BTW, OLE isn't related to .NET, either. It's its own specification. .NET can interop with OLE and expose automation interfaces, but this isn't recommended. If you know anything about native COM with C++ or ATL, I suggest you use that. Exposing COM interfaces from .NET still requires the .NET Framework to be installed on the machine viewing the RTF (if you want them to see/use your OLE controls).
Hey the Remoting which is available in Normal Windows Application is not present in a Windows CE environment so if any one knows what alternatives are available and how they can be used to achieve remoting in a Windows CE environment please notify. Reply Soon.
XML Web Services might be a possibility, but there's a lot of serialization overhead for a Pocket PC/Windows CE and you're limited to HTTP's client-response/server-request mechanism, so you can't use events.
please see the code below..
I have two tables Centrals and Devices both having Central_Id as a common field..I am able to display the Centals table value in the first datagrid (dataGirdCentral).However on click of each cell on the central_id i want the corresponding entries of Devices table to be shown in the 2nd datagrid dataGridDevices..how do i do that...
private void loadCentralDevices()
ds = new DataSet();
//Getting schema of Centrals table
DataTable centralDt = new DataTable("Centrals");
String query = "Select * from Centrals";
OleDbDataAdapter da = new OleDbDataAdapter(query,ConfigurationSettings.AppSettings["MsAccess_ConnectString"]);
//Getting schema of Devices table
DataTable deviceDt = new DataTable("Devices");
String query1 = "Select * from Devices";
da = new OleDbDataAdapter(query1,ConfigurationSettings.AppSettings["MsAccess_ConnectString"]);
DataRelation dr = new DataRelation("Central_Devices_Relation",
//create a dataview of the data
DataView centralVw = new DataView(ds.Tables["centralDt"]);
//giving access to Centrals table
centralVw.AllowEdit = true;
centralVw.AllowNew = true;
//set the grid source to the author view
dataGridCentral.DataSource = centralVw;
//hook up the event handler
dataGridCentral.CurrentCellChanged+= new EventHandler(this.dataGridCentral_CellChanging);
private void dataGridCentral_CellChanging(object sender, EventArgs eArgs)
????? what do i write here to get the corresponding values?
Make the nested grid in the ID column. You must design the colum as template <templatecolumn>. Then in the grid_ItemDataBound you assign the data to the second data grid. This is the way how I would go.
You do that by setting up a DataRelation between the PK and FK in your two DataTables. See the .NET Framework SDK for more information about the DataRelation class.
Then, in the first DataGrid, set the DataMember to be the name of the first table. The DataSource would be the DataSet. For the second DataGrid, set the DataMember to FirstTableName.RelationshipName (of course substituting the first table name and relationship name you specify for the DataRelation). The DataGrids will handle the master/detail view automatically for you then.
For more information about this, see the DataGrid.DataMember property documentation in the .NET Framework SDK.
Ok here is the problem all the keys on my keyboard works with my apps on the WinForm "this.KeyDown += new KeyEventHandler(...)",but i want to use the up, down, left, right keys and they dont work (the keydown event). Even the same keys on the number pad dont work when i turn off the "Num Lock". How can i get these keys working ?
To handle the special keys the ProcessCmdKey override alone enough. Still I have added an event handler also for the Up Key Down event. This will not work as such if you run the code. To run the Event Handler code also you change the return true to return false in the ProcessCmdKey code.
What you know from this is the Arrow keys will be handled or not depends on whether it is already handled by the form or not. ie it depends on the return value of the base.ProcessCmdKey value, if you dont override it. The return value depends on the Control which has the focus, etc.
You need to understand the structure of a PE/COFF executable, and only then can you get the exported functions, structs, and classes. This is done by enumerating virtual directories in the PE/COFF executable headers and using the Relative Virtual Addresses (RVAs) to get the functions from the Export Address Table (EAT).
See the following two articles, both my Matt Pietrek for MSDN Magazine:
In order to implement the code correctly, you may need an unsafe context (it's possible without, but tedious) and you also need a good grasp on unmanaged interoperability. For more information on that, read Interoperating with Unmanaged Code[^] in the .NET Framework SDK.
