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Reference To Controls On A Formfor a number of reasons I would like to be able to do this one simple thing. I have a form with a number of controls on it. I have created these controls in the form design tool, and given them unique names. I would like to be able to put together a line of code that allows this: OtherForm.Label(UniquePart).Text = "Some text or other" I can't seem to build a reference to a control on a form. Every approach I try seems to object to me trying to use strings to define it! How the heck can I get a variable into an object reference? When I try to create a control variable, it won't let me concatenate and assign the string variables to it. Anyone got a clue? Thanks, NinerSevenTango 97T wrote:
Show quoteHide quote > Well this is still bugging me. I know there are other ways around this, but You need to setup a property on "otherform" to reference your controls. > for a number of reasons I would like to be able to do this one simple thing. > > I have a form with a number of controls on it. > > I have created these controls in the form design tool, and given them unique > names. > > I would like to be able to put together a line of code that allows this: > > OtherForm.Label(UniquePart).Text = "Some text or other" > > > I can't seem to build a reference to a control on a form. Every approach I > try seems to object to me trying to use strings to define it! How the heck > can I get a variable into an object reference? > > When I try to create a control variable, it won't let me concatenate and > assign the string variables to it. > > Anyone got a clue? > > Thanks, > > NinerSevenTango > > If you just want to return a labelbox then: In OtherForm: public readonly property Label(Index as String) as LabelBox Get For Each Ctr as control in Me.Controls if Ctr.name = index then return directcast(ctr, labelbox) end if next return nothing End Get end property Hope it helps Chris Thanks, Chris,
I am getting the idea that it is impossible in this language to assemble a reference by name from a string. I guess whichever way I go about this, I am going to have to recurse the form every time I want to refer to an object on a form, or else type the name out in the code. I wish someone would prove me wrong. I thought I had it figured out once, by using a function to return the reference, but I had something else not working and erased it before I figured out that saving projects to new names leaves the same form and its code in use, so I lost it permanently. Grrrrrr. Thanks for taking the trouble to reply, --NinerSevenTango-- Show quoteHide quote "Chris" <no@spam.com> wrote in message news:OhX0WZpKGHA.2336@TK2MSFTNGP12.phx.gbl... > > You need to setup a property on "otherform" to reference your controls. If > you just want to return a labelbox then: > > In OtherForm: > public readonly property Label(Index as String) as LabelBox > Get > For Each Ctr as control in Me.Controls > if Ctr.name = index then > return directcast(ctr, labelbox) > end if next > return nothing End Get > end property > > Hope it helps > Chris hi,
It seems to be parent child form problem. Consider formA (parent) and formB (child). Now u want to create some control in formA and assign values from formB. So when u create object of formB then u better create a reference with functions in formB of formA, it will help u assign values into the controls to formA. You may better create two functions one for reference setting and other for assign values in controls of formA. I will send a sample for u if u request. regards kashif ahmed kashifahmed.bse***@gmail.com Thank you for replying, sir.
What I would like to do is to accomplish the build of a name to use as the reference to a named object, such as a control on a form. I get data type conversion errors every which way I try. It doesn't matter whether the control is on the same form or not. The problem is that I can't figure out a way to use variables to pick which control to act upon. The use of control arrays, and the workarounds therefore in dot net seem to be a workaround to this problem. I can and will use the control arrays, but I thought the functionality should be in there somewhere to allow me to put together a few variables and use that as a name. That's what the question is about. Dim a as String = "Label" Dim b as String = $(1) Dim x as Control = a & b x.Text = "Some Value" I've tried this a bunch of different ways. Am I missing something simple? Thanks again for replying, --NinerSevenTango-- <kashifahmed.bse***@gmail.com> wrote in message Show quoteHide quote news:1139182238.773948.208900@g44g2000cwa.googlegroups.com... > hi, > > It seems to be parent child form problem. Consider formA (parent) and > formB (child). > > Now u want to create some control in formA and assign values from > formB. So when u create object of formB then u better create a > reference with functions in formB of formA, it will help u assign > values into the controls to formA. > > You may better create two functions one for reference setting and other > for assign values in controls of formA. > > I will send a sample for u if u request. > > regards > kashif ahmed > kashifahmed.bse***@gmail.com > To be more specific, I get type conversion errors, can't convert string to
control. Show quoteHide quote > > Dim a as String = "Label" > Dim b as String = $(1) > > Dim x as Control = a & b > x.Text = "Some Value" > > I've tried this a bunch of different ways. > > Am I missing something simple? > > Thanks again for replying, > > --NinerSevenTango-- "97T" wrote
> Thanks, Chris, 97T,> > I am getting the idea that it is impossible in this language to assemble a > reference by name from a string. > The code I posted works. Couldn't you get it to work for you? Stan -- Stan Smith ACT! Certified Consultant ADS Programming Services Birmingham, AL 205-222-1661 ssmith_at_adsprogramming.com Yes, Stan, I'm working on using that concept.
