I'm getting this error on a datatable.Load() :
Failed to enable constraints. One or more rows contain values violating non-null, unique, or foreign-key constraints.
If I use a DataAdapter it works fine, using the same SQL query.
I'm trying to load a datable into a datagridview, but column1 ("date") should be converted to a datetime, so I can sort it when I click on the datagridview header. I tried this, but it gives me that there is no column 0 or one. I have 2 columns: "ID" and "DateStart"
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I am facing another error "An error occurred trying to load the page. Member not found. (Exception from HRESULT: 0x80020003 (DISP_E_MEMBERNOTFOUND) )" performing the following scenario:- Opened a sample VS 2010 WPF project that I receiveved from a co-worker (Project compiles, and run on his machine)I tried to open project properties (Project --> Properties)The project properties panel/window didn't open, all it had was an error symbol (red/white X) and the error message above(HRESULT: 0x80020003).I am unable to view niether the designer window nor the code window (no messages are reported) but the pane where the code/design shoud display is empty, all you can see is the background color.
View 1 RepliesI have an sql database with multiple tables. I have been adding new columns to one of the tables as I need them, but now suddenly it has stopped allowing me to add columns.Everything works as usual until I add the 150th column to the table. When I drag the table from the server explorer to the dataset designer i get the following error:"Some updating commands could not be generated automatically. The database returned the following error: Dynamic SQL generation is not supported against a SelectCommand that does not return any base table information.If I remove the 150th column, everything works great. I tried using the wizard to regenerate the select and update statements, but it fails with the same error.
View 5 RepliesIt seems I've tried a million little variations of this and I keep getting the same error: "The SelectCommand property has not been initialized before calling 'Fill'
Imports System.Data
Imports MySql.Data.MySqlClient
Public Class clsDB
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Im trying to make a program that loads the first image in a folder then shows it on the picturebox1 then the user will press next, and that image will be moved to a foder named viewed. I got the code to move but I get an error saying that image is being used in another application. Here is my
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I am trying to code an Auto clicker in visual basic and i am having issues that i believe involve user32.dll..
View 9 RepliesI created a windows form which contains a datagridview. I named one of the columns in the grid 'location' which appears to have generated an error. The problem is I cannot load the form to remove the column as an error is generated and when I load the designer code it says do not modify with the code editor but use the windows form designer.
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I am working on an application which compiles fine on machine that is Win 7 and 64 bit CPU. But when copy and I run the exe file on similar machine (Win 7 64bit) I get error message: Error: Could not load file or assembly 'Interop.ActiveDs.Version=1.0.0.0,... I have added ActiveDS Type Library 1.0 C:WindowsSysWow64activedstlb as a reference in the project file.
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I am working on a project that takes an xml schema and xml data files and places them into a DataTable, the 2 files are generated from a working table that i have written to disk. I wish to load these 2 files into a DataTable. Here is What i have
vb.net
Friend Function CreateTable(ByVal tableName As String) As Boolean
Dim table As New DataTable(tableName)
table.ReadXmlSchema(tableName & ".xsd")
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this however produces the following error on line 3
Quote:
System.ArgumentException was unhandled Message=DataTable 'get_item_list' does not match to any DataTable in source.
get_item_list is the parameter passed into this function (tableName)
I have a datatable that has a resource in one field and hours used in another, it looks like this -
Resource Hours Used
Manager 1
Accountant 1
Field Staff 2
Accountant 3
Manager 4
Manager 1
Administrator 6
Field Staff 4
Manager 0.5
Administrator 1
What I want to do is be able to create a summary of the data table above that groups multiple occurrences of a resource and adds up the hours used for that resource, creating a summary that looks like this -
Resource Hours Used
Manager 6.5
Accountant 4
Field Staff 6
Administrator 7
I found the following example on [URL] Unfortunately, I need it in VB and it's using some constructs that neither I nor the automated code converters reciognize. Anyone out there know how this should be written in VB.Net? (the problem spot is the "select new {...")
PeopleDataSet ds = new PeopleDataSet();
using (PeopleDataContext context = new PeopleDataContext())
{
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[code]...Load DataReader into DataTable
This code return an error, and with breakpoint i get this error on the items line:
"Item = In order to evaluate an indexed property, the property must be qualified and the arguments must be explicitly supplied by the user."
Scenario is this; I've a sqldatareader query that seems to be returning nothing when I try to convert the sqldatareader to a datatable using datatable.load.So I debug into it, I grab the verbose SQL query before it goes into the sqldatareader, just to make sure it's formatted correctly. I copy and paste this into SQL server to run it and see if it returns anything. It does, one row.I go back to visual studio and let the program continue, I create a datatable and try to load the sqldatareader but it just returns an empty reader. I'm baffled as to what's going on. [code] Ok I've done a loop to count the rows of the datareader before using the datatable.load method. In my test query I'm getting 4 rows (the correct amount) in the datareader, as soon as I use the datatable.load method it says the datatable is empty, what's going on?! So it seems a datareader is a one-way thing, iterate through it to get the row count and it's essentially empty as far as any other bit of code is concerned. Didn't realise it was forward only and wouldn't 'reset' once read through.
