dyamically generate 0 to n number of web charts within a templated control. - ASP.NET Discussion Boards

Hi,
As you suggest I tried to use viewstate.But broblem is that for...loop
( For Each gridItem In DataGrid1.Items) is taking item count equals to items present in current page and not total item s in datagrid.So I can not retrive my first page values which are stored in viewstate.
I am sending changed code.Please have look at it.

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not Page.IsPostBack Then
fillgrid()
End If
Maintain_View()
Retrieve_Viewstate()
end sub

Private Function Maintain_View()
Dim recordArray(DataGrid1.Items.Count - 1) As String
Dim n As Integer
Dim gridItem As DataGridItem
For Each gridItem In DataGrid1.Items
Dim chk As CheckBox = DirectCast(gridItem.FindControl("Status"), CheckBox)
Dim lbl As Label = DirectCast(gridItem.FindControl("ID"), Label)
If chk.Checked Then
recordArray(n) = lbl.Text
ViewState.Add(lbl.Text, lbl.Text)
n += 1
End If
Next

End Function
Private Function Retrieve_Viewstate()
Dim recordArray(DataGrid1.Items.Count - 1) As String
Dim n As Integer
Dim gridItem As DataGridItem
For Each gridItem In DataGrid1.Items
Dim chk As CheckBox = DirectCast(gridItem.FindControl("Status"), CheckBox)
Dim lbl As Label = DirectCast(gridItem.FindControl("ID"), Label)
recordArray = ViewState("recordArray")
For n = 0 To DataGrid1.Items.Count - 1
If ViewState.Item(n) = lbl.Text Then
chk.Checked = True
End If

Next
Next
End Function

Like this you can implement it on vb.net .

I jave given a rough code to do

private void Page_Load(object sender, System.EventArgs e)
{
// Put user code to initialize the page here

if(!IsPostBack)
{
Fillgrid();
//Initialize view state
ViewState["ID"]=null;
}

}

private void Fillgrid()
{
//To fill the grid
}

private void Maintain_View()
{
ArrayList ar=new ArrayList();

//Get Array List from Viewstate
if(ViewState["ID"]!=null)
ar=(ArrayList)ViewState["ID"];

//Check for items in the datagrid and accoring to the checkbox value
//add it to arraylist

foreach (DataGridItem dt in dgItems.Items)
{
//If check box valuw is checked
{
ar.Add(checkId); //Add to arrayList
}

}

//Set it to viewstate

ViewState["ID"]=ar;
}

private void Retrieve_View()
{
ArrayList ar=new ArrayList();
//Get Array List from Viewstate
if(ViewState["ID"]!=null)
ar=(ArrayList)ViewState["ID"];

//Compare this with datagrid items and populate the checkboxes
}

private void dgItems_PageIndexChanged(object source, System.Web.UI.WebControls.DataGridPageChangedEventArgs e)
{
//while in pagination
dgItems.CurrentPageIndex =e.NewPageIndex();
Maintain_View();
Retrieve_View();
Fillgrid();

}

Hi Suamal,
Sorry For trouble.
As you suggest I make changes in my code.
Viewstate maintain Selected id list,But Loop count(For Each gridItem In DataGrid1.Items) is for current page only that means if i select 2 entries out of 5 from first page then 2 entries saved in viewstate,next i move to next page and select 3 items from second page Retrieve_Viewstate1's code

For Each gridItem In DataGrid1.Items
Dim chk As CheckBox = DirectCast(gridItem.FindControl("Status"), CheckBox)
Dim lbl As Label = DirectCast(gridItem.FindControl("ID"), Label)
If Arr.Contains(lbl.Text) Then
chk.Checked = True
End If
Next

execute for selected 3 items from current page only.

I mean For Each gridItem In DataGrid1.Items...next loop is consider for current page item count instead of total number of items in datagrid

Is it correct loop or you are saying to use datagridview.

I hope you keep continue to answer.

I am sending latest code as below.

