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.NET Forum / Languages / C# / February 2008XXXXXX not available in this context.
I'm trying to create a custom control which would be a treeview which populates itself with table and field details from a database. I need to be able to call up a form to enter the server/db information. I created a form within the custom control, and I sort of thought it might not work, and it isn't. It's telling me "frmConnect" is not available in this context. Any ideas what is causing this? > [...] > It's telling me "frmConnect" is not available in this context. > > Any ideas what is causing this? Since you didn't post any code at all, it's pretty much impossible to say for sure. But presumably you are using the identifier "frmConnect" in a context in which it's not available. Whatever that identifier is, you need to make sure you're using it in a way that makes sense. If you'd like to post some code, then some advice as to what "makes sense" can be offered. Otherwise, your question is far too vague to be answered. Pete >> [...] >> It's telling me "frmConnect" is not available in this context. [quoted text clipped - 13 lines] > > Pete Sorry about that. I thought maybe it was a generalized question. The code's on another machine. private void connectToDBToolStripMenuItem_CLick(blah blah blah) { frmConnect.Show(); } frmConnect is a form that is within the custom control environment. Is more code than that needed? If so, I'll have to wait until later. I have showing a treeview, a context menu on right click of the tree view, and I'm calling this form from the menu to input the connection string parameters. > [...] > private void connectToDBToolStripMenuItem_CLick(blah blah blah) [quoted text clipped - 3 lines] > > frmConnect is a form that is within the custom control environment. What do you mean by "custom control environment"? What environment? And what do you mean by "is a form"? Is that a variable to which has been assigned an instance of a class that inherits Form? Or is it the name of a class that inherits Form? Is this a compiler error? Or run-time? What is the _exact_ error text you're getting and in what context? It kind of looks like you're trying to do in C# something that would work in VB (but which you shouldn't do anyway, IMHO). But it's hard to say without more specific information about what's actually going on (see the previous paragraph for the kinds of specific information you've left out). Pete >> [...] >> private void connectToDBToolStripMenuItem_CLick(blah blah blah) [quoted text clipped - 19 lines] > > Pete You're probably right, as I posted in the other email. I don't know what the proper vernacular is. I'm in a custom control project. I created a form within that project, thus the "custom control environment". I'll have to transfer the code from the other machine to here when I get a chance. I believe the info you've both given me in these last two posts might point to the problem. This is the first time I've tried to create a custom control, in any language, so I'm sort of slogging through. Thanks for your help and patience. > >> [...] > >> private void connectToDBToolStripMenuItem_CLick(blah blah blah) [quoted text clipped - 37 lines] > > - Zitierten Text anzeigen - I believe in VB there was a "default instance" of every form, so you could call <FormType>.Show() and it would display that default instance. In C# this doesn't work, you'll have to create an instance of the form before showing it, like so (assuming frmConnect is the name of the class): frmConnect FormConnect = new frmConnect(); FormConnect.Show(); hth, Kevin Wienhold Is a frmConnect instance declared (or a public instance referred to) in the class that contains your connectToDBToolStripMenuItem_CLick method? For example: FormConnect frmConnect = new FormConnect(); Is IntelliSense (if your using an environment that utilizes it) working with frmConnect (ie. does it auto complete such things as frmConnect.Show() while typing)? If IntelliSense "knows who it is" then the complier should as well.  SignatureRoger Frost "Logic Is Syntax Independent" >>> [...] >>> It's telling me "frmConnect" is not available in this context. [quoted text clipped - 29 lines] > and I'm calling this form from the menu to input the connection string > parameters. > Is a frmConnect instance declared (or a public instance referred to) in > the class that contains your connectToDBToolStripMenuItem_CLick method? [quoted text clipped - 8 lines] > > If IntelliSense "knows who it is" then the complier should as well. Know, Intellisense isn't getting it. I'll try what you say above. I'm just getting used to the .Net stuff and object instantiation minutia. I'm too used to VB6 ways. >> Is a frmConnect instance declared (or a public instance referred to) in >> the class that contains your connectToDBToolStripMenuItem_CLick method? [quoted text clipped - 13 lines] > I'm just getting used to the .Net stuff and object instantiation minutia. > I'm too used to VB6 ways. I'm a newbie, and I get that problem all the time. I bet you have created your method inside another class by mistake. Try moving it somewhere else. >>> Is a frmConnect instance declared (or a public instance referred to) >>> in the class that contains your connectToDBToolStripMenuItem_CLick [quoted text clipped - 19 lines] > I bet you have created your method inside another class by mistake. Try > moving it somewhere else. it is. It's in another namespace too. I just told it to add a form to the project, and that's what it did. > it is. It's in another namespace too. I just told it to add a form to > the project, and that's what it did. I made it work by preceding the object name with the other namespace name, and by instantiating it with "new". Thanks for everyone's help in jogging my brain in the right direction. Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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