This is what I'm trying...
Dim myCommand as SqlCommand
Dim myTable as New xsdObject.ObjectDataTable
myCommand = DataAccess.GetSQLCommand( "MyStoredProc", _
[code]....
'How to access my data ?
Use ExecuteSQLCommand and return my data in a datatable and access it? This is what I'm trying.[code]...
View 2 RepliesI'm trying to do a LINQ Query against a typed datatable that will return me duplicated data.With out going into too much detail, here's the basic setup:
strCode1 - string type
intCode1 - int32 type
intAdjustor - int32
There are more fields but these are the ones that are important.I'm going to do my best to describe this, as it's kind of confusing.In theory intCode1 is a key for strCode1 (hence the names). So each time intCode1 is duplicated, the same strCode1 should appear. Example:
[code]...
Ultimately I'd like to get a List(Of T) - where T is my typed data row. In SQL, I would simply use a sub query, to get a distinct list of strCode1 and intCode1, then do a count, grouped by strCode1 where I get more than one row.I'm not sure how to translate that into LINQ, AND get the original types data rows returned in a list.
Im writing a data access layer for my application.There are several functions that need to return a list of items like Employee Name, and EmployeeID so it can be bound to a dropdownlist.What would be the proper datatype to return, a Dictionary?The lists only contain 2 columns, a name and id.
View 5 RepliesI am trying to add data to a access datatable column I am using a richttextbox to fill in any data but when i save it to a column in a database and if there are more chars then 255 then i get an error (try to enter more then column lenght) anything under 255 is working fine the column in access = type of 'MEMO' so no limited to 255 it's the hystory to send that is giving me the problem
Dim history_to_send As String
Dim day_to_send As Date
Dim ID_to_send As Integer
[Code]....
It's been a good few years since I dabbled in VB and I'm very very rusty so any help would be great! What I'm looking to do is search an access database with user input and display the relevant record.I have a single table set up in an access database called school_info with the following fields and data:
Tres________DfE________Name_________Type
001________1234________School 1________Primary
002________4321________School 2________Secondary
[code]...
I've linked the database to my new project, connected the database and added the 4 fields to my form. When I run it, the data shows in the boxes fine.The Tres and DfE fields are show in text boxes on the VB form, and the school and Type are show in labels. What I really want to do is be able to manually type in either a Tres or DfE number into the relevant text field and have the other labels auto populate with the relevant data that's stored in the database table.
I've created a basic search form. I have a textbox with a search button and an Access Database as the backend. I have also added it as a new datasource. What I'm looking to do is grab the search string from one textbox and return the data to another textboxt. I have a table called "VehicleInfo" and I want to search the field in my table called "VehicleID" and return the vehicleID I searched for into another textbox. I'm really new to VB. I understand databases and basic code structure, I just don't have a good grasp yet on how these two work together.
Public Class frmMain
Private Sub frmMain_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'TODO: This line of code loads data into the 'Garage_ServiceDataSet.Service' table. You can move, or remove it, as needed.
Me.ServiceTableAdapter.Fill(Me.Garage_ServiceDataSet.Service)
[Code] .....
I'm creating my Data Access Layer and I want to return my object but not all the fields so this is the code i'm using
CODE:
I then call this method in the Business Logic Layer
CODE:
lastly I try to call in in my user interface and bind it to a DataGridView
CODE:
But I keep getting this error: Unable to cast object of type 'System.Data.Linq.DataQuery`1[VB$AnonymousType_0`3[System.String,System.String,System.String]]' to type 'System.Collections.Generic.IEnumerable`1[PP_DAL.DCProposal]'.
Source: DataTable
Destination: Access Database Table
I should mention that the DataTable contains data resulted by an SQL SELECT query and it's not related to the "targeted" Access Database Table.
I have the following piece of code that I am using to try and rip a csv file and turn it into a datatable. My problem is that the debugger never makes it to the return statement. Everything is appending to the datatable correctly, so I know that part works. Any idea's on what I can do to trouble shoot this further. Also, if you know of a simpler way to turn a import a csv file to a datatable I'd be very interested in learning about it.[code]..