View 1 RepliesI'm trying to load a datable into a datagridview, but column1 ("date") should be converted to a datetime, so I can sort it when I click on the datagridview header
View 7 RepliesThe project is a web app in ASP/VB.net. The issue is that some pages are mind-boggingly slow. After trying to track down the bottleneck, it was discovered to be the load method when filling a datatable with query results.
We are using an Oracle database and queries are executed in stored procedures. As an example, we have a relatively simple select statement within a procedure which returns 2 columns with 6 rows which was determined to take about 0.015 seconds to execute. However it takes on average 7 seconds to load the OracleDataReader into a datatable - a ridiculous amount of time for such a small record set. After messing around with the query, I found that a simple decode statement appeared to be causing the issue. The decode statement is used similar to as follows[code]...
The iBln variable is simply a number being passed in to act as a boolean variable for determining which column should be between two dates. If I comment this decode statement out and make it simply "column1 BETWEEN iDate1 and iDate2" then the load method takes no time at all as it should, signifying that it is indeed the decode statement causing issues.
I have returned xml data in a variable and need to loop through the returned xml and pull certain data from select nodes.
I was thinking the best way would be to load into a dataset (or datatable) and loop through that.
I also have the xmlschema. What's the best way to code this?
I thought I could do something like so but it gives me the following error: DataTable 'newdt' does not match to any DataTable in source.
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have a lot of experience with LINQ, but should your verb be attached to the array?
data.Tables("people").LoadDataRow(parsed(int1, 1), True) S/B
data.Tables("people").LoadDataRow(person.parsed(in t1, 1), True)
I'm following advice to load data to a DataTable, binding to a BindingSource then a DataGridView. But some exzamples I've found use a DataAdapter, not a DataTable. [code]
View 3 RepliesI have a datagrid and set of collection of columns for the datagrid. I have added cloumnname and headertext using column collections in design time. I have made false of autogenerated column. I was unable to load the data in datagrid from datatable. If i remove the collection and add bind data in datagrid means working fine but not for the column collections.VB.net windows application.
View 2 Repliestrying to get my hands wet on vs 2010 and i downloaded samples from ms site but when i tried to run some of the DB samples i received this sql error: A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) any ideas how to get around on this?
View 5 RepliesI have this code which should populate my datatable after someone has entered text into my textbox
My issue is at this line of code Delivery_Adapter.Fill(Me.DeliveryTable) I get thisd error;
Value cannot be null.Parameter name: dataTable
When when I run this command in SQL management studio i get one row.[code]...
I'm using VB Microsoft Visual Studio to try to open an excel file, clean a column of data, then load into a datatable for use by program (enter Excel data into Reflections, process / screenscrape, enter data into Access db).
I can load the data into a datatable just fine, but I'm having problems figuring out how to open the excel file BEFORE it's loaded into the datatable so I can "Clean" a column of data the program reads from that can potentially have hidden characters. Below is what I have so far.
Sub SelectnLoadExcelFile(ByRef errFlag)
dt.Clear()
errFlag = False
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I want to load a csv file (A comma delimited text file) into a datatable. I found the OdbcDataAdapter Class which looks perfect, but it says it is supported only in version 1.1 of the .NET Framework.
Is there a better way to import a csv file into a datatable? the first line has the column headers.
I am using Visual Studio 2008, using version 3.5 of the .NET framework
Why does the following code give an error?
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If I change the code to remove the second field, as below, then the code does not give an error.
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I am getting this error cannot convert string to datatable
The code is
dt = CType(Session("result"), DataTable)
I am trying to store the session value in dt which is a datatable. The session result contains string values.how to convert the session to datatable and store the session value in the datatable.
I am try to filter some data and add to another datatable. While Run time the Error is shows Column *** already belongs to another dataTable Here My code:
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I am getting a syntax error " Missing operand after 'Price' operator" with the following code, which should be right but obviously isn't. Any thoughts on where the error is?
table.Columns.Add("ADR Price", GetType(Double))
table.Columns.Add("ORD Price", GetType(Double))
table.Columns.Add("Currency Price", GetType(Double))
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i want to read table row by row i have table with two columns but i want to read the first column only row by row her's my code
Dim col As String = "SELECT users.user1,users.valueid FROM users"
Dim cmd As New OleDbDataAdapter(col, CON)
Dim ds As New DataSet
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I am facing below problem. Cannot perform '=' operation on System.Int32 and System.String.
What I tried to do here is I have a dataset get from SQL Express 2005 and I am adding a new row to it and it hit the above error.I combine 3 tables in SQL and return the data to my win application.And I add 1 row to it. here is the data type in my sql statement.
SELECT cd.indexNo, c.custid, c.companyname, c.contactperson, c.contactno,
dt.Type, cdm.DrawingMaterial, cd.Size, cd.Roundness
FROM rpts_customer As c, rpts_custdiesdetail As cd,
rpts_Type As dt, rpts_CustDrawMaterial As cdm
WHERE c.custID = cd.custID AND
cd.cdmNo = cdm.cdmNo AND
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