I have 3 tables in database shown below. And I want to make a report just like shown link below. How can I do it with datagrid or datalist? Which one is the best chois? I have tried to do it for a week.
http://img123.imageshack.us/my.php?image=61519307xx5.jpg
COMPANY: ID_COMPANY, COMPANY_NAME
PRODUCT: ID_PRODUCT, PRODUCT_NAME
PRODUCT_SALE: ID_COMPANY, ID_PRODUCT, SALE_COUNT
What version of SQL are you running? Using PIVOT might be a quick way to get the data into the form you want, and then you can use the generic DataGrid to just display the data in it's (almost) "raw" form - that is, the way the data is presented by the SQL server. You could then think of the DataGrid more like a spreadsheet than representative of a data table as found in a database.
Here's a good starter document for how to use PIVOT to represent the data in the form you're after:
http://www.tsqltutorials.com/pivot.php
Of course, I think this might only be available in SQL 2005... so if you're running an older version this may be no help.
Following will work if product numbers are static:
< asp:gridview >
< columns >
< asp : boundfield datafield = "companyname" itemstyle-headertext="" / >
< asp : boundfield datafield = "SALE_COUNT" itemstyle-headertext= '<%# FunctionToLoadurproduct(product1) %>' / >
< asp : boundfield datafield = "SALE_COUNT" itemstyle-headertext= '<%# FunctionToLoadurproduct(product1) %>' / >
and so on...
< /columns>
< /gridview >
manage the product sales according to the product id in ur query using inline quries.
Looks like a crosstab report to me. You have 2 options to go about this
I'm so sorry to haven't warn you, I use oracle 10 g to do it. Is the pivot, can be use for oracle too?
On Oracle 10g you're going to need the MODEL extension, it's not a world different than PIVOT in SQL but obviously Oracle 10g does things its own way:
http://technology.amis.nl/blog/300/pivoting-in-sql-using-the-10g-model-clause
Hi!
I could do it, with your helps. However Now I have a small problem too.
When I write query with pivot, products' name become column header. if a product name's length is bigger than 30 character, Oracle don't accept it as a column header. So I have croped and make the product names 30 character to solve this problem. After that a problem occured too.
When I crop product name as 30 character, some products become same name and "ORA-00918: column ambiguously defined" error message occured.
In this case what can be done?
Use nested Repeaters Control. The outer repeater will repeat Companies and the inner will repeat Products.
Can you give me a template html code about nested repeater? What should design be?
Use a standard sql query (pivots are expensive in terms of performance) and create a custom pivot function in your server side code. Here are a couple of examples.
''' <summary>
''' Pivots columnX as new columns for the X axis (must be unique values) and the remaining columns as
''' the Y axis. Optionally can include columns to exclude from the Y axis.
''' </summary>
''' <param name="dt"></param>
''' <param name="columnX"></param>
''' <param name="columnsToIgnore"></param>
''' <returns>DataTable</returns>
''' <remarks></remarks>
Public Shared Function Pivot(ByVal dt As DataTable, ByVal columnX As String, ByVal ParamArray columnsToIgnore As String()) As DataTable
Dim dt2 As New DataTable()
If columnX = "" Then
columnX = dt.Columns(0).ColumnName
End If
'Add a Column at the beginning of the table
dt2.Columns.Add(columnX)
'Read all DISTINCT values from columnX Column in the provided DataTable
Dim columnXValues As New List(Of String)()
'Create the list of columns to ignore
Dim listColumnsToIgnore As New List(Of String)()
If columnsToIgnore.Length > 0 Then
listColumnsToIgnore.AddRange(columnsToIgnore)
End If
If Not listColumnsToIgnore.Contains(columnX) Then
listColumnsToIgnore.Add(columnX)
End If
' Add the X axis columns
For Each dr As DataRow In dt.Rows
Dim columnXTemp As String = dr(columnX).ToString()
If Not columnXValues.Contains(columnXTemp) Then
columnXValues.Add(columnXTemp)
dt2.Columns.Add(columnXTemp)
Else
Throw New Exception("The inversion used must have unique values for column " + columnX)
End If
Next
'Add a row for each non-columnX of the DataTable
For Each dc As DataColumn In dt.Columns
If Not columnXValues.Contains(dc.ColumnName) AndAlso Not listColumnsToIgnore.Contains(dc.ColumnName) Then
Dim dr As DataRow = dt2.NewRow()
dr(0) = dc.ColumnName
dt2.Rows.Add(dr)
End If
Next
'Complete the datatable with the values
For i As Integer = 0 To dt2.Rows.Count - 1
For j As Integer = 1 To dt2.Columns.Count - 1
dt2.Rows(i)(j) = dt.Rows(j - 1)(dt2.Rows(i)(0).ToString()).ToString()
Next
Next
Return dt2
End Function
''' <summary>
''' Can pivot any column as X, any column as Y, and any column as Z. Sort on X, sort on Y and optionally, the
''' values at the intersection of x and y (Z axis) can be summed.