It say that the Object reference is not set to an instance of an object. What's weird though is that it works through the whole data table fine. Could it be that the while loop is not terminating at the end of the file?
i have a function and i want to return a datable using EntityClien,[code]
View 1 RepliesCurrently, I am using a loop to find the row I want to update.
Public Sub pubsub_SetUserDGVColumnWidth(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewColumnEventArgs)
' update all user settings for the given column
[Code]....
I understand that DataTable.Select() returns an array of rows. I just want to know whether these is a way to get the row indexes as well.
View 4 RepliesI have the following code that loads an XML file into a datatable (I went this route because I do not know how to query XML directly). I want to use the Select method to return a row where "age = 72". However, I can't seem to get this to work. Also, if there is a better way to search through a datatable for specifc values that would not require iterating through the whole table to get the results
Imports System.Xml
Module Module1
Sub Main()
[Code]....
I'm having the datatable with three columns, i need to return the rows in which the third column having the null values.
ie., I need to do like this below mentioned coding,
Dim rows As DataRow() = ds.Tables("Tablename").Select("col3 is null")
Is it possible? if no, anyone tell me the way to get the results.
Currently I have a gridview bound to a datatable which is populated with groups from the AD. I need to be able to add search functionality so users can type in part of a group name and have the results display only groups that fit their search criteria.
Here's what I have so far.
<asp:TextBox ID="searchParam" runat="server"></asp:TextBox><asp:button ID="btnSearch" runat="server" Text="Search" />
<asp:GridView ID="dgSearchDLs" runat="server" AutoGenerateColumns="False" DataKeyNames="cn" DataSourceID="ObjectDataSource1">
<Columns>
[code]....
I use SqlDataAdapter.Fill to retrieve data from a SQL2000 Server, and the datatable is updatable.
Recently, we plan to upgrade to SQL2005, during testing we found that the same statement will return a datatable, which is readonly We need to change the column's readonly property in order to update it.
I have some VB code like
Dim data As DataTable = DataAccess.ExecuteDataSet("AuthenticateWebServiceClient" _
, New SqlParameter("@ClientID", ClientId) _
, New SqlParameter("@Password", Password) _[code]....
Except PrepareSPCommand isn't recognized by VS. Does anyone know the correct way to convert this function to C#.
how to copy data from datatable to table in dataset i ry this but its readonly property
ds.datatable1=newdt.copy
I am updating a data table (dt_report_crypt) from an encrypted csv file in the code below:I decrypt the colums and update the same dreport_crypt, such that it will contain de-crypted data.This part is working wellI however need to use this de-crypted datatable as a data source to update a second table(dt_report), using the sql SELECT command to filter relevant data,
Dim dt_report As DataTable
Dim dt_report_crypt As DataTable
Using cn As
[code].....
An in-line table valued function in SSMS takes about 6 seconds to return 11088 records. The same function in VB .Net 4.0 using TableAdapters.InputTableAdapter.GetData (Created with data set designer) takes about 15 minutes complete.Both are executed from the same workstation.Why does this discrepancy exist?
Workstation:
Windows XP SP3, 2GB
VS2010 Ultimate
.Net 4.0 Framework
Server:
SQL Server 2008
There are two combo boxes taking user's inputs to return a record in an Access Database satisfying the requirements. This procedure is controlled by a button. However, when it reads "da.Fill(dt, "NETP_ParaList")". It reports error saying that "ArgumentException was unhandled; Object is not an ADODB.RecordSet or an ADODB.Record. Parameter name: adodb" I have no idea what this talking about.
[Code]...
I'm trying to write a console application in VB.Net (2008) to accept a command line argument input (a password) and output the hash. I modified the code here so that it would accept an argument and I added my own salt/key but the output appears to be incorrect when compared to PHP's output for the same password and salt.I need something like this so I will have a way to get a SHA512 hash using MS Access VBA. Can you recommend a better solution than what I'm trying or point me to something simpler than the link above? I could possibly post my code here but it's quite long.