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not Page.IsPostBack Then
fillgrid()
ViewState("ID") = System.DBNull.Value
End If

End Sub

Private Function Retrieve_Viewstate1()
Dim Arr As New ArrayList()
Dim n As Integer
Dim gridItem As DataGridItem

If Not (ViewState("ID") Is System.DBNull.Value) Then
Arr = CType(ViewState("ID"), ArrayList)
End If

For Each gridItem In DataGrid1.Items
Dim chk As CheckBox = DirectCast(gridItem.FindControl("Status"), CheckBox)
Dim lbl As Label = DirectCast(gridItem.FindControl("ID"), Label)
If Arr.Contains(lbl.Text) Then
chk.Checked = True
End If
Next

End Function

Private Function Maintain_View1()
Dim Arr As New ArrayList()
Dim gridItem As DataGridItem
If Not (ViewState("ID") Is System.DBNull.Value) Then
Arr = CType(ViewState("ID"), ArrayList)
End If
For Each gridItem In DataGrid1.Items
Dim chk As CheckBox = DirectCast(gridItem.FindControl("Status"), CheckBox)
Dim lbl As Label = DirectCast(gridItem.FindControl("ID"), Label)
If chk.Checked Then
Arr.Add(lbl.Text)
End If
Next
ViewState("ID") = Arr
End Function

Sub Pageing_Routine(ByVal s As Object, ByVal e As DataGridPageChangedEventArgs)
DataGrid1.CurrentPageIndex = e.NewPageIndex
Maintain_View1()
Retrieve_Viewstate1()
Fillgrid()
End Sub

Loop count of datagrid displays only the current page item count.
But in view state we can store all.

I will explain you how?

#Fill grid method()
1.Populate the grid (say 100 rows with 1 to 100 as ids)
clear viewstate

2.in first page select 2 checkboxes

3.In paging (to 2nd page)
add 2 ids to viewstate.
now it has 1,2.

while retriving
check for 1,2 ids in grid it will not be there.

4.In second page u select 3
add 3 ids with existing viewstate
now it has 1,2,11,12,13
while retriving
check for 1,2,11,12,13 ids in grid it will not be there.

5.goto 3rd page ,without selecting any ids.
now viewstate has 1,2,11,12,13

6.Return to 2nd page
now while retriving
check for 1,2,11,12,13 ids in grid 11,12,13 ids will be there.
If you change anything, you have to alter the viewstate.

# in maintain view

Private Function Maintain_View1()
Dim Arr As New ArrayList()
Dim gridItem As DataGridItem
If Not (ViewState("ID") Is System.DBNull.Value) Then
Arr = CType(ViewState("ID"), ArrayList)
End If
For Each gridItem In DataGrid1.Items
Dim chk As CheckBox = DirectCast(gridItem.FindControl("Status"), CheckBox)
Dim lbl As Label = DirectCast(gridItem.FindControl("ID"), Label)

//If already exists then, remove it from the list
If Arr.Contains(lbl.Text) Then
Arr.Remove();
End If

If chk.Checked Then
Arr.Add(lbl.Text)
End If
Next
ViewState("ID") = Arr
End Function

#call retrive view after fill GRid method

Sub Pageing_Routine(ByVal s As Object, ByVal e As DataGridPageChangedEventArgs)
DataGrid1.CurrentPageIndex = e.NewPageIndex
Maintain_View1()
Fillgrid()
Retrieve_Viewstate1()
End Sub

Great!!!!!!!
You are Genius!!!!!!!

I don't have words to say thanks to you.I really Grateful to you.
I hope we will meet soon with some more..........

Best Regards,
Nagraj

Teach Life To Laugh........ Laugh | :laugh:

Hi i have developed a webpage which contains a required field validator when i try to save information on this page by clicking save button.

i get following javascript runtime error:
" Page_Validators is undefined "

but when i see the html code of it by right click and then clicking viewsource

it displays that there is a validator present

I don't understand why this problem occurs and unable to trace it.

Can somebody throw some light on this error.

Any help will be greatly appreciated.

