Binding - Centralized Control Of Data Forms From Toolbars
Dec 24, 2009
what I want to achive is to have a centralized control of my data-forms from my toolbars (toolstrip), like navigating (PREV-NEXT), SAVE, DELETE, CANCLE and so on instead of having it in every form. it worked beautifully in my VB6 projects. below are the codes i did in .NET and it don't seem to work and I guessed it about my use of late binding in .NET.
This is what I have done that don't seem to work. In my project module, frm is declared Public as form object Public frm as system.windows.form().form
Im my childforms i want as soon as the forms are load, activated or have focus, should instantiate or create the form object in my frm. [Code] while in my menu or main form (parent form) with toolstrip buttons, this actually where all individual forms are called. [Code]
and it's flagging an error there:
frm.CloseForm is not a member of System.Windows.Forms().Form
and I must say here that I declared all the subs im calling in the childforms PUBLIC, and of-course frm being a late binding type may not have all the Public Method on it.
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Apr 2, 2012
I'm showing an excel file in a WebBrowser control on my form, but it doesn't show any toolbars. The customers wants the ability to make changes in the control and save them, hence the need to show the standard toolbars.
I've tried many different things including:
For Each cb As CommandBar In xlApp.CommandBars
cb.Visible = True
Next
'and
[Code]....
how I can get toolbars to show in the WebBrowser control?
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Jun 6, 2010
I am upgrading my application from vb6 to vb.net.I used to populate my data in datalist control in vb6 forms. I am not finding it in vb.net windows form application. Which one control is the equivalent to it?
How can i list my data in that control?
just like: I had a table with data like id, name
I want the name should be the displayed column and id the bound column? how can i do that
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Aug 20, 2009
How would i set a toolbar on a form much like the ones a word document?
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Sep 15, 2010
I have controls on a form, bound to an SQL data source. The information populates the control well. When I change the text in a bound textbox, I want it to be reflected in the SQL database. When I change the text in the control, the DataSet is updated. Now I need to make the DataSet update the SQL table.
[Code]...
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Dec 25, 2009
I wish to add a toolbar that looks like the one in windows explorer to my windows application in my visual basic 2005 application. Although I have currently deployed the default 'toolstrip' that is avilable among the controls but I don't understand how should i change the appearance of the toolstrip from office 2003 to the one present in windows explorer.Please provide a solution to the above problem.
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Oct 15, 2010
i try to bind database to combo box but having (Object reference not set to an instance of an object) error during the running.
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Apr 21, 2009
I have a windows form that I bind to a datatable via a binding source. The binding is done in code at run time. Eg;Me.txtCode.DataBindings.Add(New System.Windows.Forms.Binding("Text", bsForm, "ToolCode", True)) (bsForm is the binding source)This works well except if the form control is hidden (I have a couple controls on the form that hold Record ID and Version numbers that the user doesn't need to see). Databinding doesn't seem to work reliably for hidden controls.
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Mar 2, 2010
This is the contents of the text file:[code]I have a combo box on a form and I want to bind some of the data from the text file, the stuff highlighted in bold, to the combo box.
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Oct 6, 2008
At work we have this really old excel spreadsheet with movable points in it.This feature no longer works in '07 so I have decided to try and make a VB form to replicate it's functionality.I have the concept down of what I'm gonna do, I'm using sliders for the movable points and I'm using a data grid view for all of the numbers they are just going to type in, and then I have a button that saves all of the data to the database that it links with.I've figured out how to get everything working except the button that saves the data. So there are 4 separate databases attached to sliders and another one that is part of the data grid view. What am I going to have to put into that button under the click event in order to make it save the values in all of these databases?
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Apr 15, 2011
I'm looking to see if anyone has a sample app or has a link to such an app that uses data binding with a grid control and textboxes and is able to insert, change and delete from a datatable which gets updated to a sql server database.I have done an app that has the grid control and the textboxes already and is able to change and delete from the datatable and that action is reflected in the grid control because it has the datatable as the binding source.