I reposted because I wanted to know if there is any way to build a reference to a named object from a variable or concatenation thereof. I came to this language because I wanted explicit data typing along with some other features. Now I can't assign a string to a variable and pass that as the name of an object. Go figure. --NinerSevenTango-- Show quoteHide quote "Stan Smith" <ssm***@adsprogramming.com> wrote in message news:%23ianxHrKGHA.1132@TK2MSFTNGP10.phx.gbl... > 97T, > > The code I posted works. Couldn't you get it to work for you? > > Stan > > -- > Stan Smith > ACT! Certified Consultant > ADS Programming Services > Birmingham, AL > 205-222-1661 > ssmith_at_adsprogramming.com > > > Hi,
You would have to understand the difference between a scripting language and a build (compiled language) (exe or dll) A scripting language uses all your names at runtime, it is not precompiled every statement is everytime compiled completely from source to machine code. A build language renames all your mnemonic (names) to a for the computer better usable code (in debug format it holds those names to show them). The advandce of a build language is simple that it is smaller, less easy to reuse for others, and process faster. Cor Thank you sir, that is what I have been suspecting.
I expect that these names become pointers to memory locations, and since the assignments are dynamic, there is no easy way to get their locations unless you build your own array that points to them. And that must be why you are prevented from building a name to a reference, because the compiler would have no way to predict which reference you are going to build. (Unless they programmed it to do it! With a minor memory and speed penalty of course.) //Start Minor Rant// It's not very Visual, and it's not very Basic, though. As a newcomer to this language, I have been tempted to hunt up a copy of VB6 for this reason, because the few applications I will write are intended to get a job done, and this job will be most quickly done by designing the screens once, and writing values into labels many times (something that is pretty basic to most tasks). The language is getting in my way. I don't believe the language couldn't have a generic replacement for the automatically generated control arrays I have read so much about in VB6 without breaking the OOP dot net religion. Thousands of coders spending thousands of hours to do the same task, when it could be fixed once in the program itself. All they would have to do is give a choice whether to use the automatically generated one, or build your own. They save a hundred man hours in design, it costs their userbase thousands and thousands of man hours. I don't care about portability to other operating systems. I don't care about OOP. I just need a tool to get a job done so I can go back to designing machines, designing circuits, programming machine controls, and running a maintenance department for a factory. I like strong datatypes, nice interface to networking and file operations, and standard Windows controls, that is what got me to try this language after learning the basics of several others. I don't even need multi threading, except for the 'blocking' behavior thing with sockets. All the other simple languages I looked at either tried to hide datatypes so I couldn't work on bytes, or couldn't do TCP, or didn't have bit shift instructions (I got around that, try doing CRC calcs without them sometime) or generally had some other huge stumbling block. I can get past the stumbling block of needing to go through a bunch of mumbo jumbo to write text into a box on the user's screen. It's just a speed bump. But it is very irritating. My problem is that I know too much and too little. I can write assembler for cpu's and I can implement database type operations in ladder logic PLC's, and can design and implement hardwired digital logic circuits. My own rule for designs is, "No Ambiguity For The User". But it gets deep for me when I get into instatiations of inherited methods of properties of classes and my.overloaded.namespace.isitanoperator.isitakeyword.isitabuiltinfunction.itisambiguous.tryeverypossibleiteration._ ItsNamedTheSameIsItTheOneInTheFormOrTheOneInMemory.WhatIsItsState.GoogleItForHours I know what the processor has to do to time slice operations. I have