Forms :: Resolved Search And Display ArrayList Stored In A Hashtable?
Mar 25, 2009
I am new to VB.net and I am trying to work out an exercise from a book I am reading on VB. Basically I am storing some book information in a hashtable using a class called Book to store the book information. I am trying to work out my Search and Display All procedures. My Search will work for the first value in my arraylist but not for any other values. I even added the ISBN to my book class to try and use this as a search point. The ISBN is used to pull the item from the hashtable as well.
In the main code I am having problems with the ButtonSearch and ButtonAll.
I have 2 forms in my visual basic 2010 project. Both are connected with an SQL 2008 Server where i keep a db with customers records(name,surname,address, etc).What i want to do is to give certain criteria in the first form, lets say name,and hit a search button. The program should search the db if the specified name exists.If it exists i want to show the results in the second form.By results i mean the name , surname, address,etc. If it does not exist i want to prompt the user to insert data into the db.The problem is that i know how to do this work in a single form but not how to make the two forms "communicate" with each other (meaning that one does the search and the other the projection-adding part).
Edit:I tried setting the filters but all i get is errors. I will post whatever i have written so far in case someone can help me out. So here it is.As i stated earlier i know how to search for the data in a single form(lets call it DisplayForm). As Olivier mentioned i have textboxes for the records, a combo box with the search criteria(name , surname,id) and a Search button that perfoms the search and populates the text boxes. The code for the search button is this:
Private Sub btnSearch_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSearch.Click Dim intPosition As Integer 'Combo box code Select Case cboField.SelectedIndex
[code]....
I want this procedure be done in a second form (lets call it FormSearch) and populate the textboxes in form DisplayForm.
I was using the For Each frm as From In Application.OpenForms but it seemed a bit inefficient to loop thru every open form when I already knew what I was looking for. After some googling I found some information about hashtables so I used the following code. This code works as long as another form, say form3, isn't open with the same ID. What I am trying to figure out is, why is the hsh.contains only looking at the key instead of looking at the key/value pair?
Form1 Public hsh as New HashTable Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
I've been searching around for ages now but can't seem to find what I'm looking for, anyway came accross this wonderful place so thought ay I'm creating a rewards system for school where pupil earn points for good behavior which they can then use to purchase things like a packet of pens. (They can also have points deducted for bad behavior)
my application has "picked up" the old style button design. In Vista the buttons have a slight shadow / 3d effect, however, my application appears not be using the default style and instead applying the older XP, Win98 typ appearance. At first it didnt bother me, however, not its annoying and rather than rip all my code out and apply it to a new project, i would prefer to remove the offending code call.
Its a long shot, but i thought i would see if anyone here knew what might be causing it?
I create thousands of this class and save them in an ArrayList. How can I use ArrayList.IndexOf to search for a member (ID in my case).
Should I create an ArrayList for each member and increase them together then use ArrayList.IndexOf with one of them and use the returning index to get the other values from the other arrays?
I have a arraylist with objects from a Product class. This class as properties like Name, Price, ID ...The ID property is a unique identifier for each object.how to search the object with ID=100
I have an ArrayList, and i wish to search it for a specific part of a string. Like the InStr() function.I can only find the WHOLE string. The ArrayList has strings like "This=Is A String", so if i do a check with ArrayList.Contains. It will only search for the whole string, and not something IN the string. Perhaps i need something like Starts With .
Code: dim wordArr as New ArrayList Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click If wordArr.Contains(TextBox1.Text) Then
I have a puzzleing situation where only 120 of 151 colors defined in ColorList(i) display.
In the following code, btnsetup_click assigns 151 colors to a matrix of rectangles in a picture box. When 1 of these rectangles is clicked, it assigns the color to btnPen or btnBrush, depending on a left or right mouse click. Hovering over the rectangle displays the name of the color in label 'ColorOver'.
This all works fine except only the colors 0 to 119 from the array are actually displayed in the picture box. Yet, if I hover or click over the missing colors, the color name is displayed and the button is assigned the color that should be displayed.
Dim ts As Integer = 25 'sides of toolbox squares Dim tc As Integer = 24 'Tool columns Private Sub btnSetup_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSetup.Click
I want to access each entered element in an textbox as an index in ArrayList. But, the problem is that whenever I enter value in the textbox, it stores all the values in single arraylist index.
I am developing a complicated search form, and I would like to know best method of passing search criteria to stored procedures.Possible options that I know are, 1) Create sql statements in Visual Basic and send statements to SP as strings to execute2) Pass search fields to stored procedure and build command in SP (Stored procedure) in database?
