I am doing a project for a course that involves a database, i have it set up already so that i can have two different labels displaying data from two different fields in a table when the form loads, but i am trying to get it so that when i click an option in a listbox it will change the displayed information. I am using the following code to set it when the form loads:[code]
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[Code] The above code does not work. I need for this to check to see if there is a database entry with the office name and today's date. Then if not it needs to tell the user that it is going to create a new entry for todays date. Then the code is trying to enter a new row in the database but it is like i can't use command. commandtext = in two spots. Both SQL commands work if separated but not together in this code. Obviously the abcdefghij are just test entries but it works if it is separated from the other sql command above. Also of course i have changed the datasource above to hide mine.
View 2 RepliesLIKE in SQL query in CommandText Here's my
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I have created an SQL query using Query Designer in VB.NET 2005. The commandtext for the query is somthing like SELECT * FROM tablename WHERE Field1=@Parameter1. I want to change this at run time to something like SELECT * FROM tablename WHERE Field1=@Parameter1 AND Field2=@Parameter2
View 4 RepliesWhat is wrong with this code?When the code runs cmd.ExecuteReader I get an error saying "Incorrect syntax near the keyword 'AS'".I'm assuming I didn't breakup the sentence correctly.
Using cnn As New SqlClient.SqlConnection(clsDBConn.clsDBConnections.prpConnString)
cnn.Open()
Using cmd As New SqlClient.SqlCommand[code].....
I'm trying to edit the CommandText for the Insert Command in a TableAdapter in the Designer in vb.net. Whenever I make changes to the CommandText, Visual Studio (2008) automagically changes the Parameters to a Collection consisting of one Parameter thatexisted before editing the Command, immersed in a sea of complete garbage Parameters, and then I either have to undo (unless this was the first thing I tried editing, in which case I have to close the Designer to discard changes and reopen it) or manuallychange ALL the Parameters back to something that isn't complete garbage.
View 2 RepliesI'm trying to edit the CommandText for the Insert Command in a TableAdapter in the Designer in vb.net. Whenever I make changes to the CommandText, Visual Studio (2008) automagically changes the Parameters to a Collection consisting of one Parameter that existed before editing the Command, immersed in a sea of complete garbage Parameters, and then I either have to undo (unless this was the first thing I tried editing, in which case I have to close the Designer to discard changes and reopen it) or manually change ALL the Parameters back to something that isn't complete garbage.
View 1 RepliesDear friends I am new in .net world and I am trying to display a single row to a literal. I prefer VB so my code is as follows but I'm getting the error "ExecuteReader: CommandText property has not been initialized".I also tried sqlCmd.CommandText = "getLastModificationDateTime" without the EXEC statement
View 3 Repliesi have this code in form1 at buttonpreview
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I am trying to add an order by case statement in the dbcommand.commandtext but i see that no rows are returned. I want to assign priorities for colors in the case statement. This would help me avoid create a new table to priorities and rewrite a lot of code to map the foreign key.[code]
View 2 RepliesI created a wizard dataset and add data adapters in my Dataset.i want change select commandtext when form loaded
View 1 RepliesI'm trying to create DataBindings to textbox and combobox controls on my form. Here is my code so far:
Private Sub SetBindingSources(ByVal strClientID As String)
Try
'This section of code populates the grdAddresses DataGridView
strSQL = "SELECT B.addrDesc, A.addr1, A.addr2, A.addr3, A.city, A.stateCD, A.zipCode, A.phone, A.fax "
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The highlighted line of code is returning the error message (see screenshot below). The part that I'm not sure what to code is the "dt1.addr1".
I'm try to making a text box showing a date, this what i've done
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For some reason I'm unable to set the commandtext of the tableadapter. I have the following code:
'Prepare the sqlcommand
Dim dd As System.Data.SqlClient.SqlCommand
dd = new System.Data.SqlClient.SqlCommand
dd.CommandText = SqlUsers
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In my app (written in VS 2003) I use OleDbDataAdapter's to load data. I have some functions that enable be to change the OleDbDataAdapter.SelectCommand.CommandText at run time, by adding a "WHERE" or "HAVING" section to the SQL command, or updating the "WHERE " or "HAVING" section. This way I have have generic load data functions. (load all invoices for Customer 123, load all invoices for the year 2009, or load all invoices for Customer 123 for the year 2009).
With the new VS 2008 TableAdapter, the TableAdaper.CommandCollection property is Protected. How can I edit the TableAdaper.CommandCollection(0).CommandText at run time?
this code is in the button click , i get each data out using spiltbut i encounter error at "cmd.CommandType = CommandType.Text"
Dim conn As New SqlConnection(GetConnectionString())
Dim sb As New StringBuilder(String.Empty)
Dim splitItems As String() = Nothing
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My general method up until now is I use SQLClient class along with CommandText to send SQL INSERT, UPDATE, DELETE statements dorectly to the SQL Server from the VB app. I have a function I use that will escape any special characters within any string variables. I put a lot of vb database functions in a module that all of my forms can use. When I need to pass data around I send/add arguments to functions using regular variables, etc... I log all of my SQL queries sent to the server to a log file for troubleshooting.So far this has worked well. I know there are better ways to do this, Stored Procedures for example. But I just have not made that leap yet. I'm about to consider turning my world upside down!
