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Internal Messaging System ASP.NET

Posted on 2009-04-13
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Last Modified: 2012-05-06
Hi there i want to set up a very very simple internal messaging system...

Pages:
DefaultMessages.aspx --> Displays two links for, 1: Inbox, 2: Compose New Message
MessagesInbox.aspx --> Displays all the Messages that user received from other users
MessagesNew.aspx --> Make new messages to send

My Access DB is:
tblUsers --> UserID, Username, Password, Firstname, Lastname
tblPMMessages --> pmID, pmSubject, pmContent, MessageFrom, MessageTo

How do i setup this to work, do i need to have a relation between UserID --> MessageFrom and UserID --> MessageTo

I don't understand the logic here...Can anyone explain how i would need to setup this to make it work, if anyone just can push me in right direction...
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Question by:Neste
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LVL 15

Expert Comment

by:oobayly
ID: 24130293
If you're looking for the SQL query to to get all the messages sent to a particular user, this should do the job:
Of course, you'll want to select only the required fields rather than everything.
SELECT *
FROM tblPMMessages
INNER JOIN tblUsers ON tblPMMessages.fldMessageFrom = tblUsers.fldUserID
WHERE tblPMMessages.fldMessageTo = ?

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Author Comment

by:Neste
ID: 24136397
I have worked whit your example and i ended up with the code provided...

It works but how do i Display the Username instead for the ID...

When a user checks his/hers Inbox, i want them to know who the messages are from...

As it is now it only displays numbers/ids....
"SELECT * FROM [tblPMMessages], [tblUsers]" & _
"WHERE [tblPMMessages.MessageFromID] = [tblUsers.UserID]" & _
"AND [tblPMMessages.MessageToID] = @id"

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Accepted Solution

by:
oobayly earned 125 total points
ID: 24136504
What database server are you using? If you're using the query posted you should be receiving all fields from all tables specified in the query.
Also, you shouldn't really need the square brackets unless you have a table or field that shares a name with a keyword. ie Calling a field "Sum", or a table "View".
I'm also vaguely surprised that [tblPMMessages.MessageToID] works, as this implies that the field name is "tblPMMessages.MessageToID", not the field "MessageToID" in the table "tblPMMessages", of course this may depend on the database server.

You could of course specify the fields yourself.
SELECT
  [tblUsers].[Firstname], [tblUsers].[LastName],
  [tblPMMessages].[pmSubject], [tblPMMessages].[pmContent]
FROM [tblPMMessages], [tblUsers]
WHERE [tblPMMessages].[MessageFromID] = [tblUsers].[UserID]
AND [tblPMMessages].[MessageToID] = @id

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Author Comment

by:Neste
ID: 24136603
I am using MS Access...

Instead of MessageFromID i want to display the username from tblUsers...

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Author Comment

by:Neste
ID: 24136618
here is the aspx code...

    <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"
        DataKeyNames="pmID">
        <Columns>
            <asp:BoundField DataField="pmID" HeaderText="pmID" InsertVisible="False"
                ReadOnly="True" SortExpression="pmID" />
            <asp:BoundField DataField="pmSubject" HeaderText="pmSubject"
                SortExpression="pmSubject" />
            <asp:BoundField DataField="pmContent" HeaderText="pmContent"
                SortExpression="pmContent" />
            <asp:BoundField DataField="pmCreateDate" HeaderText="pmCreateDate"
                SortExpression="pmCreateDate" />
            <asp:BoundField DataField="MessageToID" HeaderText="MessageToID"
                SortExpression="MessageToID" />
            <asp:BoundField DataField="MessageFromID" HeaderText="MessageFromID"
                SortExpression="MessageFromID" />
        </Columns>
    </asp:GridView>
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Expert Comment

by:oobayly
ID: 24136641
Have you tried the query I posted, it should show the sender's name. All your should have to do is add a similar field for "Username"
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Author Comment

by:Neste
ID: 24136655
yeah it works now thx m8

just added:            
<asp:BoundField DataField="Username" HeaderText="Username" SortExpression="Username" />
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Author Comment

by:Neste
ID: 24136714
Any quick ides for an Insert command for this ?
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LVL 15

Expert Comment

by:oobayly
ID: 24136753
Right, now I get you. Just change "MessageFromID" to "Username" for all the attributes in the BoundField tag
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LVL 15

Expert Comment

by:oobayly
ID: 24136814
Should be as simple as this, assuming that pmID in an auto increment field
INSERT INTO tblPMMessages(pmSubject, pmContent, MessageFrom, MessageTo)
VALUES(@pmSubject, @pmContent, @MessageFrom, @MessageTo)

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