The problem I'm having is when the user tries to insert into the datatable I get a concurrency violation error when using the .Update statement to save the changes to the database. This is happening because I don't know exactly how to get those inserts synchronised correcly.I'm sure I'm also doing the processing wrong but here is what I'm doing.When the user clicks an insert button I insert a new row into the datatable. The user now has the ability to enter text into the textboxes. When the user is finished doing that the user can click the save button which issues a .Update statement. That's where the error is displayed
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Jul 27, 2011
I have a user control with its own context menu, however I need to add additional items to that menu.
The approach I took was to have a dependency property called ContextMenuItems:
Public Shared ReadOnly ContextMenuItemsProperty As DependencyProperty = DependencyProperty.Register("ContextMenuItems", GetType(ObservableCollection(Of MenuItem)), GetType(SmartDataControl), New FrameworkPropertyMetadata(New
[Code].....
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Jan 27, 2011
Normally, when populating controls with data from a database I create a connection and then pass a SQL statement to create a DataReader. I then loop through the DataReader and populate the controls. Because I am creating the SQL statement on the fly I can query the database joining on multiple tables to get just the columns and rows I need.
Now I'm trying to use the Data Repeater control in VS 2010. The Data Repeater is part of the Visual Basic Power Pack add on. If you don't have it, it is similar to the Data Grid. I've never used the data grid because I found it lacking. I need more control on how to display the data. The data repeater seems as though it will work in this particular instance.
So, following the numerous on-line tutorials I created a new data source and a new dataset using the wizards. I pointed the dataset to a table in my data source and then bound the dataset to the data repeater. It works but the dataset is bound to a table. I can think of very few instances where I would need to dump the data from a table on to form. I need to be able to query the table.
I need to be able to pass a SQL statement to the dataset at run-time. It needs to be able to retain the bindings to the controls or I need to be able to bind the controls at run-time. No property jumps out at me for changing the dataset SQL statement at run-time. I can't see how to bind controls on the data repeater at time time. I can bind a data set to a data repeater at run-time, but I can figure out how to bind the controls to the dataset fields at run-time.
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Jun 4, 2011
I am developing a software which will connect to a SQL SERVER situated at Head Quarters over a VPN connection.But for times when VPN is disconnected I want my applications at the branches to connect to a local Sql Server installed at a local server.Now all the applications at each of the local machines have their connectionstring stored in their App.config file.When the VPN is disconnected we have to change each of the connection strings on all the applications in each machine. Is there a way to do it automatically switch the connection string depending on whether the Server is reachable or not, and to store the connectionstring at centralised location.
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Jan 28, 2009
Definitely data repeater is a very nice control. I can't remove the border of the data repeater control.It appears black by default. how to remove the border of the data repeater? I am using data repeater in my c# windows based application.
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May 13, 2009
I have a NumericUpDown control with a range of 10-50 and I want to have the selected number be multiplied by an amount of money to create yearly cost. I dont know, however, how to use inputted data from the NumericUpDown control in a statement because I cannot convert it to Integer and I also dont know how to call in the data even if a number is selected.
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Jun 22, 2009
for my vb project, i have to develop a system for a network environment. it means a central database to the application. i don't know how to do that. i am hoping to do a sql database. guyz please help me to do this.if you have any tutorials or any of your advices, will help me a lot.
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May 17, 2009
I want to run a VB.NET desktop application with Centralized MS SQL DB server over internet at more than 72 outlets.The application should be able to run with the local MS SQL database if the internet connection fails. Once the internet connection resumes the local database should do the incremental updates on the centralized server and go live with it.
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Mar 20, 2009
I am using visual basic dotnet 2008 .I am in need of validating the controls in my forms. but the validation code should not be created for each form , so how to validate the textbox from a centralized code,
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Nov 28, 2010
I want to connect a database that is located on centralized server. How can I use a windows form VB.NET application to access it? Is this possible?
How can I maintain a single user entry (e.x== used of INSERT command)?
Are both of the above things possible? If so, how can I go about implementing them?
