The only way I know how to accomplish this, is by altering your RDLC file during runtime. Basically, you can load up your RLDC file into memory (its just an XML file), locate the XML node that contains the width of your table - then modify the setting in memory. Once you have done that, you can refresh your reportViewer control using the RDLC file that is loaded in memory.
And yes, I have already done this, and it does work.
--- EDIT --- The following code example is to alter the data of an RDLC file in memory, via its XMLpath.
Private Sub ModifyRDLCInMemory()
Dim xmlDoc As XmlDocument = New XmlDocument
Dim asm As Reflection.Assembly = Reflection.Assembly.GetExecutingAssembly()
'create in memory, a XML file from a embedded resource
Dim xmlStream As Stream = asm.GetManifestResourceStream(ReportViewer1.LocalReport.ReportEmbeddedResource)
Try
'Load the RDLC file into a XML doc
xmlDoc.Load(xmlStream)
Catch e As Exception
MessageBox.Show(e.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error, MessageBoxDefaultButton.Button1)
End Try
'Create an XmlNamespaceManager to resolve the default namespace
Dim nsmgr As XmlNamespaceManager = New XmlNamespaceManager(xmlDoc.NameTable)
nsmgr.AddNamespace("nm", "http://schemas.microsoft.com/sqlserver/reporting/2005/01/reportdefinition")
nsmgr.AddNamespace("rd", "http://schemas.microsoft.com/SQLServer/reporting/reportdesigner")
'Loop through each node in the XML file
Dim node As XmlNode
For Each node In xmlDoc.DocumentElement.SelectNodes(String.Format("//nm:{0}[@rd:LocID]", "Value"), nsmgr) 'XPath to LocID node.. You will want to change this to locate your Table Width node. You may need to read up on XMLPath
Dim nodeValue As String = node.InnerText 'Gets current value of Node
If (String.IsNullOrEmpty(nodeValue) Or Not nodeValue.StartsWith("=")) Then
Try
node.InnerText = YOURNEWVALUE
Catch ex As Exception
'handle error
End Try
End If
Next
ReportViewer1.LocalReport.ReportPath = String.Empty
ReportViewer1.LocalReport.ReportEmbeddedResource = Nothing
'Load the updated RDLC document into LocalReport object.
Dim rdlcOutputStream As StringReader = New StringReader(xmlDoc.DocumentElement.OuterXml)
Using rdlcOutputStream
ReportViewer1.LocalReport.LoadReportDefinition(rdlcOutputStream)
End Using
End Sub