Errors With Custom Task (Could Not Get Value For Property ...)
Jul 5, 2007
I wrote a custom task following the outline on MSDN. I signed it and installed it into the Tasks folder and in the GAC.
When I go to an SSIS project and add my task, the properties window shows "Could not get value for property 'd61935d9-430b-4c93-9f3e-a29f720d8659'. Specified cast is not valid." (where the guid is different obviously) for many of the properties.
What have I done wrong?
Update: I know this isn't my code because I tried a simple task that just returns success and doesn't do anything. I get the exact same errors, so I must be installing it incorrectly.
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Apr 17, 2008
Hi,
I developed a simple custom control flow component which has several read/write properties and one readonly property (lets call it ROP) whichs Get method simple returns the value of a private variable (VAR as string). In the Execute method the VAR has a value assigened. When I put the value of ROP or VAR into MsgBox I can see the correct value. However when I execute the component I can not see the value of the ROP in the property window. I see the property but its value is empty string. For example when I put a breakpoint to postexecute or check the property before click OK in a MsgBox I would expect that the property value would be updated in SSIS as well. Is there a way how to display correct values of custom tasks properties in property window?
Thanks for any hints.
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Aug 16, 2006
I am writing a custom task that has some custom properties. I would like to parameterize these properties i.e. read from a varaible, so I can change these variables from a config file during runtime.
I read the documentation and it says if we set the ExpressionType to CPET_NOTIFY, it should work, but it does not seem to work. Not sure if I am missing anything. Can someone please help me?
This is what I did in the custom task
customProperty.ExpressionType = DTSCustomPropertyExpressionType.CPET_NOTIFY;
In the Editor of my custom task, under custom properties section, I expected a button with 3 dots, to click & pop-up so we can specify the expression or at least so it evaluates the variables if we give @[User::VaraibleName]
Any help on this will be very much appreciated.
Thanks
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May 2, 2008
Hi Folks,
I have a task I wrote which does not always update the property value (as seen in the properties pane)
Basically, change something on the form, then update the task host property with:
this.taskHostValue.Properties["Duration"].SetValue(this.taskHostValue, Convert.ToInt32(spnDuration.Value));
Stepping through this, it does exactly what it is supposed to. Having a look at the property value, it confirms it has changed.
Reopening the UI and resetting all the controls returns the expected results.
The package however does not realise it has changed. There is no * next to the package name in the top tabs.
As long as the package thinks it is unchanged, SaveXML does not get called either so the tasks do not persist.
Changing the value on the properties pane works fine though.
The frustrating thing is this is slightly random. Slight in the sense that sometimes it works but most of the time it does not.
The sample code I used was the MS download IncrementTask (Which works BTW) so I can't see it as being a VS / SSIS bug but rather something I am / am not doing. 3 tasks I have written all behave the same. I have to "nudge" them before savign the package.
Any ideas what the problem might be?
TIA
Cheers,
Crispin
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Sep 21, 2006
We have a built a custom control flow task that we use frequently. It has a simple user interface form where we can set certain properties. Problem is, after I configure it once and then copy and paste it all of the internal property settings seem to be lost on the newly pasted task. When I open up the editor for the task all of the properties are displayed visually in the editor form, but the properties pane is empty.
How can this be corrected?
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Jul 6, 2007
HI,
I need to open a File through File connection manager and want to assign these file properties to SSIS precreated varibale or Newly created varibale. I want to show file properties in Propertygrid. Properties grid will conatin File Propeties Column and SSIS varibale Combobox column. The combo box will contain New variable field. When user select New Variable field, then a new SSIS varibale window will open and we can able create New variable and that Newly created variable should add to that property comboBox.
For Instance if we create a new varibale Name "Creationdate" by clicking on New Varible in ComboBox, then that CreationDate variable should add to Property ComboBox in PropertyGrid. After adding when we select that variable Name "Creationdate" then that selected file Creation date should assign to SSIS varibale "Creationdate" field.
Any Comments or sample will help me.
Nitin
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Jul 12, 2006
Hi,
I'm building a custom task and just wondering what is the correct way of passing errors back to SSIS. Is there a rcommended approach to doing this. Currently I just wrap everything in a TRY...CATCH and use componentEvents to fire it back! Here's my code:
public override DTSExecResult Execute(Connections connections, VariableDispenser variableDispenser,IDTSComponentEvents componentEvents, IDTSLogging log, object transaction)
{
bool failed = false;
try
{
/*
* do stuff in here
*/
}
catch (Exception e)
{
componentEvents.FireError(-1, "", e.Message, "", 0);
failed = true;
}
if (failed)
{
return DTSExecResult.Failure;
}
else
{
return DTSExecResult.Success;
}
}
Any comments?
