I have a property active to indicate status of an employee. Along with all the details, i extract the details from an employee table into a dataset, but however i am not able to get the value present in active as i get an invalid cast exception.
This is the property declaration.
CODE:
Reading bit type sql server db column from dataset
View 3 RepliesI have a dataset and want to know the data type of a specific column. The GetType returns datacolumn not string or integer etc.iggy!
View 2 RepliesI 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?
I am reading data from the database with SQLCommand object SQLReader, all I want to know is I want to read a specific row from my column myData...e.g.I want to read row 11 or random row from mycolumn, what is the correct syntax I am reading all the data(rows) from mycolumn with the command
"SELECT mycolumn from Table1"
what is the syntax to read the 11 or any row of this column?
I am trying to read some data from an Excel 8.0 worksheet using OLEDB thusly:(Warning - contains curly braces)
Code:
DbProviderFactory factory = DbProviderFactories.GetFactory("System.Data.OleDb");
using (DbConnection connection = factory.CreateConnection())
{
[code]....
The problem is that for some columns it sets the data type to be Double even though the spreadsheet column format is "Text" and teh column contains non-numeric data. Then when it gets to that cell it returns DBNull instead of the text value.
I am using sqlserver2005.Table1 has a column named bill_no and its type is textNow I want to change its type "Numeric"When I do this the it displays this error message
View 3 Repliesi 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?
View 1 RepliesI'm writing a help application for the Customer support team at my company to help agents ask better questions when customers report problems. In it, I've got a SQL database that contains all the products, topics, and questions. The layout is similar to the following:
Products Table:
Product_ID Product Name:
Topics Table:
Topic_ID Product_ID Topic
[code]....
I don't know if I'm making myself clear, but I basically need to do the equivalent to the following SQL statement: "SELECT PRODUCT_ID FROM Products WHERE PRODUCT_Name = LstProducts.SelectedValue"
This is my programs complete code, the only problem is i want to fix the amount of decimal places that show up in my gridview. The problem is if i do this on the asp side the location of the column gets thrown off and the column is duplicated. I figured if i just remade the table on the asp side it would work only problem is if i remove the sql for that particular column the asp side column cannot get data.
Imports System.Data.Sql
Imports System.Data.SqlClient
Imports System.Data
[Code]....
' USED TO REFRESH THE PAGE WHIN IT IS POSTED BACK
If (IsPostBack = False) Then
' USED TO DISPLAY DEFAULT FIRST ITEM IN THE DROPDOWN
Dim Li1 As New ListItem()
[Code]....
I have to read dataset in javascript. So that I have to bind Study_Desc in DropDownList.
- Below code is in the LOAD form event.
- Within TMEMBERS table there is a TOTAMT field.
- Question is: What is the code to read TOTAMT field as I need to do some calculations as part of the LOAD event in this form. Not sure how as this was generated by the dataset wizard and not the tipical Dataset manual definitions.
'TODO: This line of code loads data into the 'DsMP.TMEMBERS' table. You can move, or remove it, as needed.
Me.TMEMBERSTableAdapter.Fill(Me.DsMP.TMEMBERS)
- calculation lines will be here.
In the following example I m getting a response from the server; however do I need to set ASCII or UTF8 encoding type ?
Dim objURI As Uri = New Uri(URL)
Dim wReq As WebRequest = WebRequest.Create(objURI)
Dim wResp As WebResponse = wReq.GetResponse()
[code].....
My application uses a badly arranged Excel spreadsheet as a data source. I say badly designed because there's no unique identifier to each row aside from the column where dates and times are found. My app uses the date and time on each row as an identifier to retrieve information from the other columns in the row. The idea is that the user will select a date/time from a ListBox at which time, the app will loop through the DataSet and find the date/time in the right column and display the rest of the info in that row. My issue is that the ListBox control isn't being populated and I can't see why...
Here's a sample row from the spreadsheet: (Each | character represents a cell border)
Team - FNB | O | 2010/02/18 08:59:24 | 5034 | Frederico Turnbridge | 27839963586 | SA - MOBILE - (ZA) | | 69 | O_NORMAL | | 00:01:06 |R 2.83
Here's my code:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim j As Integer = 0
If TextBox1.Text.Length = 4 Then
For i As Integer = 0 To CallData.Tables(0).Rows.Count - 1
[Code] .....
