I have a DataViewGrid that is populated with emp records sorted by a 'header' record listing the managers name. Currently, the user is a ble to select any row, even the manager row. I want to modify the program to prevent users from being able to select the manager record or 'header' record
View 9 Replies
When I open my form that contains a DataViewGrid the first row is always automatically highlighted in blue showing that it is selected. If I use
[Code]...
Is this operation possible? I cannot find anything on it. I have something I'm working on and I have tried several techniques all fail.
View 15 RepliesI have some very long datasets how can i setup so they wrap in the Datview grid rows??
View 2 RepliesI can get the collection of selected rows but I cannot find a way to determine which is the first selected row. E.g. the table has 20 rows, the user selects rows 3,4,5,6 using the mouse on the rowheaders.How can I determine that the selection starts at row 3?
View 1 RepliesI am using VS2008 using VB. I have a datagridview sourced to a dataset. There are 5 fields mapped to the datagridview, three are read only. I am using the 'RowLeave' event to do some processing.
I am using the 'CellEnter' event to 'SendKeys" a tab in the read only cells. The question is simple: how do I allow the user to enter data into one of the 'editable' cells and change the 'Enter' key into a 'Tab' key, so that the data they entered is in the cell and I tab over to the next 'editable' cell, even if it is in the next row?
I'm trying to figure out how to get a query for multiple columns in my dataviewgrid.. So far i havn't even been able to make a single column query work, when i search something in First_Name for example, it returns nothing. ive used query builer, ive written the code myself, nothing seems to work.
View 3 RepliesI added a DVG to the form. Then I clicked on the small box and selected a data source through the design screen. I chose the connection and then the sproc to get the data. This all works fine. That was added in the Load sub automatically. I will make changes to the cells by code rather than allowing the user to change the cells themselves. Then I want to click a button and save the changes to the table. Everything I have tried does not work.
View 7 Replieswhen opening a form I parse all items, in this case the Masked Tex boxes.
I am in Germany, I want . to be a thousand separator and , to be a decimal separator.
txt.Mask = "999,999.00" does not work, I do not understand why. Can anybody give me a hint?
txt.Mask = "999.999,00" does also not work.
Public Sub config_maskedTextbox(ByVal txt As MaskedTextBox)
[Code].....
I am trying to search a Access Db via a TextBox1 a Button1 and a dataviewgrid.My sql statement loks like this:
Select LastName FROM Clients WHERE (LastName LIKE 'TextBox1.text')
This doesn't work I have tried '" & "' around the textbox words I've tried '& TexBox1 &'. This I tried to learn from Data over forms video-- LIKE @LastName +'%' that really didn't work. If I use = "Bla bla" it will work but the LIKE word does not. Even a point in the right direction. I've spent many many many hours on this. And what makes me mad is I've done it somhow before even with a combobox as a variable in the SELECT "var" but anywayI'm wondering now if the LIKE statement isn't used in Access? and if the % wildcard is used in Access?
I wanted my search result to display in the DataViewGrid but it shows nothing when i click the search button or anything i did wrong?
[Code]...
I am trying to use a DataViewGrid to show certain transactions.I also have a TextBox for the user to enter the transaction ID to fill the DataViewGrid.In the Query Builder it works if I give the NABTransID in the Query but I want it to read the TextBox1.text to find the transactions.
[code]...
Is there a way to translate this code in VB? Most of it is easy, but I can't figure out a way to override the event handler.
public class MTObservableCollection<T> : ObservableCollection<T>
{
public MTObservableCollection()
{
[code]....
Protected Overrides Sub Dispose(ByVal disposing As Boolean)
Try
If disposing = true And components IsNot Nothing Then
components.Dispose()
End If
Finally
MyBase.Dispose(disposing)
End Try
End Sub
Error: Protected Overrides Sub Dispose(disposing As Boolean)' has multiple definitions with identical signatures.How can I call this without raising an error ?
Some of my DataGridViewCells return the wrong value in their GetClipboardContent method. They are cells in a DataGridViewComboBoxColumn cells, so they use the displayed property, not the value property of the cell. I want it to return the value itself.An initial attempt was simply using
Protected Overrides Function GetClipboardContent(ByVal rowIndex As Integer, ByVal firstCell As Boolean, ByVal lastCell As Boolean, ByVal inFirstRow As Boolean, ByVal inLastRow As Boolean, ByVal format As String) As Object Return Value End Function in my DataGridViewComboBoxCell descendant but then I noted that this method is called more than one time per cell value, once for every data format DataGridView supports by standard, which are format="HTML", "Text", "UnicodeText" and "Csv". For csv, the base implementation appends a comma if it's not the last cell, for html it adds the correct tags depending on if it's the first/last row/cell in the table/table row, etc. I consider this format-specific, not cell-value specific.
So how could I replace the value that ends up in the clipboard without re-implementing all those format-specific aspects? That would result in quite some code for functionality that already exists in the base class, wouldn't it?
I have a theoretical class Name_Order, that has a string Name and a int Order. I need to indicate that two Name_Order's are different, if the pair NameOrder is different, that is, or name or order are different. Now, overriding Equals no problemo, but I have some "issues" with GetHashCode:
[Code]...
I have a main class that has a Sub procedure with no implementation. Any derived class should override and implement this procedure, so I used MustOverride in the base class.
Now, any time this procedure is called, I need to set a specific Boolean variable to True at the beginning of the procedure and set it to False at the end.
