Get The Number Type Data As A Number Type Using The Dataset Readxml Method?
Feb 17, 2010
i am getting the xml using readxml method. And then display the data in datagrid. But number type columns comes as string type in the dataset. So when datagrid displays , sortingdatagrid columns is not correct. For example it sorts like this:
i want to set a default number and you type in a textbox a random number it should tell you whether it's high or low ,and when you typed in the right nmber it a lable should says something like you win .And also how can you change PART of a lable by typing in a text in a DIFFERENT FORM
i have a column in datagridview composed of numeric as well as aphanumeric. What i want is when the user sorts the column, it will be sorted according to its number value, 1,2,3,4,5,6,7,8,9,10. However it my current module, the program sorts basing the first digit of the column. like 1,10,11,12,2,3,30,31.
i was thinking of converting the type to number so that it will be arrange properly, is this possible in the datagridview to covert type? because i saw only a readonly property celltype? i have also tried casting it in the sql query itself to INT but it did not work.
my application has a data table, one of the column set as decimal type to store number, data is read from a text file and store into the data table, then display in a datagridview, I found when that number is only 1 digit, that cell displays nothing (I think no number is being store in that cell), if I type a 1 digit number into that cell is fine. for example,
I am trying to filter a dataset using a number different inputs, selected by a number of check boxes. I have all the text base rowfilters working, but I can not make the date filter work unless I hard code the datetime into the code. The database is MS Access and I am using VB2008 to show the data. I would like to be able to use a DateTimePicker to set the filter date (without the time part) Also I would need to remove the time section of the datEnterDate. I cannot change the structure of the database fields. Also the datEnterDate is MM/dd/yyyy, because I'm in England I would like to use the format of dd/MM/yyyy if possible
I have a Dataset Lets call it Dataset1. I have 1 table in this dataset created in designer called settings. I want to be able to declare the intial dataset in one form as a global variable and make a copy of it in another form. However I don't want to fill it until after I have made the copy except that it is not working.[code]The problem is the Dt returns the same amount of columns and the exact column names that I have in the settings datatable. When I do Dt.ReadXml("Myxmlfile") I don't get any rows populated yet the columns are in the xml file and in the dt copy of the datable.
i am trying to copy data from a standard Dataset to a Type Dataset (XSD) of same table structure. i want to use Automapper to do that one. So how can i do that using automapper?
im trying to create a program where the user will type in a number then choose the units its in and units it will be converted to from 2 comboboxes. The output should be changing as different units are clicked without a button.
Public Class Convert Sub Calculate() Dim Unit1 As Double = (ComboBox1.SelectedItem)
I'm familiar with programming/scripting.I started playing with Visual Basic when I realized my tech school had it installed on the network computers, and became a bit addicted (within a few days) of the possibilities it contains.I've started writing something basic.. a number guessing game in a Windows Application. The layout may not be optimal/strategically formed, because I'm not familiar with the language yet.[code]...MsgBox("You've got it! The number was: " + Rand, MsgBoxStyle.Information, "Winner!")'This line is highlighted with this message:'Conversion from string "You've got it! The number was: " to type 'Double' is not valid.
Public Class CalculationParameter{ public Long TariffId{get;set;} }
In a workflow activity, I've an Assign like this:
(From tariffDetail In db.Context.TariffDetails Where tariffDetial.TariffId = calculationParameter.TariffId).FirstOrDefault()
Dto is passed to Activity as an Input Argument.It raise following error and I'm wondering how to assign Id.LINQ to Entities does not recognize the method 'Int64
GetValue[Int64](System.Activities.LocationReference)' method, and this method cannot be translated into a store expression.
How can I assign the calculationParameter.TariffId to tariffDetial.TariffId?!
UPDATE:Screen shot attached shows that how I'm trying to assign calculationParameter.TariffId to tariffDetail.TariffId (car.Id = Dto.Id) and the query result should assign to CurrentTrafficDetail object.