-Jamie
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Apr 2, 2007
Hi,
I'm trying to enable Expression for a custom property in my custom data flow component.
Here is the code I wrote to declare the custom property:
public override void ProvideComponentProperties()
{
ComponentMetaData.RuntimeConnectionCollection.RemoveAll();
RemoveAllInputsOutputsAndCustomProperties();
IDTSCustomProperty90 prop = ComponentMetaData.CustomPropertyCollection.New();
prop.Name = "MyProperty";
prop.Description = "My property description";
prop.Value = string.Empty;
prop.ExpressionType = DTSCustomPropertyExpressionType.CPET_NOTIFY;
...
}
In design mode, I can assign an expression to my custom property, but it get evaluated in design mode and not in runtime
Here is my expression (a file name based on a date contained in a user variable):
"DB" + (DT_WSTR, 4)YEAR( @[User::varCurrentDate] ) + RIGHT( "0" + (DT_WSTR, 2)MONTH( @[User::varCurrentDate] ), 2 ) + "\" + (DT_WSTR, 4)YEAR( @[User::varCurrentDate] ) + RIGHT( "0" + (DT_WSTR, 2)MONTH( @[User::varCurrentDate] ), 2 ) + ".VER"
@[User::varCurrentDate] is a DateTime variable and is assign to 0 at design time
So the expression is evaluated as: "DB189912189912.VER".
My package contains 2 data flow.
At runtime,
The first one is responsible to set a valid date in @[User::varCurrentDate] variable. (the date is 2007-01-15)
The second one contains my custom data flow component with my custom property that was set to an expression at design time
When my component get executed, my custom property value is still "DB189912189912.VER" and I expected "DB200701200701.VER"
Any idea ?
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Aug 17, 2005
What I want to accomplish is that at design time the designer can enter a value for some custom property on my custom task and that this value is accessed at executing time.
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Oct 18, 2006
I have a custom transform, with a custom property of value 1. My question is, can I change that value during runtime with the value from a variable?
Thanks
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May 20, 2007
Is there any way to provide a readonly custom property in the ProvideComponentProperties() method of a custom PipelineComponent implementation?
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Apr 11, 2008
Hi all,
I'm wondering if anyone's accomplished this before - I've been unable to find a whiff of info on how to do this so far.
I'm creating a custom component that I'd like to give a "Derived Column" type of ability to. By that, I mean I'd like to populate a property of my component with an expression (including references to input columns, package variables and functions) and be able to evaluate it at runtime - per row processed by the component.
I would also appreciate any information as to how to provide the interface to allow the user to build such an expression as well - is there a UI function in SSIS I can call to pop up the "expression builder"?
Thanks!
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Apr 21, 2006
I'd like to be able to hold onto lineageIDs in a list in the custom property of an output object. I found that I can really only easily use an array which is fine but now that I have coded it I cannot set any of the array values programatically. I can't even initialize the array the way I want it. I also cannot change the value in the debugger, it just pops back to zero.
Am I missing something? Here's how I'm trying to do it:
IDTSCustomProperty90 linIDsProperty = output.CustomPropertyCollection.New();
linIDsProperty.Name = "KeyColumnLineageIDs";
linIDsProperty.Value = new int[MAX_KEY_COLS];
for (int i = 0; i < ((int[])linIDsProperty.Value).Length; ++i)
((int[])linIDsProperty.Value)[i] = -1;
(please ignore the \ around the [i], the forum changes [i] into for some reason)
Thanks
Charlie.
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May 28, 2008
I have set a validation error when changing a property in the advanced editor. Unfortunately this validation error is only displayed when you change tabs or press the ok button in the editor.
I have tried calling the validate method within the setcomponentproperty method but the error only show up when ok button is pressed or tab in editor.
I don't want to throw an exception, is there any way you can show a validation error immediately once the user has clicked away / entered / clicked to another property field after entering a property value in the advanced editor that is incorrect.
Thanks
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Oct 15, 2006
Im working through the MS example of "removeDuplicates". I cant seem to figure out how to add custom property for input column.