''' </summary>
''' <param name="dt"></param>
''' <param name="columnX"></param>
''' <param name="columnY"></param>
''' <param name="columnZ"></param>
''' <param name="nullValue"></param>
''' <param name="sumValues"></param>
''' <param name="xSort"></param>
''' <param name="ySort"></param>
''' <returns>DataTable</returns>
''' <remarks></remarks>
Public Shared Function Pivot(ByVal dt As DataTable, ByVal columnX As String, ByVal columnY As String, ByVal columnZ As String, _
ByVal nullValue As String, ByVal sumValues As Boolean, ByVal xSort As Sort, ByVal ySort As Sort) As DataTable
Dim dt2 As New DataTable()
Dim tickList As List(Of Long) = Nothing
If columnX = "" Then
columnX = dt.Columns(0).ColumnName
End If
'Add a Column at the beginning of the table
dt2.Columns.Add(columnY)
'Read all DISTINCT values from columnX Column in the provided DataTable
Dim columnXValues As New List(Of String)()
Dim cols As Integer = 0
For Each dr As DataRow In dt.Rows
If dr(columnX).ToString.Contains("'") Then
dr(columnX) = dr(columnX).ToString.Replace("'", "")
End If
If Not columnXValues.Contains(dr(columnX).ToString) Then
'Read each row value, if it's different from others provided,
'add to the list of values and creates a new Column with its value.
columnXValues.Add(dr(columnX).ToString)
End If
Next
'Sort X if needed
If Not xSort = Sort.None Then
columnXValues = SortValues(columnXValues, xSort)
End If
'Add columnX
For Each s As String In columnXValues
dt2.Columns.Add(s)
Next
'Verify Y and Z Axis columns were provided
If columnY <> "" AndAlso columnZ <> "" Then
'Read DISTINCT Values for Y Axis Column
Dim columnYValues As New List(Of String)()
For Each dr As DataRow In dt.Rows
If dr(columnY).ToString.Contains("'") Then
dr(columnY) = dr(columnY).ToString.Replace("'", "")
End If
If Not columnYValues.Contains(dr(columnY).ToString()) Then
columnYValues.Add(dr(columnY).ToString())
End If
Next
' Now we can sort the Y axis if needed.
If Not ySort = Sort.None Then
columnYValues = SortValues(columnYValues, ySort)
End If
'Loop all Distinct ColumnY Values
For Each columnYValue As String In columnYValues
'Create a new Row
Dim drReturn As DataRow = dt2.NewRow()
drReturn(0) = columnYValue
Dim rows As DataRow() = dt.[Select](columnY + "='" + columnYValue + "'")
'Read each row to fill the DataTable
For Each dr As DataRow In rows
Dim rowColumnTitle As String = dr(columnX).ToString()
'Read each column to fill the DataTable
For Each dc As DataColumn In dt2.Columns
If dc.ColumnName = rowColumnTitle Then
'If sumValues, try to perform a Sum
'If sum is not possible due to value types, use the nullValue string
If sumValues Then
If IsNumeric(dr(columnZ).ToString) Then
drReturn(rowColumnTitle) = Val(drReturn(rowColumnTitle).ToString) + Val(dr(columnZ).ToString)
Else
drReturn(rowColumnTitle) = nullValue
End If
Else
drReturn(rowColumnTitle) = dr(columnZ).ToString
End If
End If
Next
Next
dt2.Rows.Add(drReturn)
Next
Else
Throw New Exception("The columns to perform inversion are not provided")
End If
'if nullValue param was provided, fill the datable with it
If nullValue <> "" Then
For Each dr As DataRow In dt2.Rows
For Each dc As DataColumn In dt2.Columns
If dr(dc.ColumnName).ToString() = "" Then
dr(dc.ColumnName) = nullValue
End If
Next
Next
End If
Return dt2
End Function
''' <summary>
''' Sorts a list of strings checking to see if they are numeric or date types.
''' </summary>
''' <param name="list"></param>
''' <param name="srt"></param>
''' <returns></returns>
''' <remarks></remarks>
Private Shared Function SortValues(ByVal list As List(Of String), ByVal srt As Sort) As List(Of String)
Dim tickList As List(Of Long) = Nothing
Dim dblList As List(Of Double) = Nothing
' Figure out how to sort columnX
For Each s As String In list
Dim colDate As Date = Nothing
If Date.TryParse(s, colDate) Then
tickList = New List(Of Long)
Exit For
End If
Next
Dim dateTicks As Long
If Not tickList Is Nothing Then
For Each s As String In list
dateTicks = DateTime.Parse(s).Ticks
If Not tickList.Contains(dateTicks) Then
tickList.Add(dateTicks)
End If
Next
If srt = Sort.DESC Then
tickList.Sort()
tickList.Reverse()
ElseIf srt = Sort.ASC Then
tickList.Sort()
End If
list.Clear()
For Each lng As Long In tickList
list.Add(New Date(lng).ToString("G"))
Next
Else
Dim dbl As Double = Nothing
For Each s As String In list
If IsNumeric(s) Then
dblList = New List(Of Double)
End If
Next
If Not dblList Is Nothing Then
'Doubles or Integers
For Each s As String In list
dbl = Val(s)
If Not dblList.Contains(dbl) Then
dblList.Add(dbl)
End If
Next
If srt = Sort.DESC Then
dblList.Sort()
dblList.Reverse()
ElseIf srt = Sort.ASC Then
dblList.Sort()
End If
list.Clear()
For Each d As Double In dblList
list.Add(d.ToString)
Next
Else
'Strings
If srt = Sort.DESC Then
list.Sort()
list.Reverse()
ElseIf srt = Sort.ASC Then
list.Sort()
End If
End If
End If
Return list
End Function