Database

28-Feb-07 21:00

idol...

i have 3 columns in my table the room,timeStart,timeEnd.
For example i have inserted this data
room: room1
timeStart: 2007-03-02 8:00 AM
timeEnd: 2007-03-02 3:00 PM

Here's the data that will not be accepted if try to insert
room: room1
timeStart: 2007-03-02 9:00 AM
timeEnd: 2007-03-02 4:00 PM
because the timestart is between the timeStart and the timeEnd. Room1 will only be occupied after 3:00 PM.

Can you help me with this?.
Thank you very Much

Bernie

kubben1-Mar-07 11:16

1-Mar-07 11:16

I don't know if there is a very good way of doing this. No matter which way you do it, it will be a lot of work. Most likely you will need to have some table that keeps track of when each class can be in each room and then check that table before inserting the record. Good luck.

Ben

bernie_0111-Mar-07 18:45

1-Mar-07 18:45

Can you tell me how to use the check Constraint for that?

Bernie

kubben2-Mar-07 0:44

2-Mar-07 0:44

I have never used a check constraint in the way you are wanting to use it. I am not sure it can be done. If all records getting inserted had a certain rule then a check constraint would be the correct one to use. I am under the impression that each record might have a different rule. In that case I would not use the check constraint.

Ben

bernie_0112-Mar-07 15:48

2-Mar-07 15:48

ok can you teach me how to solved that? I dont know how to start my code for that.

Bernie

kubben2-Mar-07 15:58

2-Mar-07 15:58

It is going to be a complicated solution. I think you should just try your best and figure it out any way you can.

Ben

bernie_0112-Mar-07 16:03

2-Mar-07 16:03

ok.. i will..thanks for that.
I have another question if ok.
you are so blessed ben,

How about rowfilter using textbox and dropdown?.

Bernie

kubben2-Mar-07 16:06

2-Mar-07 16:06

The rowfilter you can use in a DataView. I can't remeber if you do vb.net or C# but it is something like this:
DataView dv = yourdatatable.DefaultView;
dv.RowFilter = "columname = "+textbox.Text;

gridview.datasource = dv;
gridview.databind();

Anyway, that is what the C# looks like.

Ben

bernie_0112-Mar-07 16:11

2-Mar-07 16:11

i got the answer Ben, just now. I just configure it in SQL data source.
thank you very much. I am just a beginner Ben thats why i am asking.

Can i have another question?..Hehe

How about computing difference of two time to be display in textbox before inserting

Bernie

kubben5-Mar-07 3:05

5-Mar-07 3:05

Here's a link that might help you with this.

ms-help://MS.VSCC.v80/MS.MSDN.v80/MS.NETDEVFX.v20.en/cpref2/html/M_System_DateTime_Subtract_1_4910510e.htm

Ben

bernie_0116-Mar-07 22:23

6-Mar-07 22:23

i cant access the link..no page display..and another question how can i validate time input hh:mm:ss using range validator, and how can i set the datetime.now in textbox gridview in edit mode.

Thanks

Bernie

kubben7-Mar-07 1:49

7-Mar-07 1:49

Here is the content of the link:
Subtracts the specified date and time from this instance.

Namespace: System
Assembly: mscorlib (in mscorlib.dll)

Syntax
Visual Basic (Declaration)
Public Function Subtract ( _
value As DateTime _
) As TimeSpan

Visual Basic (Usage)
Dim instance As DateTime
Dim value As DateTime
Dim returnValue As TimeSpan

returnValue = instance.Subtract(value)

C#
public TimeSpan Subtract (
DateTime value
)

C++
public:
TimeSpan Subtract (
DateTime value
)

J#
public TimeSpan Subtract (
DateTime value
)

JScript
public function Subtract (
value : DateTime
) : TimeSpan

Parameters
value
An instance of DateTime.

Return Value
A TimeSpan interval equal to the date and time represented by this instance minus the date and time represented by value.
Exceptions
Exception type Condition
ArgumentOutOfRangeException
The result is less than MinValue or greater than MaxValue.

Remarks
This method does not change the value of this DateTime object. Instead, a new TimeSpan is returned whose value is the result of this operation.

Before subtracting DateTime objects, insure that the objects represent times in the same time zone. Otherwise, the result will include the difference between time zones.

Example
The following code example demonstrates the Subtract method and operator.

Visual Basic Copy Code
Dim date1 As New System.DateTime(1996, 6, 3, 22, 15, 0)
Dim date2 As New System.DateTime(1996, 12, 6, 13, 2, 0)
Dim date3 As New System.DateTime(1996, 10, 12, 8, 42, 0)

Dim diff1 As System.TimeSpan
' diff1 gets 185 days, 14 hours, and 47 minutes.
diff1 = date2.Subtract(date1)

Dim date4 As System.DateTime
' date4 gets 4/9/1996 5:55:00 PM.
date4 = date3.Subtract(diff1)

Dim diff2 As System.TimeSpan
' diff2 gets 55 days 4 hours and 20 minutes.
diff2 = System.DateTime.op_Subtraction(date2, date3)

Dim date5 As System.DateTime
' date5 gets 4/9/1996 5:55:00 PM.
date5 = System.DateTime.op_Subtraction(date1, diff2)

Ben

bernie_01112-Mar-07 1:28

12-Mar-07 1:28

thanks for that friend,
I got it now.
I have new question, how can i add gridview header above header?..

Thanks

Bernie

kubben12-Mar-07 2:06

12-Mar-07 2:06

You can try to use the gridview pager template for that sort of thing.

Ben

bernie_01112-Mar-07 17:22

12-Mar-07 17:22

What are the settings to be change for me to show the header on load?. I found out that it depends on the number of rows.
Thanks

bernie

kubben13-Mar-07 2:37

13-Mar-07 2:37

In the gridview prerender event you need this kind of code:
if (!GridView1.TopPagerRow.Visible)
{
GridView1.TopPagerRow.Visible = true;
}

Ben

bernie_01113-Mar-07 15:04

13-Mar-07 15:04

this is a C# code right?how about in VB?. i tried to write as
if GridView1.TopPagerRow.Visible = false then

GridView1.TopPagerRow.Visible = true

but i got some error "Object reference not set to an instance of an object."
is that because my gridview was controlled by dropdown?.How can i do that?

Bernie

kubben13-Mar-07 15:25

13-Mar-07 15:25

You need to turn paging on. Set the page size to be really big so you only have one page.

Ben

bernie_01115-Mar-07 2:49

15-Mar-07 2:49

is that the only setting that i need? it will not display the next or previous?

Bernie

bernie_01115-Mar-07 3:02

15-Mar-07 3:02

I set the page size to 10000 but it doesnt show the pager,
I got some error in pre render event. null reference. My gridview is controlled by dropdown

Bernie

kubben15-Mar-07 3:46

15-Mar-07 3:46

You have to set up the next and previous settings for them to show up.

Ben

kubben15-Mar-07 3:45

15-Mar-07 3:45

You do need to check for Nothing before you try to do anything. The pre render actually gets called early enough that sometimes the pager hasn't be created yet.

Ben

HideDuplicates

bernie_01122-Mar-07 0:30

22-Mar-07 0:30

Hi,

I have a report viewer, I have tables on my report. I set the hideDuplicates to my dataSet, It hides the data but still adding row on below, any idea about that?. I dont want to display row without data below in my table

Thanks

Bernie

Re: HideDuplicates

kubben22-Mar-07 3:22

22-Mar-07 3:22

I would guess that some spaces are being returned or something like that so there is some data being returned. That is my best guess.

Ben

report viewer

bernie_01122-Mar-07 16:57