This basically works on a search where the user will specify a term to search for (be it a telephone number or (in this case) a telephone extension) and a date range. Now, I know for a fact that the spreadsheet (and thus, the DataSet) has information where the date column - column index 2 - falls within the date range I'm specifying and the column after that contains my search term, but I'm not getting any results.
When I load data from xml to my dataset I want to apply this changes to database. This is my code, so far unsuccessful. [code]
View 6 RepliesI have a dataset which creates a table adapter to the table I need. I call a query on that table adapter which returns the number of fields returned. In this case it's one field and will always be one field.. I am filling a variable with that query.. however instead of the fields returned I need the actual data.
This is how my current code sits...
vb.net
Dim aUserName As String
'TODO: This line of code loads data into the 'DataSet1.IT_Staff' table. You can move, or remove it, as needed.
aUserName = Me.IT_StaffTableAdapter.FillByUsername(Me.DataSet1.IT_Staff, SystemInformation.UserName)
Do I have to load this into a variable declared as a datatable then somehow call the column and row 0's value? If so how?
I use a dbDataAdapter to populate a DataTable from an unlinked oracle database.I have a dbDataAdapter that I want to insert rows into an SQL Server table using SQLCommandBuilder.I have been trying all day to update the DataTable that references the SQL Server table with the data from the Oracle DataTable so that I can insert the rows.
View 2 Repliesi 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:
Salary
1180
12133
[code]......
devicetypecollection = New Collection
devicetypecollection.Clear()
For Each dr1 As DataRow In _Default.ide.dtds.Tables(0).Rows
[code].....
In my application, I have a dataset, automatically created by the VB, called "Batabase1Dataset".This dataset, will "connect" to the file Database1. sdf in the directory of my solution..Is some moment of the program, I need the dataset will read the data from the file "c;estdatabase1.sdf", instead the file: "....MyAppdatabase1.sdf"..How can I change the path of the dataset reading?
View 3 RepliesDim ds As New DataSet
Dim xmlfile As XDocument = XDocument.Load("devices.xml")
Dim reader As XmlReader = xmlfile.CreateReader
[code].....
I am having dataset with 5000 records.I am reading them in the below 2 functions and writing to excel.
FillDataRows1(worksheet)
FillDataRows2(worksheet)
private sub FillDataRow1(byval ws as worksheet)
[code]....
When I create thread also it is taking same time .
I have a dataset column which is "newsID".I want to get the value of it's last record so that I can use it as a default value or starting point to auto increment when I add a new record using the BindingNavigator.
View 1 Repliesmy application read excel file into dataset.The excel file is actually look like a report. the total column for each row is different. how to count total column for a particular row?
View 15 RepliesI have a Customerdataset as follows[code]...
I want to sort it out on Route sequence and put it in the Listbox in order.may represents other numbers.So in the list box..[code]...
I am making a combobox from my data source. Basically, This is a projects form and the user needs to select the the primary contact which is contrained by the customer id (GETbyCustomerID) set in another field. I have it working... mostly except the combobox only displays the contact ID which is completely useless to the user. I need to know how to display the First and Last name (both are seperate columns in the table).
View 1 Repliesi tried creating a dataset using the myodbc driver 5.1 (which im sure is correctly typed in because that is the exact same connection string i used for data manipulation within my app.now, im stuck. i cannot generate any reports because the dataset i created can not return any field information w/c is confusing because it displays the names of the tables from the database. is there any way i can import all the data i need to my reports programatically??
View 3 RepliesI want to insert/edit date automatically in the DateCreated column and the SystemUser column to track the date and user who entered ther details into a dataset. I am using data bindingsource to bind controls to the dataset
View 3 RepliesI am a beginner to VB.net. Still learning and have a lot to learn.I am confuse on dataset and binding source.I want to update the columns in the current dataset.
I have a listbox to reorder the sequence.Once those are reordered, the sequence number should be wrote back to the "Sequence" column in the dataset.
After pointing to the current row in the binding source, I don't know how to write back to the column.[code]...
I'm making my own ID field (highest number + 1) and using it when I insert a row into my tableadapter, and I've tried two ways...
Ordering my dataset by ID descending and picking the first row does nothing for me.
I've tried building a datatable and ordering it descending and choosing the first row. This works great until you get to 10... Then it counts 1, 10, 2, 3, 4...
How can I make a textbox, label, etc be the next ascending number in my column Highest Number + 1?