug 7, 2010
SQL Server has a Data Type of "Float". Visual Studio has a Data Type of "Decimal". In other words, if I have a variable in a VB.Net app that is defined as a "Decimal" ...can I move that value into a SQL Server Data Table column defined as a "Float"?
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Oct 13, 2010
I use a VARBINARY(MAX) column, because I have no idea what is going to be put into it. All I know is that as of this point in time, the data will be one of many traditional data types(Integer, String, DateTime, etc.)I also have another column that is meant to indicate the DataType so the .NET application can handle the data and validate input accordingly.Right now, for testing, I have a DataType table in my database that stores the "supported" datatypes for the VARBINARY column, and a foreign key linking to the column meant to indicate the DataType. This works perfectly, but it feels akward.
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May 13, 2011
what are the changes I need to for my DAL to support this.
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Oct 31, 2011
I'm currently writing a small app that takes data provided by an SQL stored procedure and makes it available for easy export for non-tech savvy users. I'm trying to make this as generic as possible, in that you should be able to plug in just about any SP and follow my template to have an export utility. I'd like to add a way to get the column names before running the SP from the SP itself. I had assumed you could just run the SP with impossible values so nothing is returned, then get the columns from the resulting VB.NET DataTable. However, if there is no data returned, the column names aren't returned either. How can I get the column names from the SP without having to hard-code them?
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May 19, 2010
Basicly I want to create a server that can read data sent by multiply clients and give feedback to them I have found some tutorials before but its only oneway trafic (Client>>>>Server) and the server crashes as soon as the client is disconnected
ps. If its a tutorial with VB it will be nice other visual codes are also good
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May 18, 2009
I am trying to read JSON data from a server to a dataset object, any idea on how this can be done. I have tried using the DataContractJsonSerializer class but it only seems to work for objects.
JSON Data
{
"firstName": "John",
"lastName": "Smith",
[code]....
The code above works to an object, but I want to parse the JSON data to a dataset object.
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Dec 2, 2011
I know how to select items from an array with LINQ, but what I can't figure out how to do is access a database using an IQueryable. I connected the database to my project, added two classes from the database to the "LINQ to SQL" .dbml file and saved it. In my programming assignment, I am not supposed to create a data source (table thing) to display the data, but update my own interface manually. In order to do it, I was told to instantiate this:
Private dogs As System.Linq.IQueryable(Of Dog)
(Dog is a class that I added to my .dbml file from the database file)Also, I am told it involves using a method
.AsEnumerable.ElementAt(index As Integer)
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Jun 12, 2009
i'm trying to make a login form connected to an sql server database. my data base has records like this:
fname - lname - minit
each name in a separate column, and i wanted to use the name as the login username, so in the dataset designer i made a new column and concatenated the names together like this: lname+fname+minit but at Dim dr As SqlDataReader = cmd.ExecuteReader i get this error:
"Invalid column name 'username'. Invalid column name 'username'."
i'm asuming that's because username doesn't actually exists in the database, only in the dataset.is there a way to get that to work with out the username column actually existing in the database?
Imports System.Data.SqlClient
Public Class LoginForm
Private Sub OK_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles OK.Click
[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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