Templates - get name of column inside calling script

No, this is not possible. You would need to provide the TableName/ColumnName to your function in your call from the value template manually.

Actually I found a way to do it. Each template is a separate function with name Tmpl_TableName_ColumnName() so we can get name of function which is called and get data.

Dim TemplateObject As List(Of String) = System.Refelection.MethodBase.GetCurrentMethod().Name.Split("_"c).ToList
Dim TableName As String = TemplateObject(1).ToString()
Dim ColumnName As String = TemplateObject(2).ToString()

Actually I found a way to do it. Each template is a separate function with name Tmpl_TableName_ColumnName() so we can get name of function which is called and get data.

Dim TemplateObject As List(Of String) = System.Refelection.MethodBase.GetCurrentMethod().Name.Split("_"c).ToList
Dim TableName As String = TemplateObject(1).ToString()
Dim ColumnName As String = TemplateObject(2).ToString()