Disable Some Items From The Table By Setting A Value In The Table?
Dec 7, 2011
I have a combobox that retrieves data from a database. Occassionally i have to disable some items from the table by setting a value in the table so that item is not available in the dropdown for users. I do this through my SQL query i.e.SELECT * FROM TABLE WHERE ADDITEMTODROPDOWN=1
When i have the DropDownStyle set to normal (dropdown) and the application loads the dropdown shows the item from the database which is no longer available for users to select (the item is set to disabled or this is fine and is what im after. I then change the DropDownStyle to DropDownList to make it look like a button so users cannot enter their own items. As soon as i load the form with the combobox the item that i disabled no longer appears as the original text.
each of the ToolStripMenuItems has more than 20 ChildItems and each of these ChildItems have more than 30 ChildItems.In my form I havea login form and each user must log in.I want to know that how can I check my UserAccess Table with these MenuItems and ChildItems names and if the user does not have the MenuItem or ChildItem name in UserAccess Table, the MenuItem or ChildItem must be disabled.
Register product table consist of (Product Id (txtProdId.text) and Product Name(txtProdName.text)) NB. All are textboxes Sell product table consist of (Product Name(cboProdName.text) and ProdPrice (txtProdCost.text)). NB. ProductName over here is a combobox.
When someone saves record in the Register product table, items should be added into the combobox into Sell product table.
I have a data table whose one column is related to a column of another table. I have a listbox in a form which shows a column (which is sorted by another column value by ORDER clause) of the parent table and other columns are in textboxes. The child table is represented by a datagrid. When I add a new item in parent table and click save, the newly created item is listed at the bottom of the listbox violating my ORDER clause. When I wrote some codes to fill data again after updating, it shows an error message[code]...
How to use SqlTransaction in .net 2.0 so that when I start reading data from a table, that table is blocked for others (other programs) to read/write to that table? If SqlTransaction is not a good option, than what is?
I have a project that I used the 'Connect to Database' tool to set all the bindings and table adapters, etc. Currently the database is housed in the same directory as the exe. I was asked if I could have the database location be a dynamic value. My question is when you set up a project to work with a database using the 'Connect to Database' tool, how can you change its location?
I found this setting: ASRDBConnectionString But its read only. Within that setting is text that says: DataDirectory So thought that might be a variable to change somewhere....but can't find it.
Im pretty use to doing loops (although still relative new to vb) in my code however am having difficulty setting up one that picks up an entry in one data table and then sums a field in another where records have matching criteria. Example:
[Code]...
What i am trying to do is set up a datagridview on a form that shows the summary data. The time is controlled on the form by a trackbar (output to textbox) and I started setting up a loop using (For/Next) to isolate firstly the matching entries in field 3 (time). This works fine. I then used compute to sum the the field 2. However what i want to do is to loop through table 2 and where entries match i.e. where Field 1 in table 2="A" sum matching entries in table 1 where the DateTime matches.
I have 22 item in combobox which i want place in one table. Why the code below do not work? [Code] I try learn database program but the code add first combobox item 22 times! What wrong with concept I use?
I have a small requirement in VB.NET and that is to fill an array with values retrieved from a table. That is I have a table called "user_roles" and that is having columns called "role_id" and "role_name". In the load event of the form, i want to execute a procedure and populate all the items (role_id) from the table "user_roles" into an array.
I have a table of data exported to an Excel file that contains a Date/Time Field. The entries in the table are formatted like 01/01/2009 14:00 (military time). Every line in the table contains unique information that is specific to that particular date/time information, 1800 lines of data (the reason that I dont want to hand sort this table). How can I identify the items in the table that fall after a particular time of day? More specifically, I need to identify which of the data fields have a time after 14:00 on that particular day.
I have squiz my mind out for this but no luck I have a Windows Form with a list box that gets data from a MS access Database table(table1).The table fields are NAME,SURNAME,AREA.In the list box i see the recors of AREA(for example:NY,Chicago,L,...).I want to do this,when a user selects a item from the listview and click OK Button to open a new form with the selected records(with all the table fields).How can i do this
I am currently using microsoft access 2007 and vb.net 2008. The problem senario is this: I have a database-table that contains two columns, items, and the price of each item. I tried to drag this table to the form as a checkbox tool, but only one checkbox1 was diplayed. The table consists of four rows. My requirement is when I drag the checkbox I want to see the all items in the first column, i.e. four checkboxes that hold the same name as in the table in the database, and when I check one or more items to be able to use, in somehow, the price(s) to make some kind of calculations.
In .NET development and don't really know what to use to do some specific actions. I'm also a newbie in AJAX/JavaScript development. I'm using the mvc3.
I'll have to implement a few things : -rating systems with 5 stars -classification of items that are listed inside a table. (e.g. : I want all the people that are older than 20) -searching inside the whole database (e.g. : I want everything that contains the word "tennis", so, it should give me a table with all the people tha play tennis, than a table with the clubs were people play tennis,...). -a kind of intellisense (e.g. I add a new person inside the database, and for the field "club", I just want to write the first lettes of the club, and then, I would just have to click on the club to fullfil the field).