pretty good idea what it has to do to keep track of memory addresses and implement commands. It's just not very well explained how all this takes place with the tools you get. I grew up with programming manuals that were very explicit, so this seems like a religion of memorization of arbitrary rules that have fuzzy boundaries. //End Of Rant// Thank you for your patience and your insight and your wise advice. It was generous of you to take the time to respond and I do know the value of that, and I appreciate it. I am now off to finish my control array logic. I did get communications to the industrial black box working, CRC and all, now I just need to show the user what I got from the box. Maybe when I get it done I'll write a newcomer's guide on How To Write Text Variables Into Large Numbers Of Static Labels On Several Screens. --NinerSevenTango-- Show quoteHide quote "Cor Ligthert [MVP]" <notmyfirstn***@planet.nl> wrote in message news:uLP%23YhuKGHA.500@TK2MSFTNGP15.phx.gbl... > Hi, > > You would have to understand the difference between a scripting language > and a build (compiled language) (exe or dll) > > A scripting language uses all your names at runtime, it is not precompiled > every statement is everytime compiled completely from source to machine > code. > > A build language renames all your mnemonic (names) to a for the computer > better usable code (in debug format it holds those names to show them). > > The advandce of a build language is simple that it is smaller, less easy > to reuse for others, and process faster. > > Cor > 97T,
Everything what you write can probably overcomed, however you cannot say, use 97T as control, while it never has been used or declared. But you can set "97T" by instance in the Tag property Or you can make an array, which direct indexes the 97T Control. And more of those solutions. Net has not anymore the formcontrolarray as VB6 had completely only for a form. But every control has its own array of posible child controls. You can by instance write. (just typed in this message in this way never tested by me). \\\ dim 97TextBox as textbox For each ctr as control in myform.controls if ctr.tag = "97T" 97TextBox = DirectCast(ctr, TextBox) Exit For End if Next /// I hope this helps, Cor Show quoteHide quote "97T" <not@spamthis.com> schreef in bericht news:OljPU2%23KGHA.1288@TK2MSFTNGP09.phx.gbl... > Thank you sir, that is what I have been suspecting. > > I expect that these names become pointers to memory locations, and since > the assignments are dynamic, there is no easy way to get their locations > unless you build your own array that points to them. > > And that must be why you are prevented from building a name to a > reference, because the compiler would have no way to predict which > reference you are going to build. (Unless they programmed it to do it! > With a minor memory and speed penalty of course.) > > //Start Minor Rant// > > It's not very Visual, and it's not very Basic, though. > > As a newcomer to this language, I have been tempted to hunt up a copy of > VB6 for this reason, because the few applications I will write are > intended to get a job done, and this job will be most quickly done by > designing the screens once, and writing values into labels many times > (something that is pretty basic to most tasks). > > The language is getting in my way. > > I don't believe the language couldn't have a generic replacement for the > automatically generated control arrays I have read so much about in VB6 > without breaking the OOP dot net religion. Thousands of coders spending > thousands of hours to do the same task, when it could be fixed once in the > program itself. All they would have to do is give a choice whether to use > the automatically generated one, or build your own. They save a hundred > man hours in design, it costs their userbase thousands and thousands of > man hours. > > I don't care about portability to other operating systems. I don't care > about OOP. I just need a tool to get a job done so I can go back to > designing machines, designing circuits, programming machine controls, and > running a maintenance department for a factory. I like strong datatypes, > nice interface to networking and file operations, and standard Windows > controls, that is what got me to try this language after learning