Is there a way to allow the user to only type in a certain number of characters in a datagridview column? Like a invoice number can only be 1-6 digits long and I want to stop them from typing more than 6 digits.
This is my code, and when I run it, it says type mismatch, and when I try to debug it, it highlights this line "If strVowel = Chr(65) Or Chr(101) Or Chr(105) Or Chr(111) Or Chr(117) Then"
Dim intX As Integer Dim intY As Integer Dim strVowel As String Dim strInput As String Private Sub cmdCount_Click() [Code] ....
Can anyone help me to break down the instructions for this assignment.Create an application that allows the user to type in a 32 bit number using the binary system, and convert that number into the decimal numbering system.For example, the user types 000000000000 0010 (where there are 30 leading 0's, 1 then 0 from left to right), and the output would be 2.The user will type a string that is 32 characters in length.A For loop 'reads' each character using the x.substring(i,1) where i is the current character we are reading and 1 means one character only,and x is the entry the user typed (use a Textbox to get the entry but Inputbox is also ok).When you start at the first character (from the right) then that value is to be * 2 ^ 0 then the second character is to be * 2 ^ 1, then the third character is * 2 ^ 2, hence:( x.substring(i,1) converted to Integer ) * 2 ^ j represents the decimal value of the current number (0 or 1) we are reading.A variable is needed to accumulate all those values.After the loop is done, display the accumulated value.To test this code on a simple version, enter a 4 digit binary number, where 0010 is decimal 2, 0110 is decimal 6, 0111 is 7, and 1000 is 8.
My understanding is the user must enter 32 digits into a textbox. The textbox should place limitations that only allow the digits "0" and "1". This error could be displayed to the user with a messagebox that then asks to reset the value orginally inputted into the textbox. My understanding is I should continue creating the formula of the position of each character where the third character is *2^2, fourth is *2^3, fifth is *2^4 and so on? I don't understand the formula and how it works.
how can i code a simple program to generate the maximum number i enter/type within 3 or more numbers using math.max. for example, if i enter 25, 60, 45 how can i use math.max to calculate the largest value out of the 3 numbers?
I need to read data from an Excel sheet as part of a data conversion. Certain columns contain mostly numeric data but may contain some alphanumeric data somewhere in the excel sheet. The problem is, my conversion sees the alphanumeric values as null (or blank. Using the .ToString() method returns ""). To connect to Excel, I'm creating an oledb connection, creating an OleDbDataAdapter, then filling a DataSet with the adapter.
Here's the VB code for connecting: private _oleadpt As OleDbDataAdapter private _oleconnection As New OleDbConnection Dim olecomm As OleDbCommand '_database comes from a settings file and is the full path to an excel document Dim connstring As String = "Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" & _database & "; Extended Properties=""Excel 8.0;HDR=YES;""" [Code] .....
I think the data adapter is determining the datatype for the columns based on the first however-many rows it looks at. It decides the columns with numbers are numeric which is the start of my problem. Changing the formatting of the column in Excel doesn't seem to affect the datatypes in my data set. Is there a way to tell the dataadapter or dataset what type of data to use for a column? Or should I try to cast the data in my SQL statement?
When setting a DataSet row column to Nothing, like row.Date = Nothing, why does it initialize it to the data type minvalue? In this case a date, that gets set to 0000-01-01. The column is set to allow null etc., and if I don't set the row to anything at all, it will leave the column empty. So why does Nothing act this way?
In C# I would've set it to DbNull, I guess, but I'm a tad green on VB.NET - as you might be able to tell. :)
VB Private Sub ExportDatasetToCsv(ByVal MyDataSet As DataSet) Dim str As New StringBuilder For Each dr As DataRow In MyDataSet
[code]....
I am getting an error on this line: For Each dr As DataRow In MyDataSet The error is Expression is of type 'System.Data.DataSet', which is not a collection type.