i'm currently working on my thesis e-voting system. and i need to modify my search candidate and search voter form. the data from my database is already loaded in my listview when the system. what i want to do is while i am typing in the search text box, at the same time the items in my list view is being filtered without clicking the search button.
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im trying to do is find out the command to compare itemview items with textbox, so i dont end up with 2 of the same customers when i add a new entry, if anyone could give me some advice i would be greatful just a hobby, bold line is my problem in script, need to try and replace.
Public Class Form1
Private Sub ButtonAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ButtonAdd.Click
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I'm using this code to search a msacces db and display the data in a listview.The Search is fired after the text_changed event of a textbox. So each character is a search and also each backspace(here's where the real pain is) it will search. When I use backspace its very very slow! When I use 100 or even a 1000 records no problem but this db has 10.000 + records.Whitch event can I use to solve this problem or how can I adjust the code for faster search? ALs o when I test on a windows7 system, dualcore, 2gb memory, when I press a key it will take time before I see the character in the textboxs? Its a new system and only runs this program.I use a texbox to enter for example an artist name and a combobox where the user can choose to search on artis, title, genre etc. [code]
View 12 Repliesi have a texbox TextChange event which every time when a user hind a character in it , am querying data to my database and display that data under a datagridview control.but my data now have been grow up and still going, every time am enetering a character to the textbox is taking time to query that data and if the user type a quickly word then a lag occures to the textbox.
i have seen a lot of programs and microsoft programs that when a user is typing is not seacrhing anything unless the user stop typing .with out having any other event of focus lost or anything.can i do that also in my application with an easy way and avoid using timers or any complex way?
I am using third party tool "gridlookupedit" of DevXpress in my application. I have loaded the gridlookupedit control on the key Down event of it. Now if i type a character "A" the dropdown gets loaded with all values starting with "A". Now a step ahead i want to load the GridLookUpEdit only after two characters. for rg: the control must load values only when user types any two characters. If user types "A" it should not load. if user types "Ab" then the control should be loaded by the values starting with "Ab".
View 1 RepliesI work with an access mdb When I run the program with the following code it gives an error "Nullreference exception unhandled" "the object... is not for an example of an object..." (very free translated but you will surely recognize this)
This is my code:
Private Sub TextBox5_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox5.TextChanged
Dim dvFilter As DataView = Nothing
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I created a search and the result is displayed in a grid view. while entering the studentId in the text box all the details of the student is displayed. here its possible to retrieve all the details from the table ie here student table. now i want to filter the search ie only particular records from the table is needed. how can filter the search [Code]
View 1 RepliesI am a new one to vb 2005 and I have no idea to get the datagrid filter view option.I developed a new program which have an datagrid view.I want to filter the data based on the 3 thingsthe first one is the "dates between start and end with 2 datetimepicker controlhe Second one is 2 of the filter combo boxes.For ex: it should filter the data between the two datetimepicker
View 4 RepliesHow can i make a multiple filtering in datagrid view
View 1 RepliesI get some very generik trouble need to implement List View with Image in SubItem. All can be very fine ....But I need to use Virtual Mode. Whatever I search I haven't still found working solution's. I have found some C# code that seem's do that. But I can't convert it in VB.Net. let's explain detaly.
View 2 RepliesWell I have a list of things I want to search based on multiple points of data...for example Resolution, 3D capable, touchscreen capable....etc....What is the best way for display someone can think of & filtering results by capability, I have none of it typed out, etc...like list of objects & capabilities, etc... alreat...so it can be made any way that is thought to be good(with speed as well) for many different listings...say 1,000 of them & it filters pretty much instantly....reading capabilities & such & the list itself is easy but how can I make a filter(unchecking something brings back things, checking something takes away only since well your adding capabilities to filter selection....I have pictures that can go with items too as well as a name & more information could be given directly with the method or clicking on the picture/item.
View 13 RepliesI am using LINQ - VB.Net I want to filter my List object by passing String object in the where.
Dim _permittedTransactionCodes As List(Of String) = Nothing 'String object
it is populated with data.
Dim tap100transCodeInfos As List(Of Tap100transCodeInfo) = _dal.GetActiveTap100transCodeByHdrScreenCde(UCase(screenId), "TRAN_CDE")
i am trying something below, but not getting the filtered results
tap100transCodeInfos.Where(Function(x) _permittedTransactionCodes.Contains(x.TranCde))
I have list object and I need to check id in a comma separated string using LINQ in VB.NET, something like this:
dim strId as String = "1,2,3,5,"
dim myList = from objmylist where objmylist.id in (strId)
the VB .net experts. I added the following code and I get an error as shown below.
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When typing in Visual Studio the list of possible values returned by the Intellisense is not limited to the possible values for the type and instead lists all the items.In the example below after I type the '=' to set the default value for a property, intellisense will list hundreds of possible values instead of just the ProductTypes.Item1, ProductTypes.Item2 & ProductTypes.Item3.
View 1 RepliesI want to develop a tree view and list view form by using vb6, how to construct a tree view and list view form?
View 1 RepliesI just converted my project from VS 2005 to 2008 and started getting really bad lag only when intellisense iterates my dataset objects. The cpu maxes out one of my cores for about 2-3 seconds each time the intellisense list pops up. Is this a new feature of the 2008 ide?
View 19 Replieshow to view explorer in list view control?
View 1 RepliesI am loading a series of JPG images into an image list then using that to fill a list view. My program is using ALOT of memory by doing this. What would be the easiest way to add the images but take up less memory/time?
View 3 Repliesi want to search item A (from a list of X items) in list B but i want to get the item not found example Search ITEM A in LIST B if not found then return a print....if found continue with ITEM B..and so on.
View 5 RepliesI have added a list box and now i need help to display the data about my employees in the list box. How am i supposed to do that, do we have to put in codes or need to use that small arrow near the list box.
View 15 RepliesI have a datagridview. The database is unbounded. When I display the database in the datagridview. I want to search for a value in a datagrid view. For this I want to add a textbox. The user enters a value in a textbox. Then the search could be able to search for the value entered in the textbox in the datagrid view .
View 7 RepliesI have a Datagridview with a database attached , but I want to search the the collums by picking the collum I want from a combobox, writing in a textbox and pushing a button and the arrow in the database will move to the row if anything is found, BUT I don't know how to add the collums from the database to the combobox and do the search using the button.
View 3 RepliesMy problem is how to search any text in data grid view ?
View 3 RepliesI am just trying to search a datgrid view for any rows with a certain value in column 2 and return the value of column 3
View 21 RepliesI wanted to know if i could use vb.net (visual studio) to create an application that seaches these worksheets for a key word then returns any rowns with this key word on?
View 1 RepliesI build an application that has two forms; one gets an employee info and stores in on a txt file (I accomplished that) and the other for viewing the records and searching for a record. I'm having troubles with viewing the records one by one when I click on the "Next Record" button.
The code below is only for view form
vb.net
Imports System.IO
Public Class frmView
'Dim strFilename As String
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I created a winform that display an item master in a DataGridView, bound with a DataView. Let's just say it has columns/fieldsitem_id item_name item_description I wanted to make a single text box that will be searched in all fields. So if any field in a row contains searched item, it will be displayed. My current idea is to create a DataView with RowFilter contains all rows such
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i am trying to make a search form . i want to display the data saved in sql server in a grid view upon hiting the search button . below is the code which i am using but i am getting an error > Conversion failed when converting the varchar value 'anees' to data type int.
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Is it possible in vb.net to list view and possibly alter the contents of the ram on a computer, I presume this would have to be done through api because of the lack of access to the ram on xp +.
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