the > basics of several others. I don't even need multi threading, except for > the 'blocking' behavior thing with sockets. All the other simple > languages I looked at either tried to hide datatypes so I couldn't work on > bytes, or couldn't do TCP, or didn't have bit shift instructions (I got > around that, try doing CRC calcs without them sometime) or generally had > some other huge stumbling block. > > I can get past the stumbling block of needing to go through a bunch of > mumbo jumbo to write text into a box on the user's screen. It's just a > speed bump. But it is very irritating. > > My problem is that I know too much and too little. I can write assembler > for cpu's and I can implement database type operations in ladder logic > PLC's, and can design and implement hardwired digital logic circuits. My > own rule for designs is, "No Ambiguity For The User". But it gets deep > for me when I get into instatiations of inherited methods of properties of > classes and > my.overloaded.namespace.isitanoperator.isitakeyword.isitabuiltinfunction.itisambiguous.tryeverypossibleiteration._ > ItsNamedTheSameIsItTheOneInTheFormOrTheOneInMemory.WhatIsItsState.GoogleItForHours > > I know what the processor has to do to time slice operations. I have > pretty good idea what it has to do to keep track of memory addresses and > implement commands. It's just not very well explained how all this takes > place with the tools you get. I grew up with programming manuals that > were very explicit, so this seems like a religion of memorization of > arbitrary rules that have fuzzy boundaries. > > //End Of Rant// > > Thank you for your patience and your insight and your wise advice. It was > generous of you to take the time to respond and I do know the value of > that, and I appreciate it. I am now off to finish my control array logic. > I did get communications to the industrial black box working, CRC and all, > now I just need to show the user what I got from the box. > > Maybe when I get it done I'll write a newcomer's guide on How To Write > Text Variables Into Large Numbers Of Static Labels On Several Screens. > > --NinerSevenTango-- > > > > "Cor Ligthert [MVP]" <notmyfirstn***@planet.nl> wrote in message > news:uLP%23YhuKGHA.500@TK2MSFTNGP15.phx.gbl... >> Hi, >> >> You would have to understand the difference between a scripting language >> and a build (compiled language) (exe or dll) >> >> A scripting language uses all your names at runtime, it is not >> precompiled every statement is everytime compiled completely from source >> to machine code. >> >> A build language renames all your mnemonic (names) to a for the computer >> better usable code (in debug format it holds those names to show them). >> >> The advandce of a build language is simple that it is smaller, less easy >> to reuse for others, and process faster. >> >> Cor >> > > 97T,
I am doing a similar thing in my code. I currently only use it to change the colors of a control, but you should be able to use something like this: Public Sub ChangeFormControls(ByVal ctl As Control, ByVal sAction As String, ByVal sActionType As String) Try Dim ChangeBackColor As Color 'back color Dim ChangeForeColor As Color 'fore color Dim bBoldFlag As Boolean 'bold / unbold flag Dim ctlType As String = ctl.GetType.ToString ctlType = ctlType.Substring(ctlType.LastIndexOf(".")) ctlType = Right(ctlType, ctlType.Length - 1) Select Case ctlType.ToLower Case "combobox", "textbox" 'textbox and combobox change ctl.BackColor = ChangeBackColor ctl.ForeColor = ChangeForeColor End Select Catch ex As Exception End Try End Sub The real code you are looking for is around the ctlType String. I hope this is helpful to you. This is used in VB.NET 2005. Mark Dahl I just realized that this probably wouldn't help you in what you were
trying to do. Sorry. I misunderstood your problem. Mark Dahl Right, I was whining about having to step through each control and pass it
into a structure similar to what you gave me. But it is useful anyway, thanks, --NinerSevenTango-- Show quoteHide quote "Fr15ky" <shilohs***@gmail.com> wrote in message news:1139332007.174647.7560@g14g2000cwa.googlegroups.com... >I just realized that this probably wouldn't help you in what you were > trying to do. Sorry. I misunderstood your problem. > > Mark Dahl > Thank you sir, that does help.
