.net - Find Whether A Filtered BindingSource Contains An Item From The Underlying DataSet?
Apr 25, 2012
I've got a databound query in my application which is querying the "Customers" table in our database.I've created this directly from the ComboBox's datasource creator in the Design view.Various bits of code created in the designer include:
What I've done in the first stage of developing this feature is to show my users a ComboBox showing a specific subset of the customer list by applying a filter to the BindingSource.
What I want to do on a second pass is to allow the users to type a specific bit of information into a textbox and check whether it appears in Me.CustomerDataSet like so:
Dim x As IEnumerable(Of CustomerDataSet.customerRow) = From cust In Me.CustomerDataSet.customer Where cust.custno.Trim = "test"
If x.Count <> 0 Then
At this point, I have a customerRow object. I want to check whether this customerRow object appears in the list presented to users in Me.ComboBox_Customers via the filtered Me.CustomerBindingSource. Me.CustomerBindingSource does not (directly) contain customerRow objects, it contains Object objects.How do I find out whether Me.CustomerBindingSource contains the customerRow object at whatever lower level?Also Once I've determined that Me.CustomerBindingSource contains the item, how do I select that entry in the ComboBox?
I have a datagridview bounded to a bindingsource (that is, in turn, bounded to a dataset that is the data origin of the project) and a bindingnavigator to a Access table, all of this done with the visual designer of Visual Basic .net 2005. I want to print in a crystal report the rows shown in the datagridview after filtered using the .filter property of the datagridview. But, to achieve this, I need to get the filtered rows in a dataset, and I havenīt got this in any way. If I pass to the crystal report the main dataset origin of the project, it will print all the rows, not only the filtered rows. I would have figured out that there would be a .getfilteredrows or something like that in the bindingsource object, but there isnīt. I managed to get this manually, through a loop, but I canīt believe it is the solution experts use.
I'm using a bindingsource to bind a dataset to a datagridview. Normally I would use a dataview to sort and filter the data, but since a bindingsource can also do this, I figured I would not need a dataview anymore. But I'm not sure how to get certain data from the filtered source. I know I can get it from the datagridview, but I'm not loading the entire dataset into the datagridview. I guess I could and then just make the columns I don't need be invisible. Or I could go ahead and use a dataview also, but that seems redundant. I was wondering if there is an equivalent to this code to get a specific item from a dataview, but pulling it from the bindingsource:
tbCode.Text = dv.Item(m_recno).Item("CodeNo")
As long as I'm not filtering the data, I can get it from the dataset, but when it's filtered, the indexes won't match.
A brief about the foundation of the program: I have created a VB2010 Windows Form application that connects to a Microsoft Access database. A datagridview is used to show all the data of the database. Then, a filter is used to filter the dataview (the BindingSource actually) and show the filtered db's data.
Let's say this is how I filter my BindingSource:
MyBindingSource.Filter = " price > '110' "
This would cause the dataGridView to filter the data (correctly), and let's say 10 rows are now displayed. What I am trying to do now is to get the sum of the values of one column of these new data. For example each of the 10 rows have a 'price' column which contains a double value. I would need the sum of these *filtered* values.
I found on the Internet that I may be able to transform the BindingSource into a DataTable and I could, but now I don't know how to access the values inside this!
I am trying to create a spreadsheet based on a filtered Dataset. The problem is I cannot connect to XL. I get the following error: Warning1Namespace or type specified in the Imports 'Microsoft.office.interop' doesn't contain any public member or cannot be found. Make sure the namespace or the type is defined and contains at least one public member. Make sure the imported element name doesn't use any aliases.
From these lines of Imports Microsoft.office.interop Imports Excel = Microsoft.office.interop.excel
Another issue is I only have XL 2000, and I won't be able to get 2003 anytime soon. 2003 is what the target computer is using. I would like to develop the app with 2000 and make the appropriate changes to 2003 when I get upgraded. I couldn't get any information on the 2000 PIA here: [URL]. After reading this: [URL] it almost seems like I don't need the 2000 PIA. Many of the techniques described in this document involve the use of IAs for the Office applications.
For Office 97 and Office 2000, you can autogenerate these IAs using TlbImp. Office XP includes pregenerated (and optimized) IAs that you should use instead of autogenerating IAs. An IA distributed by the owner of the original COM server is called a primary interop assembly (PIA). You should always use the specific version of the IA that matches the version of Office you're targeting. I just want to develop the app. Then I can download the 2003 PIA, right? I would use this: [URL].
here is what i'm stuck with i have datagridview and datasource is dataset. Everything is fine no problem.