I added the helper method:
private static void AddIsKeyCustomPropertyToInput(IDTSInput90 input, object value)
{
IDTSCustomProperty90 isKey = input.CustomPropertyCollection.New();
isKey.Name = "IsKey";
isKey.Value = value;
}
I call it from:
public override void ProvideComponentProperties()
{
//...
AddIsKeyCustomPropertyToInput(input, false);
//...
}
public override void ReinitializeMetaData()
{
IDTSInput90 input = ComponentMetaData.InputCollection[0];
if (input.CustomPropertyCollection.Count == 0)
{
AddIsKeyCustomPropertyToInput(input, false);
}
// ...
}
However when I deployed it and added the component to SSIS package - I cant see the Custom Column "IsKey" in the input column properties window.
What am I missing - please help
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Jan 18, 2007
Hi,
I am showing my report in the web application using Report Viewer control.In the report i have start date and End date parameters.While running the report if i give startdate as '45/66/20007' it is displaying a message which is not user friendly.Is there is any way we can handle this type of errors and display our own custom error messages.
Thanks in advance
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Jun 22, 2006
I have a web application with a sql server 2000 backend. I use stored procedures to enter data, and use the sql RAISEERROR function to raise custom errors with the input.
My question is, is there anyway I can assign a number to these error and then catch them in my code?
e.g. I have an asset. Someone has authorised an inspection to occur on it. Now, they cannot authorise two inpsections - they must wait for one of the inspections to occur. I catch when someone is trying to authorise two inspections in the database, and raise an error.
But I then want my code to catch this error message and display a user friendly message to the user. Is there a way of attaching a number to the message so that I can catch it in my code and display an appropriate message?
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Feb 1, 2008
I created some custom code that will check to see if a file exists on a Windows Share.
Code Snippet
Public Function FileExists(ByVal FileFullPath As String) As Boolean
Try
Dim f As New System.IO.FileInfo(FileFullPath)
Return f.Exists
Catch e As Exception
Return e.Description
End Try
End Function
An example of what I am passing is this:
Code Snippet
\servernamesharenamefilename.txt
I use this code in a TextBox on my Report:
Code Snippet
=IIF(Code.FileExists(Fields!OutPutFileName.Value) = TRUE,"True","False")
I get this error in my report:
Code SnippetSystem.Security.SecurityException: Request for the permission of type 'System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.
at System.Security.CodeAccessSecurityEngine.Check(Object demand, StackCrawlMark& stackMark, Boolean isPermSet)
at System.Security.CodeAccessPermission.Demand()
at System.IO.FileInfo..ctor(String fileName)
at ReportExprHostImpl.CustomCodeProxy.FileExists(String FileFullPath)
The action that failed was:
Demand
The type of the first permission that failed was:
System.Security.Permissions.FileIOPermission
The Zone of the assembly that failed was:
MyComputer
BUT it works on my local machine. Any Ideas?
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May 21, 2008
What is equivalent to dynamic property task of dts2000 in SSIS 2005;
Thanks
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Apr 15, 2005
I am importing data from xls file to a db table with a dts. In the time of the dts creation I am using 'Transform Data Task Properties' GUI window to map incoming xls fields (source) to the table columns (destination).
Question: Is there any way to invoke the 'Transform Data Task Property' GUI window in dts runtime and use it to change the mapping dynamically in the run time?
Thanks, Vadim.
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Mar 24, 2007
Can the WaitForMe Task property be used for building eventing based tasks (that is, "tasks with no defined execution lifecycle"), as Haselden's IS book terms it?
The SSIS run-time would appear to never interrogate this property.
I tried setting a breakpoint in a custom task on the WaitForMe
property. The breakpoint was never hit at run-time. Design-time only. It seems that the run-time ignores this property.
The documentation states that "On completion of any task, the runtime examines tasks that are still running in
the container, and if any of these tasks have WaitForMe set to
false, those tasks will be canceled." Well, the tasks with WaitForMe set to false are in fact not cancelled (e.g. System::CancelEvent is not signalled).
The intention of the WaitForMe Task property is to allow for event based tasks to not prevent a package (or other container) from finishing if the event never happens.
Tasks like the WMI Event Watcher, Message QueueTask set to receive, and third party tasks like file watchers, or service broker queue receivers would seem to fall in this category.
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Jan 9, 2007
Hi,
In a custom task I have a property of type Hashtable. This property gets changed by a custom UI. After changing the value and closing the UI, the Hashtable is properly filled during investigation in the validate() method.