--97T-- Show quoteHide quote "Cor Ligthert [MVP]" <notmyfirstn***@planet.nl> wrote in message news:uGC3OJ$KGHA.140@TK2MSFTNGP12.phx.gbl... > 97T, > > Everything what you write can probably overcomed, however you cannot say, > use 97T as control, while it never has been used or declared. > > But you can set "97T" by instance in the Tag property > Or you can make an array, which direct indexes the 97T Control. > And more of those solutions. > > Net has not anymore the formcontrolarray as VB6 had completely only for a > form. > > But every control has its own array of posible child controls. > > You can by instance write. (just typed in this message in this way never > tested by me). > > \\\ > dim 97TextBox as textbox > For each ctr as control in myform.controls > if ctr.tag = "97T" > 97TextBox = DirectCast(ctr, TextBox) > Exit For > End if > Next > /// > > I hope this helps, > > Cor > > "97T" <not@spamthis.com> schreef in bericht > news:OljPU2%23KGHA.1288@TK2MSFTNGP09.phx.gbl... >> Thank you sir, that is what I have been suspecting. >> >> I expect that these names become pointers to memory locations, and since >> the assignments are dynamic, there is no easy way to get their locations >> unless you build your own array that points to them. >> >> And that must be why you are prevented from building a name to a >> reference, because the compiler would have no way to predict which >> reference you are going to build. (Unless they programmed it to do it! >> With a minor memory and speed penalty of course.) >> >> //Start Minor Rant// >> >> It's not very Visual, and it's not very Basic, though. >> >> As a newcomer to this language, I have been tempted to hunt up a copy of >> VB6 for this reason, because the few applications I will write are >> intended to get a job done, and this job will be most quickly done by >> designing the screens once, and writing values into labels many times >> (something that is pretty basic to most tasks). >> >> The language is getting in my way. >> >> I don't believe the language couldn't have a generic replacement for the >> automatically generated control arrays I have read so much about in VB6 >> without breaking the OOP dot net religion. Thousands of coders spending >> thousands of hours to do the same task, when it could be fixed once in >> the program itself. All they would have to do is give a choice whether >> to use the automatically generated one, or build your own. They save a >> hundred man hours in design, it costs their userbase thousands and >> thousands of man hours. >> >> I don't care about portability to other operating systems. I don't care >> about OOP. I just need a tool to get a job done so I can go back to >> designing machines, designing circuits, programming machine controls, and >> running a maintenance department for a factory. I like strong datatypes, >> nice interface to networking and file operations, and standard Windows >> controls, that is what got me to try this language after learning the >> basics of several others. I don't even need multi threading, except for >> the 'blocking' behavior thing with sockets. All the other simple >> languages I looked at either tried to hide datatypes so I couldn't work >> on bytes, or couldn't do TCP, or didn't have bit shift instructions (I >> got around that, try doing CRC calcs without them sometime) or generally >> had some other huge stumbling block. >> >> I can get past the stumbling block of needing to go through a bunch of >> mumbo jumbo to write text into a box on the user's screen. It's just a >> speed bump. But it is very irritating. >> >> My problem is that I know too much and too little. I can write assembler >> for cpu's and I can implement database type operations in ladder logic >> PLC's, and can design and implement hardwired digital logic circuits. My >> own rule for designs is, "No Ambiguity For The User". But it gets deep >> for me when I get into instatiations of inherited methods of properties >> of classes and >> my.overloaded.namespace.isitanoperator.isitakeyword.isitabuiltinfunction.itisambiguous.tryeverypossibleiteration._ >> ItsNamedTheSameIsItTheOneInTheFormOrTheOneInMemory.WhatIsItsState.GoogleItForHours >> >> I know what the processor has to do to time slice operations. I have >> pretty good idea what it has to do to keep track of memory addresses and >> implement commands. It's just not very well explained how all this takes >> place with the tools you get. I grew up with programming manuals that >> were very explicit, so this seems like a religion of memorization of >> arbitrary rules that have fuzzy boundaries. >> >> //End Of Rant// >> >> Thank you for your patience and your insight and your wise advice. It >> was generous of you to take the time to respond and I do know the value >> of that, and I appreciate it. I am now off to finish my control array >> logic. I did get communications to the industrial black box working, CRC >> and all, now I just need to show the user what I got from the box. >> >> Maybe when I get it done I'll write a newcomer's guide on How To Write >> Text Variables Into Large Numbers Of Static Labels On Several Screens. >> >> --NinerSevenTango-- >> >> >> >> "Cor Ligthert [MVP]" <notmyfirstn***@planet.nl> wrote in message >> news:uLP%23YhuKGHA.500@TK2MSFTNGP15.phx.gbl... >>> Hi, >>> >>> You would have to understand the difference between a scripting language >>> and a build (compiled language) (exe or dll) >>> >>> A scripting language uses all your names at runtime, it is not >>> precompiled every statement is everytime compiled completely from source >>> to machine code. >>> >>> A build language renames all your mnemonic (names) to a for the computer >>> better usable code (in debug format it holds those names to show them). >>> >>> The advandce of a build language is simple that it is smaller, less easy >>> to reuse for others, and process faster. >>> >>> Cor >>> >> >> > > 
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