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Hello friends,
Here is another error which I am getting in asp.net
My task is to change the color of an image in grayscale or sepia and after that save that image to the server.
I have completed the half part of that task but in the remaining half i am getting an error.
The error is "System.ArgumentException: Invalid parameter used."
Now let me explain what i am doing is Using bitmap for changing image color and after that saving that bitmap on server at that point i am getting this error...
i am writing some of that code here:::
Public Function ConvertToGrayscale(ByVal source As Bitmap) As Bitmap
Dim bm As New Bitmap(source.Width, source.Height)
Dim x
Dim y
For y = 0 To bm.Height - 1
For x = 0 To bm.Width - 1
Dim c As Color = source.GetPixel(x, y)
Dim luma As Integer = CInt(c.R * 0.3 + c.G * 0.59 + c.B * 0.11)
bm.SetPixel(x, y, Color.FromArgb(luma, luma, luma))
Next
Next
Return bm
End Function
Public Function ConvertToSepia(ByVal source As Bitmap) As Bitmap
Dim bm As New Bitmap(source.Width, source.Height)
Dim R, G, B As Integer
Dim x
Dim y
For y = 0 To bm.Height - 1
For x = 0 To bm.Width - 1
Dim c As Color = source.GetPixel(x, y)
R = CInt(c.R * 0.393 + c.G * 0.769 + c.B * 0.189)
If R > 255 Then R = 255
G = CInt(c.R * 0.349 + c.G * 0.686 + c.B * 0.168)
If G > 255 Then G = 255
B = CInt(c.R * 0.272 + c.G * 0.534 + c.B * 0.131)
If B > 255 Then B = 255
bm.SetPixel(x, y, Color.FromArgb(R, G, B))
Next
Next
Return bm
End Function
Private Function uploadFile(ByVal oFile As System.Web.UI.HtmlControls.HtmlInputFile, ByVal cbochoose As DropDownList, ByVal txtITitle As TextBox, ByVal ControlNo As Long, ByVal CoverType As String)
Dim obm As Bitmap, obm1 As Bitmap, obm2 As Bitmap
obm = New Bitmap(oFile.Value)
obm1 = ConvertToGrayscale(obm)
obm1.Save(strFilePath & strFName_B)
obm2 = ConvertToSepia(obm)
obm2.Save(strFilePath & strFName_S)
obm.Dispose() : obm1.Dispose() : obm2.Dispose()
oFile.PostedFile.SaveAs(strFilePath & strFName & strFExt)
End Function
I don't know exactly where i am getting error... at which step...
Now tell me what will be the reason of getting that error.......
I am waiting for your reply....
please try it first and after that give the answer.
Thanks in advance................
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Read my image processing articles, this is the worst way you could create greyscale/sepia images.
Which line blows up ? Did you go through the debugger to check, for example, if the paths you're generating are valid ?
Christian Graus - Microsoft MVP - C++
"also I don't think "TranslateOneToTwoBillion OneHundredAndFortySevenMillion FourHundredAndEightyThreeThousand SixHundredAndFortySeven()" is a very good choice for a function name" - SpacixOne ( offering help to someone who really needed it ) ( spaces added for the benefit of people running at < 1280x1024 )
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hi christian,
I have solved out this problem thanks for your reply i got the answer from their.
really appreciating your way of reply.
i understand what my mistake is.
thanks for your reply.
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hi,
my web application is able open excel template on my system(server),
when i run this application on client machine(another system)
every thing works fine but excel template is not opening
can anybody knows wht i have to,
thanks
Afreen
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Is EXCEL installed on the client machine?
Regards
- J O H N -
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iam having a textbox in that i write some text and press enter then a function should execute .
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You can use AJAX to execute a server side function
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hi navaneeth how ru ... this is id by writting the code in server button click .and i called the button click in javascript like this
var obj
obj=document.getElementById("btngetdata");
obj.click();
still its not getting is any other with out using ajax
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I have created one library which will help to call button event when enter key is pressed. Check this[^] and download the library
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DefaultButton.SetDefaultButton ( control , btButton )
where i should write this one
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You can write in page load.