Now saving the package and inspecting the XML file of the package, there is only this entry:
<DTS:ObjectData><InnerObject><PromotionCodes Type="12" Value=""/></InnerObject></DTS:ObjectData>
So it seems, that the value is empty and there is no further data to the object. Trying to reopen the saved package, the opening fails with something like (Had to translate it my own from german):
Error loading '<PackageName>' : Error loading a task. The contact information for the task is ''. This problem occurs on an error during task loading.
There should be a out of the box possibility to save collections or do you have to implement Load/Save XML your own if you have complex datatypes as properties? As the package has the element of the property included (but empty), it seems it tries to save it.
Anyone a hint. Anybody occuring the same behavior?
Thanks T.
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Oct 26, 2006
SSIS data flow transformation - Lookup task - best practice concerning Cachetype
I would like to know if there's any best practice concerning the CacheType property for the the Lookup task. Default value is "Full", but if the SSIS package is working with at lot of data, i.e. +10 mill. records from the OLE DB source to be handled through a variated numbers of data flow transformation tasks, it must have an impact memory usage if the lookup table also is a large table, i.e. +8 mill. records? When should I consider turning the property value to "none"
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Apr 4, 2008
I've created a Union All data flow task which unions string fields from a couple of queries. I found that I needed to increase the length of the string field in the queries. Increasing the length causes an error in my Union All task. I can't seem to find a way to change the property of the fields in the Union All task. Most of the other data flow tasks have an advanced editor where I can change the length or type of the fields on the input and or output. I can't seem to find this for the Union All task.
Is there any way short of deleting the Output column and recreating it? (I like the order of my original output columns)
Thanks,
Bill Webster
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Mar 18, 2008
hello guys,
I am having trouble with using disable property in the expression for data flow task. Here is the issue as explained below-
lets say i have 3 tables TableA, TableB, TableC from which i need to export data. So i create a table (TableList) where I save these table names and a unique id to these tables. e.g.
TableList will have-
TableName TableID
TableA 1
TableB 2
TableC 3
in the ssis package select these tableNames & Ids from tableList in Execute SQL Task. And assign the result set to a variable object (@TableList.
Then i use For Each Loop Container (For Each ADO Enumerator) , to loop through these tablesnames & iDs
Inside this loop container, i define three data flow tasks one for each table. So i have DataFlowTaskA (For TableA), DataFlowTaskB(For TableB), DataFlowTaskC (For TableC).
Now for a given table selected in the iteration, only the corresponding DataFlow Task should be exeuted. e.g. For the 1st iteration, if TableA is selected then only DataFlowTaskA should be executed and DataFlowTaskB& C should be skipped.
In order to achieve this, I am using a 3 variable @FlagA, @FlagB, @FlagC (type Boolean) one for each Table. and use the value of these flags for the "Disable" property of the data flow task (so @FlagA will be used for Disable property in the Expression for Data FlowTaskA, and so on..)
SotThe First Step inside the Loop, I use Script Task. (Input for the script task: read variable is @TableID and Read/Write varaibles are these 3 flags)
In this script task, I initialize these flags to true or false appropriately. So this is what i do
If (Dts.Variables("TableID").Value.ToString = "1") Then
Dts.Variables("@FlagA").Value = False
Else
Dts.Variables("@FlagA").Value = True
End If
If (Dts.Variables("TableID").Value.ToString = "2") Then
Dts.Variables("@FlagB").Value = False
Else
Dts.Variables("@FlagB").Value = True
End If
So in the 1st iteration, (if TableA comes) @FlagA=False and B&C will be True.
So the Disable property for DataFlowTask will be set false and for others it will be set to True. Thus, only DataFlowTaskA will be executed.
And this action should be repeated for each input table. this is the logic.
However only for the 1st iteration(say TableA is selected) it behaves as above. i.e. DataFlowTaskA is executed and DataFlowTaskB & C are skipped. But in the 2nd iteration(say TableB is selected) , it again executes DataFlowTaskA and doesnt exeute B & C (where it should have executed B & skipped A&C).
I do set daelay validation to true for all these but it still it doesnt working as expected. Even I checked the values for all the flags for each iteration and they seem to get the correct values. But somehow Diable propery in the expression not behaving as it should.
Am i missing anything. Do i need to set any other property to make this work.
I apprecite any help.