It has 3 coloumns, ID, Name, City. ID is PK Now I have rowfilter on dataset like this
dataset.tables(0).defaultview.rowfilter = "Name Like '" + txtName.text + "%'" everything is fine till here. it show selected records. now, i have another text box on form which ask for id and search id in datagrid like this dim dr as datarow = dataset.tables(0).findbyid(cint(txtId.text)
in above case if id found then it will dr with row. which is fine. the question is how i can find if current row is in list or not because of filter on dataset.table
I have a Windows Form application with a form that has an underlying data set. When the users click a particular button, the code clears some fields on the form but also is suppose to update a value in the underlying dataset on a field that is NOT displayed on the form.
In VB6 and VBA this is very easy to do. I simply says Forms!formname!NameOfUnderlyingFieldNotshown and pass it the value. How do I do this in VB.net with a Windows Form and underlying dataset?
I'm currently working with a gridview that has a huge underlying dataset.I'm almost certain that I saw something about a new facility in Visual Studio 2010/.NET 4, which would improve the performance (e.g. doesn't download all the data on databind, but rather only what data required for current page). My guess would be that it was using AJAX.I didn't need it at the time I saw it, and now I can't find it, even though I've been hunting online for a while.
find the underlying DataGridView (DGV) when responding to a Right Click on a ToolStripMenu (TSM).I have several DGV's all using the same ContextMenuStrip (CMS) [DGV.ContextMenuStrip=CMS]I have six ToolStripMenuItems under the CMS. I thought I could just add a unique handler for each of the ToolStripMenuItems and be a happy camper on each Right Click...But I cannot figure a way to decode the underlying DGV. There doesn't seem to be any relationships between DGV and TSM and none between CMS and TSM.Is this path a dead end? If so how should one do it? FYI my DGV data is unbounded.
I want to find a particular ID in a DataTable, I am using a DataView to filter the results, but how do I know which row in the original table the filter view corresponds to? Any ideas? In know I could use LINQ but I don't think this would help either?
i have a strongly typed DataSet that haves these two tables:
AUTHORS ID Name and
[code]....
Somewhere my system haves a function that returns a DataSet with the books of a certain subject and all the Authors that wrote such books.I need to show the book's attributes in some textboxes inside a Form. I use a BindingSource to display the ISBN, Name and Subject of the books in a textbox, yet I don't know how to display the author name of the book I am currently viewing in a TextBox, taking into account I already fetched the Author into the DataSet.
Its pretty much the Child/Parent display problem somewhere discussed in the codebank, but kinda backwards, the thing is that I;m navigating through the CHILD records here, not the parent, yet i have all the data needed in my Dataset.
I am attemting to read a .txt file database into an xml file and then read the xml file into a DataSet and then bind the dataset to bindingSources and then subsequently bind comboboxes and text boxes to the binding source. I am struggling with how to create bindingsources with different filters. I am not sure if I am even going about this the right way. Perhaps there is a better way. I already have the program working using traditional OLEDB and creating different datatables but I wanted to be able to add and edit my datafile so I decided to convert it to a xml file.
HTML If Me.OpenFileDialog2.ShowDialog() = Windows.Forms.DialogResult.OK Then With OpenFileDialog2 folderName = .FileName.Substring(0, .FileName.LastIndexOf("")) 'fill dataset with selected xml table [Code] .....
I would like to get the Type of item that a BindingSource is hooked up to or configured for. The BindingSource.DataSource property can be set to an object, list, or type. If it is a Type, it obviously does not have a bound item yet, but I would still like to get the Type. For a List, I need the item Type, not the list type.
I currently have a custom list type for business objects that implement an IListItemType interface, that I created to solve this problem a while back. I would now like to get this working in a more generic fashion so that it will work with any list.
I've looked through the API docs for for a good way to do this, but so far I have not had any luck. Am I missing something or is this just something I can not or should not be doing?
I am creating an application using an Access database and the DataSet, BindingSource and TableAdapter to connect to my database, but I need to able to switch between different databases with the same tables, but new name and path. So I will need to set a new
use dataset , bindingsource and table adabter to filter or serch on database and update the datagridview
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load 'TODO: This line of code loads data into the 'Database3DataSet1.Table3' table. You can
I'm trying to use the bindingsource.find method to match a datarow column with a user entered text. I know that using BindingSource1.find("columnName", searchString) will work when the user enters the exact string. What I would like to know is how to find a row that is close to the string using a wildcard search... a good example I guess is:dim searchString as string = textbox1.text 'lets say the user enter "se"dim index as integer = myBindingSource.find("columnName", searchString) 'I would like to find the firs record that starts with "se"I can achieve the idea using the bindingsource.filter method but this will interfere with other parts of my application if the bindingsource is changed.
In my application, I have a single table. Two of the fields in the table are COUNTY and CATNUM. Both are string.