Praveen

-- modified at 3:35 Thursday 15th June, 2006

Which version of the ASP.NET are you using? What does your web page look like? Do you want to validate the input controls when the Save button is clicked? You might want to post some of the ASP.NET markups in the web page.

Hi I am in process of this task. i am not worrying about chart i am working about organising my data first to bind to a chart.

i dont get any data in the last repeater. my aspx code
===========================
<asp:repeater id="myRepeater" runat="server">
<ItemTemplate>
<TR>
<TD><%#DataBinder.Eval(Container.DataItem, "ScoreCardId")%></TD>
</TR>
<asp:repeater id="NestedRepeater" runat="server">
<ItemTemplate>
<TR>
<TD><%#DataBinder.Eval(Container.DataItem,"Measure_ID")%>
 
</TD>
</TR>
<asp:Repeater id="SubNestedRepeater" Runat="server">
<ItemTemplate>
<tr>
<td><%#DataBinder.Eval(Container.DataItem,"period")%></td>
<td><%#DataBinder.Eval(Container.DataItem,"target")%></td>
<td><%#DataBinder.Eval(Container.DataItem,"actual")%></td>
</tr>
</ItemTemplate>
</asp:Repeater>
</ItemTemplate>
</asp:repeater>
</ItemTemplate>
</asp:repeater>

vb code
=====================================

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'Put user code to initialize the page here

objConn = New SqlConnection(dbPath)
cmd = New SqlCommand("select distinct(ScoreCardId) from measuredata;select * from measuredata", objConn)
Dim sdap As New SqlDataAdapter(cmd)
Dim ds As New DataSet
sdap.Fill(ds)

ds.Relations.Add(New DataRelation("NestThem", ds.Tables(0).Columns("ScorecardId"), ds.Tables(1).Columns("ScorecardId")))
myRepeater.DataSource = ds
myRepeater.DataBind()
End Sub

Private Sub myRepeater_ItemDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.RepeaterItemEventArgs) Handles myRepeater.ItemDataBound
Dim dv As DataRowView = e.Item.DataItem '
If Not (dv Is Nothing) Then
Dim nestedRepeater As Repeater = e.Item.FindControl("NestedRepeater") '

If Not (nestedRepeater Is Nothing) Then
objConn = New SqlConnection(dbPath)
cmd = New SqlCommand("select distinct (measure_id) from measuredata; select * from measuredata", objConn)
Dim subadap As New SqlDataAdapter(cmd)
Dim subDs As New DataSet
subadap.Fill(subDs)

subDs.Relations.Add(New DataRelation("NestThemSub", subDs.Tables(0).Columns("Measure_ID"), subDs.Tables(1).Columns("Measure_ID")))
nestedRepeater.DataSource = dv.CreateChildView("NestThem")
nestedRepeater.DataBind()

End If
End If
End Sub 'myRepeater_ItemDataBound

Private Sub nestedRepeater_ItemDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.RepeaterItemEventArgs) Handles nestedRepeater.ItemDataBound
Dim dv As DataRowView = e.Item.DataItem

If Not (dv Is Nothing) Then
Dim subNestedRepeater As Repeater = e.Item.FindControl("SubNestedRepeater")

If Not (subNestedRepeater Is Nothing) Then
subNestedRepeater.DataSource = dv.CreateChildView("NestThemSub")
subNestedRepeater.DataBind()

End If
End If
End Sub
------------------------------
I dont know why my subNestedReapeater is not getting any data.
please help.

EVENTUALLY I NEED TO BE ABLE TO DISPLAY

ScorecardId
dynamic webchart objectS instead of subNestedRepeater

currently my output is something like this for the above code.