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Jul 2, 2009
If I load a datatable, and then set a listbox properties pointing to it, I get the right data, e.g.:
[code]...
I get System.Data.DataRowView instead of my actual data.I don't understand how the databinding is actual happening, and how I refresh my the data in the control when the data changes.
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Feb 13, 2011
I have two forms with a label on each form. Both labels are bound to the same tbl/fld in a database. When I run program and use binding navigator to scroll thru the data on form 1, I want the form 2 label positioned at the same point when it is shown.
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Dec 6, 2009
I've been working over the past year or so to make a very advanced web browser in visual basic, with features like speed dial, password remembering, popup handlers, phishing filters, advert blockers, etc. The final step of the way for me is to add in a toolbar feature. I don't want the source code - that would be asking far to much, but if someone has found any code which might point me in the right direction it would be much appreciated. My code is allready around 15000 lines?
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Apr 14, 2009
i have an xml file that looks like:
<?xml version="1.0"?>
<ROWSET>
<ROW>
[Code]....
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Feb 24, 2010
[code...]
On my first form, I have a combobox that is bound to the Locations table and displays all the different locations. Once a location is selected, a 2nd form is loaded which has textboxes which are also bound to the Locations table and are populated with the corresponding data.
Here's my issue: on the 2nd form, I have combobox that is bound to the Offices table. Currently, when this form loads all the available offices, displaying with the first office in the list. I need it to populate with the correct office based on the selection made on the combobox on the first form. I guess what I'm asking is, how does one bind a combobox to a foreign key b/c it is the foreign key, office_refnbr, from the Locations table that needs to display in the Office combobox.
I've tried a variety of bindings, including:[code...]
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Jun 12, 2009
I have a list box which is containning diffrent groups from database. On the form i have multiple controls like checkboxes, text boxes and so on. Wht i have to do when some one selects a entry from list box the others controsl should be populated from that value. User can edit the data , delete the data and so on.
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Jul 7, 2010
I use the binding navigator in my application, but when the resolution of the display gets to small and I have to use the scrollbars, then I get a problem. The scrollbars automatically scrolls down below the navigator bar instead of showing it when the window loads. I figured it out using focus or select. it now loads on top,but then I got a second problem.When I press on my tab-control it "autoscrolls" down again and puts the tab-control as the first visible thing on the screen instead of the navigation bar. How can I prevent that?
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Mar 26, 2011
i am trying to make toolbars in VB that change their style according to the color scheme of your computer.if you don't know what i am talking about, look at the toolbars in IE, Firefox(with default theme), Notepad++ ect.i can use a boackround image for toolstrips, but they won't change for different OS's, i tried a toolbar control, but had the same theme problem and the buttons won't do anything?
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Apr 23, 2010
how to use the VS 2010 IDE tools in a way the Microsofties didn't specifically intend. But since this is something I immediately tried without success.
I have defined a .NET 4.0 WPF Application project with a simple class that looks like this:
Public Class Class1
Public Property One As String = "OneString"
Public Property Two As String = "TwoString"
[Code]....
The expected result was that "OneString" would appear next to "One" and "TwoString" next to "Two" in the running window.
The question is: Why didn't this work? What will work instead? If I put bindings in a DataTemplate, it works. Blend, with its sample data stuff, implied that this should work, but it doesn't.
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Sep 13, 2010
What I would like to do is bind a combobox to my own object which is as follows:
Public Class Categories
Public Sub New(ByVal myConn As SqlConnection)
Dim myConnection As SqlConnection = myConn
myConnection.Open()
[code]....
(I have put breakpoints and I know this object has data.)So on my form how do I bind my combobox to this object? The code I have is below:
Dim bs As New BindingSource
bs.DataSource = New Inventory.Categories(myconn)
cboCategory.DataSource = bs
cboCategory.DisplayMember = "Description"
cboCategory.ValueMember = "CategoryID"
but it returns the following error: Cannot bind to the new display member. Parameter name: newDisplayMember
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