I want to perform a FIND on both fields. I have no problem doing the search on CATNUM alone IF I set a FILTER first. Due to the size of the table, it takes a few seconds to set the filter. Once the filter is set, .FIND works quickly.
The customer has the option of setting a filter to work on one COUNTRY at a time. If they choose to do so, no problem.
If they don't have a filter set and they are using the entire table, then when the customer wants to search for a COUNTRY & CATNUM, I present a list of COUNTRIES in the table and a textbox for them to input the CATNUM.
Now I have the COUNRTY and CATNUM - how do I do the FIND? I already know that I can FILTER the table by COUNTRY then do the find but as I said before, it takes too long for the filter to be set (in my mind anyway!).
For a WinForms VB.Net application, I use the Bindingsource's filtering capacity to filter data, which is seen in a DataGridview. The BindingSource is from a DataSet, created using the Designer, and the data comes from a Access DB, using JetEngine and .Net 3.5. So basically:
This filtering works fine, however, now I included some extra columns in the DataGridView, which I'd like to filter on, too. Of course, when I feed the manually added columns to the Filter of the BindingSource, this doesn't work out.I've done some research, and was not able to find any way to use the BindingSource's filtering syntax on the DataGridview. I'd like to use this syntax though, as I designed quite a nice UserControl and class around it, to provide smooth, fast and simple filtering capabilities.
I have a bindingsource that is connected to a table where tho fields determine uniqueness. During a refresh I would like to return to the row that the user was on when he clicked the refresh button. BindingSource.find only supports one column in so far as i have been able to infer. So how doi do it. Altering the table is out of the question. Besides searching on multiple fields is a common event. Like for example first and lastname or perhaps company and journal number.
i am trying to locate the id of a field using the binding source, if i type the full id, it is locating it successfully no problem, but that is not what i want, i want to type 3 digits of the end of the id and be able to still locate that record. i triedusing wildcards with it "%" with no success any suggestions?
Private Sub btnRPSearch_Click(sender As System.Object, e As System.EventArgs) Handles btnRPSearch.Click Dim currentRecord As String = RprAuthNumTextBox.Text
I want to search my db for the value abcd, so I wrote this Private Sub Button1_Click_2(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click MessageBox.Show(Me.Table_0BindingSource.Find("Hash", "abcd")) End Sub
but I keep getting -1 even if there is no data that matches what I want to search.
I've got a BindingSource for a DataSet. I'm fairly new to this whole binding business and databases, and it took me hours to figure out how to use BindingSource to get to an item, because the Row method was not included in the autocomplete. Not to confuse anyone, here's some sample code:[code]The code runs perfectly and does exactly what I want. My problem is the following: When I've typed in source.Item(0)., autocomplete does not display Row in the list. Is this perhaps not the best way to do what I'm doing? Is there a reason it's hidden? Is this a good coding practice to do so? The fact that is wasn't there took me lots of time Googling, so I'm trying to figure out whether it's a Visual Studio glitch or my own.
[Code] Somewhere my system haves a function that returns a DataSet with the books of a certain subject and all the Authors that wrote such books. I need to show the book's attributes in some textboxes inside a Form. I use a BindingSource to display the ISBN, Name and Subject of the books in a textbox, yet I don't know how to display the author name of the book I am currently viewing in a TextBox, taking into account I already fetched the Author into the DataSet.
Its pretty much the Child/Parent display problem somewhere discussed in the codebank, but kinda backwards, the thing is that I;m navigating through the CHILD records here, not the parent, yet i have all the data needed in my Dataset.
Am new to VB, can anyone tell me very simple how to share the MAIN Bindingsource with an detail form where i want to edit 1 record from the main datasource? andreg
I want to search particular item in Binding Source for which i use BindingSource.Find() method, but it throws an exception "This operation requires an IBindingList". My binding source is bind to a .net class object.. I searched over the internet, but could not find the clear solution to achieve this task. The sample class code is given below:
Imports System.ComponentModel Public Class Department Private _code As Long
I'm binding a DataGridView to a BindingSource to a LINQ IEnumerable, I found that the BindingSource.Find method throws an exception because .Find isn't implemented in IEnumerable (and the BindingSource just passes the call to it's DataSource). I need to use BindingSource.Find to select/highlight a particular row in the DataGridView.
Is there a feasable way to extend my DataContext to support this behavior w/o breaking anything else? I expected to find the code out there already, but I've searched exaustively with no luck.Without it, I cannot "move" the BindingSource using .Position and that's a pretty common use of the BindingSource I think.
If TableAdapter.Fill(DataSet, "Customer") populates all of the boxes: How can I "unpopulate" of all the boxes and break any open ties to the dataset/tableadapter/bindingsource/etc.?