----------------
1
1.1.1.1

1.1.1.1

1.1.1.1

1.1.1.1

1.1.1.1

1.1.1.1

1.1.1.2

1.1.1.2

1.1.1.2

1.1.1.2

1.1.1.2

1.1.1.2

1.1.1.2

1.1.1.2

2
1.1.2.1

1.1.2.1

1.1.2.1

1.1.2.1

1.1.2.1

1.1.2.1

----------------

i want to display

1
webchart1 with all the data associated with measure_id 1.1.1.1
webchart2 with all the data associated with measure_id 1.1.2.1

2
webchart1 with all the data associated with measure_id 1.1.2.1 (only)

(please note since 2 have only one measure id so i need to plot only 1 webchart. the idea is i need to generate webchart dynamically based on how many measure_id there is for each ScorecardID.

fdgdfhfghfghf

suresh babu.k

What is this?

Best Regards,
Apurva Kaushal

It's an asdf with incorrectly positioned fingers. Wink | ;)

---
b { font-weight: normal; }

Best Regards,
Apurva Kaushal

Sir,
Can I rename the file programically in vb.net? If yes Please help me

Thanks and Regards
Amaneet Brar

File.Move[^]

dear all
can we draw graphs using asp.net/c#.net?
please reply
najeed

try this
http://www.codeproject.com/vb/net/GraphSheetControl.asp[^]

I am using bitmap class to check the dimensions of the file I mean height and width.
Dim bm as new bitmap(filepath)
bm.height
bm.width

Now the problem is when the path contains file of extention .jpg or some orte extentions it occurs an exception .Can you please tell me another way by which the dimensions of any type of image file can be find out.

Hi,
I am using office XP and i want to read the contents of the Word or excel file into my aspx page.
I have tried by using Response.contenttyp but it shows a dialog box asking if i want to save or open the file.
I want to just read the contents of the the file no editing or manipulation of the data.
how can this be achived.

Thanks in Advance.

Deepak Surana

imports system.io

dim file as new fileinfo("path")
dim str as string = file.readtoend

Thanks Amaneet but this does not solves the problem. If possible can you please provide the code in C#.

Hi all,
I have two problems

1)I want to show more than one field value in single row in single line.
means,I want to show Id,Custname on single one line
2)I want to show two or more field lines in single datagrid row.
means,I want to show Id,Custname line and Salary,Experience line in One Datagrid Row

I hope you understand my problem,and expect help from you.

Thanks,
Teach Life To laugh........ Laugh | :laugh:

-- modified at 1:42 Thursday 15th June, 2006

Can u plz explain ur problem a little bit more?

-- modified at 1:26 Thursday 15th June, 2006

You can use template column in the grid with two labels to display 2 fields

use to display it in other line

<asp:TemplateColumn HeaderText="F1 & F2" HeaderStyle-Wrap="false">
<HeaderStyle Width="15%"></HeaderStyle>
<ItemStyle Width="15%"></ItemStyle>
<ItemTemplate>
<asp:label runat="server" Visible="True" id="lblF1" Text='<%# DataBinder.Eval(Container.DataItem, "F1") %>'>

</asp:label> <asp:label runat="server" Visible="True" id="lblF2" CssClass="default_text" Text='<%# DataBinder.Eval(Container.DataItem, "F2") %>'>
</asp:label>
</ItemTemplate>
</asp:TemplateColumn>

Great!

Thanks for your help......

Back soon.......Bye

Teach Life To Laugh........ Laugh | :laugh:

Hi..
I wrote the following code to count my website visitors:
(In the Global.asax)
protected static int m_ActiveUsers;
public static int ActiveUsers
{
get
{ return m_ActiveUsers;
}
}
protected void Application_Start(Object sender, EventArgs e)
{

Application.Lock();
m_ActiveUsers=0;
Application.UnLock();

}
protected void Session_Start(Object sender, EventArgs e)
{
Application.Lock();
++m_ActiveUsers;
Application.UnLock();
}
protected void Session_End(Object sender, EventArgs e)
{
Application.Lock();
--m_ActiveUsers;
Application.UnLock();
}

But the problem it doesnt give me the right number always.Some times this code tells me there is two visitors while there is no one except me.And some times it doesnt decrement the visitors count number when i exit.

Do any one know how to make a better way that wont be affected by application errors and will solve my problem?

"I am too late but i will never give up"