I've written a Windows application which reads the title of a Window (which is in Greek) and adds it in an Array List. However, when I MessageBox.Show(thatString) it appears as '?????'.
I'm writing a tabbed web browser for someone who is learning VB.NET, and I have got to the point where I can add/remove browser controls into tab pages, controlled by one set of buttons on the main form, but I can't handle events from the WebBrowser objects.I have tried this but it says that 'DocumentTitleChanged' isnt an event of 'Control'...
Dim browser As New ArrayList browser.Add(New WebBrowser) browser(0).parent = TabControl1.SelectedTab browser(0).dock = DockStyle.Fill AddHandler browser(0).DocumentTitleChanged, TitleChangedHandler()
I want to update the tab title with the web page title when it changes. I started using a timer to update the tabs but there must be a way to add an event handler here.
I am using SSMS 2008 and VB. I'm a novice VB developer. I am trying to display results of a simple stored proc on my ASPX page. But I get the error below. Here is my code behind for the ASPX page:
What I am doing is iterating through all the groups that belong to the top group (Generic reports). Then I take advantage of the GroupPrincipal.GetMembers(True) which will recurse through a given group name. I test to see if the user exits under that group and if true I put the group name in an arraylist.
I use the for each principal in GroupPrincipal.GetMembers to loop through each returned user to see if they exist.
Is there a way to put all the returned users Principal.Name from a given group in GroupPrincipal.GetMembers into an ArrayList? This would allow me to to use Arraylist1.IndexOf to search for user. Which would be much faster then iterating through a returned list using the for each construct.
Sub RetAllMbrs(strUser As String) Dim oPC As PrincipalContext = GetPrincipalContext() '<- this is function somewhere else in the code
I'm using a DataReader to display informations stored in a table.I created Two button to go to next record and to go back. [code] In ASP.NET I didn't find a way to do like it, because DataReader hasn't the EOF property.How can I convert this last code (VB6) to ASP.NET ??
I want to display a string (stored in a variable) in notepad(or any other default text editor depending upon the system). Saving to a text file is not necessary. I just want to open Notepad with an unsaved file containing the text. Please help
How would I use a value from an output parameter from a stored procedure in a vb 2005 application. I would like to capture a run date from the procedure and show it on several forms in the app.
I have my requiremnt as follows. I have a database consisting of text, image columns. Now I would like to query the database and display the result on to a word document. I have that resultset in a dataset. Now I would like the result in paragraphs manner in word document.
I have a very specifically designed table in a .aspx page. I have an <asp:SqlDataSource> tag that works fine with a DetailsView. I have tried DetailsView, ListView, Gridview etc. and cannot obtain the desired design. Is it possible to execute a Stored Procedure and have the individual results displayed in the individual cells of a web page table? This seems like it should be simple but it apparently is not.
I am in need of being able to show a user the contents of a Oracle stored procedure. I have no idea of how to go about actually getting and then displaying the code contained in a stored procedure. Does anyone know of a way? I know how to call and execute a stored procedure but is about it. I am developing using VB.NET 2010 with Oracle 10G as my back end.
I have an arraylist (arrFirstArry) which I use to populate another arraylist (arrNoDuplicates) preventing any duplicates from being added. This works fine. What I would also like my code to do is prevent adding any partial values which may exist from being added. i.e. my array is like this
I have two structures Public Structure myResearchData
Public batchName As String Public arraylistRData As ArrayList End Structure Public Structure myResearchSubData Public researchDescription As String
[Code]...
Cleared MyResearchData.arraylistRData for new data to be put in but it also clears the arraylist inside MyResearchDataAList and didn't old the contents of the arraylist
What I need to do is read an ArrayList in My.Settings and add another ArrayList to it. The first think I'm trying to do is load My.Settings.Records into myArrayList. I'm not quite sure on the proper way to do this. I've tried things such as Dim myArrayList As ArrayList = My.Settings.Records, I'm not sure if I need New and I'm not sure if I need .Clone or .CopyTo.
Then I have another ArrayList myArrayList2. To get this into myArrayList I've done: [Code] Then to save it back to My.Settings I've done. My.Settings.Records = myArrayList. The problem is I keep on getting Object reference not set to an instance of an object error on the AddRange line. My.Settings.Records is definitely an ArrayList and it will sometimes = Nothing. The objects will only ever be strings.
The Intranet was done with forms authentication and stored in a SQL database. how I go about (if possible) authenticating a login in a vb.net project that queries the user settings from the ASP.Net database that was created on the SQL server for the forms Authentication.