Thanks
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Apr 3, 2006
Hi guys,
The default Engine Thread property of a data flow task is set to 5, is this the best setting? what if I would like to run complex data flow tasks on multi-processor machines, should I increase the engine thread? If so, then what is the recommended Engine Thread number for running complex data flow tasks in a multi processor system?
Even if i am running simple data flow tasks on a multi processor machine, should I change the engine thread?
Thanks!
Kervy
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Mar 17, 2008
Hi All,
I have the following issue, i want to make dynamic the Argument property of the Execute Process Task but i couldn't able to do so, i have posted several times , hopefully i will get a solution today. I am using the following Argument to execute (winzip) program.
Argument: /e C:FTPFile1.zip C:FTPUnzipped
This Argument works but since File1.zip gets change every time, i mean it will be File2.zip, thus i have to change it manually on the Execute Process Task every time, however i want it to change by itself.
To make it clear, the /e mean winzip usage for extract file, the C:FTPFile1.zip is where the zipped file is, and the C:FTPUnzipped is where i dumped the unzipped files. as you see the file name will change every time like File1.zip, File2.zip, File3.zip, etc... Thus i want to make it daynamic, for example if i execute today File1.zip, then i have to execute tomorrow File2.zip automatically, and then File3.zip etc, that means the source file is changing every time, how do i make it then to be Dynamic.
Please help, i need your input badly.
Thank you in advance,
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Sep 19, 2007
Hi,
I am facing a very strange issue with the Send Mail Task:
I am fetching the recipient from a Recordset and storing it in a variable (MailList).
Now, I modify the Send Mail Task to include an Expression which updates the "ToLine" property with the email address in the "MailList" variable.
Moreover, I am not hard-coding the "To" property in the "Mail" tab of "Send Mail Task Editor" and leaving it blank. Now, it does not allow me to execute the package and gives me a "Package Validation Error" saying: No recipient is specified.
Any solutions?
Thanks in advance.
Regards,
B@ns
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Apr 5, 2007
This task or container has failed, but because FailPackageOnFailure property is FALSE, the package will continue. This warning is posted when the SaveCheckpoints property of the package is set to TRUE and the task or container fails.
I have just spotted the message above in one of my log files.
I've never noticed it before. Is it new in SP1? I'm guessing it must be.
If so - good job. This is a very important addition because the behaviour of checkpoints without setting FailPackageOnFailure=TRUE is not intuitive (in my opinion).
-Jamie
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Jan 22, 2008
Hello,
I am having a hard time setting the executable path for an Execute Process Task in SSIS. I have a variable that is initialized at package statup which holds the path to an executable in Windows. When I set the property "Executable" Path in an expression, I get a warning that the path for the executable is not set. One workaround was to try and initialize the variable with a bogus path with the hopes that the "correct" value will be written on run-time. NO LUCK. I still get the error and I cannot run the package until I put a static path.
Does anyone have a clue as to what is going on??
Mike
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Jul 5, 2002
I've created a custom task in VB6 and compiled the DLL. wHen I run the task in DTS designer as a step it runs ok, however when I try to exectue the whole package nothing happens??
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Nov 19, 2007
Hi there,
I'm still pretty new to SSIS, what I am really battling with is getting a custom task to work.
I have developed a custom task, digitally signed it added it to the Global Assembly Cache, written the UI for it - Pretty much as it is done here: http://technet.microsoft.com/en-us/library/ms136080.aspx
but my problem is that when I drag it from the tool box into the control flow pane, I get this message: "The task user interface specified by type name 'XXXXXXXXXXXXXXXXXXX' could not be loaded.
(Microsoft.DatatransformationServices.Design).
Does anybody have an idea of what I am doing wrong here?
Duane.
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Nov 20, 2006
Hello All,
We have developed some custom tasks which we currently deploy the standard way. That is, we install the custom task assemblies in the DTSTasks folder and we also install the assemblies in the GAC. Due to some deployment practices we are trying to implement we would like to be able to remove the assemblies from the GAC and install them in some other location. I have tried installing the assemblies in the DTSBinn folder, but this does not appear to be working. When I drop the custom control flow tasks onto the package's control flow tab I get the "Cannot create a task with the name ..." error.
Is it possible to not have the custom task assemblies in the GAC? Are there any tricks to getting it to work?
FYI, our assemblies are signed. I'm not sure if that has anything to do with our troubles.
Thanks,
Rob
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