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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
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Can you tell me how to use the check Constraint for that?
Bernie
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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
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ok can you teach me how to solved that? I dont know how to start my code for that.
Bernie
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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
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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
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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
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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
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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
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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
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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
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thanks for that friend,
I got it now.
I have new question, how can i add gridview header above header?..
Thanks
Bernie
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You can try to use the gridview pager template for that sort of thing.
Ben
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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
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In the gridview prerender event you need this kind of code:
if (!GridView1.TopPagerRow.Visible)
{
GridView1.TopPagerRow.Visible = true;
}
Ben
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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
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You need to turn paging on. Set the page size to be really big so you only have one page.
Ben
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is that the only setting that i need? it will not display the next or previous?
Bernie
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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
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You have to set up the next and previous settings for them to show up.
Ben
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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
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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
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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
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i have deployed my program in IIS, my report viewer works on my project but when i deployed it on IIS error was display,
An error occurred during local report processing.
The definition of the report 'Main Report' is invalid.
The report definition is not valid. Details: Data at the root level is invalid. Line 1, position 1.
Any idea about this?
thank you very much..
Bernie
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i found the solution friend. I put the data item in header or footer not in "details" and it works. my problem now is when i deploy it on IIS, the reportViewer does not work.
Bernie
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