If there is already sample code, I'm not aware of it (hey, I'm not google ). You could try searching for a sample using keywords from the articles above, or even searching for "C#", "RVA", etc.
BTW, if you're talking about reading the metadata of an assembly DLL (as opposed to a native DLL), then you should use .NET Reflection. See the documentation for the classes in the System.Reflection namespace in the .NET Framework SDK. For an overview and samples, read Discovering Type Information at Run Time[^] in the .NET Framework SDK.
First of all, you don't need to reload the Image if it's already in your PictureBox. Just use ev.Graphics.DrawImage(pictureBox1.Image, ...).
Second, are you getting any errors? Is your MessageBox in your exception handler showing up? Please be specific since your code should be right (except that if you're scaling the image to the page, I'm not sure why you're setting ev.HasMorePages to true).
Um, call PrintDocument.Print like you already did. If you want to know how to select a different printer, then you need to read the documentation in the .NET Framework SDK, like for the PrintDocument.PrinterSettings property, which has a printer called PrinterName. You can also use the PrinterSettings.InstalledPrinters static property to get a collection of printers that are installed. All of these properties and methods I've mentioned have plenty of sample source code that's not worth duplicating here.
When i built My Solutions, mostly Assembly version automatically increased, but some case, Assembly Version lessoned.
I did not modify AssemblyInfo.cs file.
in Assemblyinfo.cs file,
version is [assembly: AssemblyVersion("1.0.*")]
Why version lessons?
Is there any way recovering version?
The assembly version is generated according to the documentation for the AssemblyVersionAttribute in the .NET Framework SDK. From the constructor documentation:
The format of the version string is: major. minor. build. revision.
When specifying a version, you have to at least specify major. If you specify major and minor, you can specify an asterisk (*) for build. This will cause build to be equal to the number of days since January 1, 2000 local time, and for revision to be equal to the number of seconds since midnight local time, divided by 2.
If you specify major, minor, and build, you can specify an asterisk for revision. This will cause revision to be equal to the number of seconds since midnight local time, divided by 2.
So, as you should see, the version is generated using the current time. If your system clock is off or different computers are using different times zones (more common than you think, especially if someone has "Change automatically for daylight saving time" checked and another doesn't), then the version number will decrease.
Let me make a new case for you, though: disable automatic versioning! If you truly understand assembly strong names (which include the version) and manage larger solutions, you'd know why. Version numbers can quickly get out of control when using automatic versions. This is especially troublesome when you have a common build directory in a large group of developers. If assembly versions are changing all the time, you get FileNotFoundExceptions since the assembly version that the calling assembly was built against doesn't exist. You can - through .config files or publisher policy assemblies - redirect these versions easily enough (at least if there's no breaking changes) but it becomes a nightmare to manage those as well. Trust me - I'm a software architect and build master for a 60+ project solution with lots of dependencies.
The scenario is, I am in the phase of developing a print module in C# that will extract data (text, images, ladder snippets) from the project file stored in the computer's memory.
Earlier, I was trying to create an RTF file and create a project report like document, but that idea was ruled out as the amount of data is very huge.
Thus I am not supposed to create a seperate file for printing that will either be previewed or printed with the customized dialogs, as it will be an overhead to the system also it may affect the speed of the system.
The prime objective is to do printing/previewing as fast as possible.
Now I think, have only one option, that is, to create the document using Graphic Object( in GDI+ ) at run-time, using PrintPageDocument.
Its not really eassy task for me, first of all creating a formatted file like a project report that has title , creaters name and date on first page, then rest of the pages having different sub-headings, data in simple tabular format , bitmap images and ladder snippets, is a big question then inserting ladder diagrams in to it is also unthinkable, as I don't know how to read ladder diagrams using C#.
I will appreciate your every single suggestion. Please guide.
Last Visit: 31-Dec-99 19:00 Last Update: 1-Dec-23 20:32