I'm MOSTLY interested in creating custom Classes that represent the various objects in my database (Customers, Projects, Invoices, etc...). Then defining all of the properties each of these classes should have: Customer.ID, Customer.Name, Customer.Status, etc... and would like to "map" that Customer object to the database I'm interfacing with. I figure I can wrap all of the SQL commands into methods within each class, i.e.: myCustomer.Name = "Joe Smith"
I'm having some problems with a data bound datagridview.My current scenario is the following..The itemSetup has tree properties {ItemNo, CompNo, LocNo}(compno locno are not required)I have a datagridview with a datasource list of itemSetup And this has two comboxes cboCompany that is bound to a list of company the selected value is bound to compno. cboLocation that is bound to a list of locations the selected value is bound to locno the location class requires the compno to create the list of location the problem I run in o is that the when the compno is Nothing the cboCompany throw a datagridview_ dataerror when the form is loaded en when a item is added it looks like the binding of the combox runs later then the value is set.
View 4 Replies(I used to use VB6.) I have been developing a database management program which is quite simple so far, with navigational controls, ability to delete record, datagrid, etc.
It uses databound textboxes, but when I modify the content of them it does not update the database. Same applies when I add a new record and fill in the textboxes.
I'm having trouble using DataBindings in a Windows Form / User Control. For example: Create a windows form, place a single text-box on it & place two buttons on it. The code behind the form is:
Imports System.ComponentModel
Public Class Form1
Implements System.ComponentModel.INotifyPropertyChanged
Public Event PropertyChanged(ByVal sender As Object, ByVal e As System.ComponentModel.PropertyChangedEventArgs) Implements System.ComponentModel.INotifyPropertyChanged.PropertyChanged
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If you type something into the text box & press Button1, you'll get a message box with the text of the property in it. If, however, you press Button2 (which sets the property in code) and then press Button1 again, you'll see that while the property was indeed set in the code, the text box doesn't reflect the change.
Updated the code to provide the implementation of INotifyPropertyChanged. This now works as desired.
I want all binded controls in a form or a user control have the Data Source Update Mode to OnPropertyChanged (by default they are in OnValidation).I can do that for each control in designer mode and in the DataBindings, under Advanced, change the Data Source Update Mode to OnPropertyChanged but I want to do that once for all controls.
All my controls are in a big user control, so I put before InitializeComponent() :
Me.DataBindings.DefaultDataSourceUpdateMode = DataSourceUpdateMode.OnPropertyChanged
It is not good, my controls are still in OnValidation mode (instead I force the
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I have been developing a database management program which is quite simple so far, with navigational controls, ability to delete record, datagrid, etc.
It uses databound textboxes, but when I modify the content of them it does not update the database. Same applies when I add a new record and fill in the textboxes. What do I need to do?
I wanna know a thing.I wanna know how to move into the different regs of the form (using databindings), just focusing the ID textbox and selecting ALT + => to go to right, ALT + <= to go to left, ALT + UPbutton to go to next and ALT + DOWNbutton to go behind.
View 2 RepliesHow can I change my selecommand, and keep it through the remainder of the page (when using pagination, sorting)?I have a page of checkboxes:
<input type="checkbox" name="checkbox_1" />
<input type="checkbox" name="checkbox_2" />
<input type="checkbox" name="checkbox_3" />
<asp:Button runat="server" Id="CustomButton" text="Create Report" PostBackUrl="report.aspx?"/>
Then on report.aspx I want to generate a standard listview based on the selections in the checkbox.
<asp:ListView runat="server" ID="ReportListView" DataSourceID="ReportListViewSDS">
<LayoutTemplate runat="server">
...<asp:PlaceHolder runat="server" ID="itemPlaceHolder" />...
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Will the changes i make to the sql command in the PreRender function hold when I have applied pagination or sorting to the listview?
So making a .Net site w/ VB + running off a MySQL server.
Trying to use a variable within the connectionstring to only retrieve certain data.[code]...
I have set a global variable in a module, which I then set the value in form1.I then wish to use this in form 2 in a Select Command for a dataadapter, it however says the variable is not declared although if I call it in a MsgBox on loading form2 it tells me the variable.
My code for the select is:
Me.OleDbSelectCommand1.CommandText = "SELECT Amount, [Record Number] FROM [" & _
"Test] WHERE ([Record Number] = ?)"
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I have a form with many different textboxes on it. The form is used to Edit the data already in a databound table. At design time I set my Databindings.text to the appropriate columns.
During form load I check the values in the bound column for null values. If the column value is null, I set the textbox.text property to a descriptive prompt like "enter telephone #" or enter city. I also use databinding.remove to remove the databinding so that the desriptive prompts don't wind up in the database.
Here is the code I use to remove the databinding.
For Each Panels In Me.Controls
PBox = TryCast(Panels, Panel)
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.Tag2Defaultphase is a custom property I have defined which holds the default descriptive prompt. If the user enter a value into the textbox I then wish to add the bind back so that when I updateall with the tableadapter the value will be transferred back to the appropriate bound column.
Here is my code for that:
Sub perOptionalTBoxValidation(ByRef TBControl As custTextBoxControl, ByRef strDefaultTextPhrase As String, ByRef intMaxChars As Int32, ByRef bsBindingSource As BindingSource, ByRef strColumnName As String)
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I have several controls in a winform application that I added databindings to using code.
Dim tblWrapper As ObliqueQCAndSpliceTool.TableWrapper = New ObliqueQCAndSpliceTool.TableWrapper(tbl, idField.Name)
tblWrapper.UseCVDomains = True
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When the page loads, the GridView (located in an update panel) should be loaded with my first SQL SELECT statement. On the button click, the same GridView will be loaded with new data. On startup, the GridView doesn't appear.
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I am trying to pass a variable to a SelectCommand in SqlDataSource. I have this MyIdVal that need to be passed.
Here is the code :
<form id="form1" runat="server">
<div>
<%=MyIdVal%>
</div>
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