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I have a datagrid that I change the datasource for at runtime. It is always bound to a strongly typed collection. If I bind to a collection, then bind to another collection with a larger number of items I get an 'Error when committing changes to original data store'. I believe that somehow the...

I have a typed object which includes a second nested typed object. I want to show properties of the nested object on a data grid on a windows form. Any suggestions? So far, I have set up: DataGridTableStyle tsl = new DataGridTableStyle(); tsl.MappingName = "ObjectA"; DataGridColumnStyle col1...

I have a web page that I want users to be able to open files from. The files will all be text files that contain SQL that I would then run against a database. How do I get a new Open File Dialog window. In a windows application I would use System.Windows.Forms.OpenFileDialog. What is the...

I am sure this is a dumb question but how do you override this property? I have a C# application that I am rolling out by creating a deployment project. On the Installation Folder the default is to install for 'just me' and I need it default to 'everyone'. What property do I need to set (I've...

I have a simple C# application with just an exe. I have added a setup project creating my .msi file and than ran this to install the application. After making changes and then recompiling my setup project. If I try and run the new .msi file I get an error message saying "Another version...

I have a checkboxlist that when I am subsequently interorgating to check selected status is not keeping the status of the control. I'm sure it must be something simple that I have forgotten to select but can't see it anywhere. I have made sure that enableviewstate is set to true. Any help...

Hi, I need to find the time difference between datetime fields. DateDiff only appears to give me the days. The data I am checking will usually be only a couple of hours difference but could potentially be a more than 24 hours. Possibly to complicate matters the second date I am comparing...

I'm new to C# and have a fundamental question I'm sure you could all answer in your sleep. I have a form and on clicking a button instantiate a new class and loop through a series of files. After each file I want to update a progress bar on my form to show how many files have been processed...