View 1 RepliesI have an access table and I want to write a query that has a case in it, but it gives me an error message when running the query Error "Syntax Error missing operator in query expression"
[Code]...
I am using an Access database (mdb file) and for the first time ever I'm connecting to it using a bunch of TableAdapters created in a DataSet.xsd file.I added an Insert query to a TableAdapter, and now I need to retrieve the ID (autonumber) of the last inserted record. Usually, I would send a "SELECT SCOPE_IDENTITY()" query and it would return the ID, but for some reason I cannot get this to work with the TableAdapter.
I tried two methods:1. Add the SELECT SCOPE_IDENTITY() query directly after the INSERT query in the TableAdapter. This method is described in every website I found by googling my problem. Suppose my INSERT query is this:
INSERT INTO Test VALUES("1", "2", "3")
then I should now modify it into
INSERT INTO Test VALUES("1", "2", "3");
SELECT SCOPE_IDENTITY()
I also changed the ExecuteMode to Scalar.
Ok, I run this code, but it doesn't work. It gives me an error saying Characters found after end of SQL statement.Is it because I am using Access and not SQL Server maybe? I dunno... But whatever I try it doesn't work. It's not a spelling error, and I did type the semicolon to separate the two queries so as far as I know it should work.2. Add a separate Select query (selected 'Select query that returns a single value' in the designer) that simply executes this:
SELECT SCOPE_IDENTITY()Then after using the Insert query I can simply call this query method and get the last Id. But unfortunately this doesn't work either. It doesn't even let me add this query in the designer, it says Unable to parse query text.
i have 2 forms. In form1, I created a dataTable with 10 rows of data to be display in Form2. However, when in Form2, I can see all the info. But when i created an button to count the number of rows, it return 0 where there is obviously 10. I understand that in Form2, in order to count the table, i have to create a new variable for DataTable. And this variable in Form2 is actually create a new dataTable. is there a way for me to access the same dataTable that is created in Form1 in Form2?
View 3 Repliescreated a small application that I'm able to add items from an access DB to a ataGridView.Now, My questions is: suppose that I have a list of item in this DGV,containing name and Quantity. Now I would like the database to be updated with new values on Quantity column, something lke this: (Current values - Quantity on DGV).
View 1 RepliesWay to access datatable rows
[code]...
I'm working on an access database and there is a problem I can solve in a circumvented way but I was wondering if it can be done by using a function in query.The case: I have a main data table and 2 other tables joined to it.
maintable
country | city...... | postalcode [code].....
From one of the tables I select the respective zone for the postal codes in the main datatable, ie. if the row's postal code column contains 1000 (just an exmple) then the postal code is searched in the "zone" table "from" & "to" columns using "between", and it results in for example "zone1" (zone column). This is a clear thing, it works okay.However I need to select the respective rate column (based on the rows' weight column) from the rates table selecting the appropriate zone.
I can solve this by a switch statment (select country, city.... switch( zone="1", [1], zone="2", [2] etc.) but it gets very tedious when for example I have a rate table with 15 columns, you can imagine that.My question is if I could create a custom function which returned the respective column based on the result of the zone column.is there some way to get the function's return value to be translated in the select statement? for example select country, city....getzone("rates",[zone]) .....
I know that the rates table do not follow the relational database's main principle and it should look like fromkg | tokg | zone | rate and it would work like a charm with "where"but these tables are changed regularly and I receive them in excel...but maybe transforming the tables each time by unions would easily solve my problem doesnt it?I'm still interested if VBA custom function could be used for such a purpose.
I don't know if this is the best way to do it or not but here goes.I have an access database and a datagridview and they link via a SELECT statement at runtime.I want to total one column named LNLMTS and display the result.I am looking at using SELECT Sum LNLMTS FROM tblProduction WHERE SO=@so AND DATE=@date
View 8 Replies