Is there a way to avoid writing these two lines of code in procedure implementation of every single derived class? Can I set this value to True in the base class, then run procedure in the derived class and then set the value back in the base class?
I am setting my viewmodel as datacontext in my xaml but I override it to my view to make few functions work however to achieve the visibility on some grids and I have a property in my VM can I override my datacontext back to my VM? If so how? I have a stackpanel that has datacontext overriden as my grid and within that stackpanel I need to change the datacontext for a button.
View 1 RepliesI inherited DataGridViewTextBoxCell because I need to add some custom property to it.
At run-time after creating the DataGridView instance and bind the data I do the following:
For k As Integer = 0 To grid.Columns.Count - 1
grid.Columns(k).AutoSizeMode = DataGridViewAutoSizeColumnMode.ColumnHeader
If k > 0 Then grid.Columns(k).CellTemplate = New CustomCell()
Next
[Code]....
the cell type is never of type CustomCell but it remains DataGridViewTextBoxCell.
Is it the best override for Equals (in VB.NET) for an object having an unique ID? [code]I took that example from the MSDN, but not entirely sure if from all points of view (including performance) is the better solution.[code]
View 2 RepliesI know how to handle overriding form closing with FormClosing event and MessageBox prompt by setting e.cancel to true but how can I override deactivation of the mdi child form?
View 3 RepliesI have an access database for steel members. Each table has a different type of member, and then in those tables, each size of that member type.
I am about to create a tool that draws these sections when they are selected, but as there are 12 different member types, I don't really want to have 12 different Subs for "Draw" that essentially do the same thing.
I considered polymorphism.. (I think I have it correct)
[code...]
I have a DGV with the Alternating row color set to grey.In the CellFormatting event on the DGV I want to go through the rows as if a cell contains a certain value I want to set the BackColor to red.However when I do this, it just gets overridden with the Alternating grey color. The cell in question in a normal colored row appears in red as expected, just not the alternating row.
rticularly when creating jQuery buttons with no text and just icons) as a result of this.Secondly I am attempting to create my own custom button output by overriding the Render() event and am having a bit of difficulty trying to understand how to go about changing the output that is provided by this event.If I look at the HtmlTextWriter that is provided as the parameter to the Render() event I can see it contains a protected property TagKey = Input {47}, is it possible to simply modify this property somehow and change it to a Button or do I need to create a new instance of the HtmlTextWriter and populate it all from the start? If so, could anyone provide some guidance as to how this would typically be done and if there are any special considerations I need to make to ensure that my derived button class is functionally equivalent to the original (excluding the html)?
<Assembly: TagPrefix("MyCompany", "MyCustomButton")>
Public Class MyButton
Inherits Button
[code].....
I would like to use the windows messagebox with for exampleyes' and 'no' buttons on it, but I want to be free to choose the lanuage on the buttons.I mean 'Ja' and 'Nein' or 'Oui' and 'Non' instead of the systems default language.
View 2 RepliesI've overriden the WndProc of the ComboBox and I am drawing my own combo box, a code snippet is below:
Protected Overrides Sub WndProc(ByRef m As Message)
MyBase.WndProc(m)
Select Case m.Msg
Case &HF
[Code]....
Though the old control is still being painted as my drawn combo box is just overlapping the old drawing. Is there a way to stop it drawing the default combo box?
I was asked to build a winform exe that receives arguments from a web service and decide in which mode the application should start.what is the best way to design and build the application?The application needs to receive 3 arguments.
User name. - stringApplication mode - Boolean (user read write privileges)List on string.
Where do I receive this arguments in the new method ?
This is a general question about Object Orientation and specifically overloading functions in .NET (or any other framework or language). I am looking at an application that has a lot of duplicate code. For example, have a look at the following functions: [code] I would of thought that best pratice would be to put: //code that is specifically relevant to Test1 variable in a separate function as it is common in both functions.
View 2 Replieswhere Windows Message constants can be found in the framework?Example: msg=0x2 (WM_DESTROY) hwnd=0x24038c wparam=0x0 lparam=0x0 result=0x0
I captured that with ...
Protected Overrides Sub WndProc(ByRef m As System.Windows.Forms.Message)
MyBase.WndProc(m)
[code].....
I have a custom version of a label control (built using a user control). While working in the designer, I want to intercept the setting of the Name property (in the properties panel) and use it to generate the Text property. That is, if I enter "lblFirstName" into the Name property of the properties panel I want to immediately see that the Text property is set to "First Name". Parsing the Name property is not the issue; I can do that.
I have tried to overload/shadow the Name property (since "Overrides" is not allowed) to essentially add this "aspect" to our custom label control but it doesn't seem to hit the Shadowed method at design time. It does hit the Shadowed method at run time if manipulated via code. The point is to avoid double the work as the label text and the label name are essentially the same. The only difference is one is formatted to be human friendly and the other machine friendly.
<System.ComponentModel.Browsable(True),
System.ComponentModel.ParenthesizePropertyName(), System.ComponentModel.DesignerSerializationVisibility(System.ComponentModel.DesignerSerializationVisibility.Visible)>
Public Shadows Property Name As String
[Code] .....
This may be a matter of picking the right attributes. Conversely, if it's an easier alternative, we could allow setting the Text property to set the Name property. I doubt this would be easier since it should also reflect the new name in the Designer.vb code, not just in the label's Name property itself.
