How To Fix DT_Text And DT_NText Read Only In Script Component

Nov 13, 2006

I have a script component that I have written and works as long as the Output columns on the script are string types.  When I change the output column type to text (since the size could be essentially unlimited) it gives an error in the script component that the property is read only.

Here is the code line that fails with Property Payments is read only.

Output0Buffer.Payments = fieldValues(i)

If I change the column payments to DT_Wstr it works without issue, but I want to use text incase the value is large.

Here is the error if you try to run the actual script even though I know it has an error.

TITLE: Package Validation Error
------------------------------

Package Validation Error

------------------------------
ADDITIONAL INFORMATION:

Error at Data Flow Task [Script Component [85]]: Error 30526: Property 'Payments' is 'ReadOnly'.
Line 86   Column 13 through 69
Error 30526: Property 'Ops' is 'ReadOnly'.
Line 155   Column 13 through 65

Error at Data Flow Task [Script Component [85]]: Error 30526: Property 'Payments' is 'ReadOnly'.
Line 86   Column 13 through 69
Error 30526: Property 'Ops' is 'ReadOnly'.
Line 155   Column 13 through 65

Error at Data Flow Task [DTS.Pipeline]: "component "Script Component" (85)" failed validation and returned validation status "VS_ISBROKEN".

Error at Data Flow Task [DTS.Pipeline]: One or more component failed validation.

Error at Data Flow Task: There were errors during task validation.

 (Microsoft.DataTransformationServices.VsIntegration)

------------------------------
BUTTONS:

OK
------------------------------

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How To Convert DT_NTEXT To DT_WSTR In Script Component

Oct 24, 2006

The IC column referenced in the script below is DT_NTEXT, so when I run it the output value column gets "Microsoft.SqlServer.DTS.Pipeline.BlobColumn" instead of the individual codes (separated by "*"). Also, there is only 1 output row per input row, instead of 1 output row per code.

I found some references to the GetBobData() method, but replacing Row.IC.ToString() with Row.IC.GetBlobData(0, CInt(Row.IC.Length)).ToString() puts "System.Byte[]" in the value output column. There is still only output row per input row.

So how do I convert the IC column to a String that can be Split()?Public Overrides Sub Input0_ProcessInputRow(ByVal Row As Input0Buffer)
Dim seq As Integer = 0
For Each code As String In Row.IC.ToString().Split("*"c)
'Add a row to the output buffer:
Output0Buffer.AddRow()

'Preserve columns from the input buffer:
Output0Buffer.itemid = Row.itemid
Output0Buffer.attributeid = Row.attributeid
'Output0Buffer.IC = Row.IC

'Add output columns:
Output0Buffer.seq = seq
Output0Buffer.value = code
seq += 1
Next
End Sub

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What should be done to over come the problem please help me on this regard 

 

Thanks

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Hello, I am trying to configure a Script Component as a data source. Although this should be a simple exercise, I am running into a problem.

My control flow contains a Foreach Loop with a file iterator. The Directory Expression of the Foreach Loop Editor is supplied by an expression mapped to a package level variable called inputdirectory. The FileNameRetrieval Expression is mapped to a package scoped variable called filename.

My data flow is encapsulated by the Foreach Loop, and contains a Script Component as Source for the Data Flow Source, and a Flat File for the Data Flow Destination. The contents of the Script Designer are as follows:




Code Block
Imports System
Imports System.Data
Imports System.Math
Imports Microsoft.SqlServer.Dts.Pipeline.Wrapper
Imports Microsoft.SqlServer.Dts.Runtime.Wrapper
Imports System.IO
Public Class ScriptMain

Inherits UserComponent
Dim thisFileDate As Date
Dim thisFileName As String
Dim thisFilePath As String
Public Overrides Sub CreateNewOutputRows()

thisFileName = ReadOnlyVariables("filename").Value.ToString()
thisFilePath = ReadOnlyVariables("inputdirectory").Value.ToString()
thisFileDate = File.GetCreationTime(thisFilePath & "" & thisFileName)
FileSpecBuffer.AddRow()
FileSpecBuffer.FileName = thisFileName
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FileSpecBuffer.CreateDate = thisFileDate
End Sub
End Class






When I debug the package, I get the following error:

The collection of variables locked for read access is not available at this point.

at Microsoft.SqlServer.Dts.Pipeline.ScriptComponent.get_ReadOnlyVariables()

at ScriptComponent_67311120e6eb4162a3ea1f70847f04de.ScriptMain.CreateNewOutputRows()

at ScriptComponent_67311120e6eb4162a3ea1f70847f04de.UserComponent.PrimeOutput(Int32 Outputs, Int32[] OutputIDs, PipelineBuffer[] Buffers)

at Microsoft.SqlServer.Dts.Pipeline.ScriptComponentHost.PrimeOutput(Int32 outputs, Int32[] outputIDs, PipelineBuffer[] buffers)

My googlefu fails me at reconciling this. I have read various posts about changing the line ReadOnlyVariables("filename").Value to ReadWriteVariables("filename").Value, and handling the buffer assignment in PostExecute. The problem is that all examples shown are either for Script Component as Destination or Script Component as Transformation. I have tried playing with the Custom Properties in the Script Commponent set the ReadOnlyVariables and ReadWriteVariables, using a PreExecute method, a PostExecute method, all with different errors returning. I'm at a loss here. Could anybody provide me with a simple working example so that I can correctly populate my output buffer in the context of Script Component as Source?


I fully understand that I could just run a Script Task Using System.IO.Directory, and System.IO.File, but I really want to make this package work in the manner I've described. Any help would be appreciated.

Thanks,

John T

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[code]....

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Thank in advance




TITLE: Editing Component
------------------------------

The component is not in a valid state. The validation errors are:
Error at NMF [Data Conversion [6328]]: Conversion from "DT_TEXT" to "DT_WSTR" is not supported.


Do you want the component to fix these errors automatically?

------------------------------
BUTTONS:

&Yes
&No
Cancel
------------------------------

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Hello Experts,

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Hello,

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Please advice.
Thank you.





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Hi:

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I can reproduce this on 2 different computers.

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Here is a slimmed down code sample of what causes the error :


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Try
Dim xmlDoc As New XmlDocument
xmlDoc.Load("c:ulkasync_86281519_20070628045850225_4.xml")
MsgBox("xmlLoaded") --this doesn't display once the package starts "acting up"
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End Try
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End Sub
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Try
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Dim rd As StreamReader = New StreamReader(fileName)
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xml = xml.Replace("<![CDATA[<![CDATA[", "<![CDATA[")
xml = xml.Replace("]]>]]>", "]]>")
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#Region " Web Form Designer Generated Code "

'This call is required by the Web Form Designer.
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
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'
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'
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'
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'
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'NOTE: The following placeholder declaration is required by the Web Form Designer.
'Do not delete or move it.
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#End Region

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'Put user code to initialize the page here
End Sub

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End If
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End If
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