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txtBox1.Attributes.Add("onkeydown", "if(event.which || event.keyCode){if ((event.which == 13) || (event.keyCode == 13)) {document.getElementById('"+Button1.UniqueID+"').click();return false;}} else {return true}; ");
this is working sir thanks u sir
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jagadeeshkumar2106 wrote: how can i call code behind function through java script function (help plz)
maybe. you can use ajax.
function fireFunc() {<br />
var keyCode = event.keyCode ? event.keyCode : event.which ? event.which : event.charCode;<br />
if (keyCode == 13) {<br />
<br />
var req = false;<br />
<br />
if (window.XMLHttpRequest) {<br />
req = new XMLHttpRequest();<br />
}<br />
else if (window.ActiveXObject) {<br />
req = new ActiveXObject("Microsoft.XMLHTTP");<br />
}<br />
req.open('POST', "http://urdomain.com/urpage/aspx", true);<br />
req.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');<br />
req.onreadystatechange = function() {<br />
if (req.readyState == 4) {<br />
}<br />
}<br />
req.send("querystring");<br />
<br />
}<br />
}<br />
<br />
<br />
<input type="text" value="Check Answer" onkeypress="fireFunc()" >
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You will have to put your function/procedure in a page and this page needs to be called as specified by Michael Sync. You can send any value to it using the querystring.
Nav
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i want the code to run a procudere when enter key is pressed in asp.net apllication .the key event should happen when i press the enter key in textbox.
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Use Javascript function and call it on the server side.
TextBox1.Attributes.Add("onkeypress","CheckKeyCode();")
Validate the key as:
function CheckKeyCode()
{
if(event.keyCode == 13)
{
return true;
}
else
{
return false;
}
}
God is always with you.
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jagadeeshkumar2106 wrote: i want the code to run a procudere
this procedure is written in Javascript? if yes, chk the example below..
Example.
function fireFunc() {<br />
var keyCode = event.keyCode ? event.keyCode : event.which ? event.which : event.charCode;<br />
if (keyCode == 13) {<br />
yourprocedure();<br />
}<br />
}<br />
<br />
<br />
<input type="text" value="Check Answer" onkeypress="fireFunc()" >
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sorry. i didn't see Saranya Devi's post.
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sir the procedure is in code behind and it should call in javascript
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Call your procedure like this:
function getProcedure()
{
var obj
obj=document.getElementById("button2")
button2.click();
}
"severside_handler" is the codebehind function that hander the button's
server click event.
God is always with you.
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var obj
obj=document.getElementById("btngetdata");
obj.click();
i wrote like this and i kept two alerts before and after .but iam getting the two messages in the alert but iam not getting the this obj.click.
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Try btngetdata.click();
God is always with you.
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i posted the answer in your new post..
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Hi i am getting error as:
"Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index "
In this error occur in user control...,
In that control i have repeater control...,
In that i bind some datas from my table...,
In my main tab...,
First one contained 4 subtabs and second one contained 2 subtabs...,
Suppose if i select first main tab from that 5th subtab then if i select second main tab...,
It will show this error, becoz second one have only 2 subtabs...,
The pointer will refer the 4th tab in 2nd main tab...,
So,its out of range...,
How to show default the first subtab whenever select another maintab?,
This is my code:
Public Sub SelectSubTab(ByVal index As Integer)
If ((index < 0) _
OrElse (index > SubTabText.Count)) Then
index = 0
End If
ViewState("CurrentSubTabIndex") = index
BindData()
Dim ev As SelectionChangedEventArgs = New SelectionChangedEventArgs
ev.TabPosition = CType(ViewState("CurrentTabIndex"), Integer)
ev.SubTabPosition = index
RaiseEvent SelectionChanged(Me, ev)
End Sub
Help me...,
Regards,
Mageshh
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