I've found plenty of websites that give me a library with some of the things that I need. But, I don't know which one I should choose.
I do need something that is as simple as possible, with examples for razor (I'm using VB.net, but it doesn't matter if it's in c#). If possible, having nothing to install could be great (I know that the Jquery scripts that are installed by default are already great).
Let's say, I have something like a table in the WebBrowser component, it's not actually a table, because the data organized in flash, but, it's organized like a table, it has like rows and columns. You can see more in the attached file. Can I transform this text organized as table into DataGridView or some another tool that serves as table. like_a_table.JPG
I have a large form that is set up from master-detail datasets in Visual Studio 2008.I havene master table with a large amount of detail tables. Several of the detail tables also have detail tables linked.Now I need to add a master table that sits on top of my existing master table making it a detail table.
I have a login form that consists of 2 text boxes: txtUser, txtPass. Now these are not bound to any data table & I don't what them to be bound. When a new user enters his user name & password, I want to add these on a data table that has two columns: User, Pass. Data table information: Data Source = Login.accdb, Data table = LoginTable, Connection = LoginCn. I use visual basic 2010. So how do I do this?
I created a function that creates a global temporary table to stage data from a excel sheet I need the table to persist for me to map the columns using a form. The table is still there when the code goes back to the sub that calls the function until I call the form where I do the mapping. I am trying to avoid create/drop table scenario with a perm stage table.How can I get this table to persist until the data gets loaded into the perm table?
I have this code to edit the datarow of my table adapter but t doesnt update the table. I think i have a missing code that's why but i cant figured it out. by the way im using vb2008 and SQL as my database. [code]
I have a database that has two tables in it. One is a table of items (table1) and the other is the table of current items (table2).On form load I need to generate a random amount of the items from table1 and populate table2 with them. I was trying to do something like this:
I currently have this working already for one of my combo box's, but when i try to use the same code i get this error ''There is no row at position 6.'' . The are 2 fields in the table asset_type_id, asset_type_name', im trying to dispaly the values in a combo box for the field 'asset_type_name.
the code for ' Friend Sub RetrieveCustomerInformation2()' works but the other friend sub throws the error. Imports System.Data.SqlClient Imports System.Data Imports System Imports System.Data.OleDb
I have a query that I have to run that requires me to get rows from a table based on the value of a field in another table (which I have gotten earlier). I currently have it done like this (simplified).
I have a project which contains a large number of lookup tables, and I have all of these lookup tables represented in a single typed DataSet, which contains TableAdapters for each lookup. I've designed an editor for these lookup tables, which should allow editing of one of these at a time. My front-end is written in VB and WinForms, the back-end is a SOAP web service; I can successfully pass the changes to the DataSet back to the web service, but can't find a way to use a TableAdapter to update the single table that has been changed.
What I'm trying to do is instantiate the appropriate TableAdapter for the updated DataTable by sending the name of the table back to the web service along with the DataSet, then referring to the TableAdapter with a dynamic name. The normal way to instantiate a TableAdapter is this:
Dim ta As New dsLookupsTableAdapters.tlkpMyTableTableAdapter
What I'd like to do is this, but of course it doesn't work:
strTableName = "tlkpMyTable" Dim ta As New dsLookupsTableAdapters(strTableName & "TableAdapter")
Is there any way to achieve this, or am I taking the wrong approach altogether? My other alternative is to write separate code for each table, which I'd prefer to avoid!
An unhandled exception of type 'System.InvalidOperationException' occurred in system.windows.forms.dllerror in line: dbAdp.Update(dbDset) in btnSave_Click, (elseif editflag = true) blockdescription: Update unable to find TableMapping['Table'] or DataTable 'Table'I was also wondering if I could simply use the ExecuteNonQuery for the delete statement, but since I've placed my data in a datarow, I'm not sure if i can actually use it. Any thoughts on this? Btw, this is my first time using a datarow, and I've recently been studying how to use ADO.net.
dr = dbDset.Tables(0).Rows(CurIndex) dr.Delete() dbAdp.Update(dbDset.Tables("addresses"))
I have two tables Employees and CafeLogs. Some employees can be cashiers and also customers at the Cafe shop.
Table structures:
Employees: EmployeeId(PK) , FirstName, LastName CafeLogs: LogId (PK), CashierId, EmployeeId, Value, => CashierId and EmployeeId are the data from column EmployeeId of Empoyee table
Table relationship:
Employees 1:N CafeLogs (CashierId (FK))
[code]....
Right now I know how to select only LogId, Employee's name, and , Value, not with Cashier name yet.
Dim query = From log In db.CafeLogs _ Join emp In db.Employees On emp.EmployeeId Equals log.EmployeeId _ Select log.LogId, emp.FirsName, emp.LastName, log.Value
