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Hi .
Need to Convert base64 string representing header of the binary field with image data.
//ds.Tables[6].Rows[1].ItemArray[2].ToString() contains base64string
{
Byte[] byt = Convert.FromBase64String(ds.Tables[6].Rows[1].ItemArray[2].ToString());
SaveToOut("image/jpeg", byt, true);
PerformScaleImage(contentType, content, Response, 150, 50);
MemoryStream stream = new MemoryStream();
stream.Write(buff, 0, buff.Length);
using (Bitmap img = new Bitmap(stream))/*---Giving invalid parameter exception-------*/
{
--------------------------}
}
Can you give details.
Srinivas
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The error comes because you haven't reset the memory stream before reading it.
You should create a read-only memory stream from the array instead:
MemoryStream stream = new MemoryStream(buff, false);
Now the memory stream contains the data from the start, and you can read from it right away.
---
Year happy = new Year(2007);
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The error is at the line pointing to ------(A)
MemoryStream stream = new MemoryStream();
stream.Write(buff, 0, buff.Length);
------(A)
using (Bitmap img = new Bitmap(stream))/*---Giving invalid parameter exception-------*/
{
--------------------------}
}
Srinivas S
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Yes, I know that. Read my previous post again, and you might realise that.
---
Year happy = new Year(2007);
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MemoryStream stream = new MemoryStream(buff, false);
After that also its giving same one
Invalid parameter for bitmap constructor.
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I have tested it, and as expected it works just fine.
Where do you create the array buff, and what does it contain?
---
Year happy = new Year(2007);
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Hi .
Need to Convert base64 string representing header of the binary field with image data.
//ds.Tables[6].Rows[1].ItemArray[2].ToString() contains base64string
{
Byte[] byt = Convert.FromBase64String(ds.Tables[6].Rows[1].ItemArray[2].ToString());
SaveToOut("image/jpeg", byt, true);
PerformScaleImage(contentType, content, Response, 150, 50);
MemoryStream stream = new MemoryStream();
stream.Write(buff, 0, buff.Length);
using (Bitmap img = new Bitmap(stream))/*---Giving invalid parameter exception-------*/
{
--------------------------}
}
Can you give details.
Srinivas S
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|
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Hi .
Need to Convert base64 string representing header of the binary field with image data.
//ds.Tables[6].Rows[1].ItemArray[2].ToString() contains base64string
{
Byte[] byt = Convert.FromBase64String(ds.Tables[6].Rows[1].ItemArray[2].ToString());
SaveToOut("image/jpeg", byt, true);
PerformScaleImage(contentType, content, Response, 150, 50);
MemoryStream stream = new MemoryStream();
stream.Write(buff, 0, buff.Length);
using (Bitmap img = new Bitmap(stream))/*---Giving invalid parameter exception-------*/
{
--------------------------}
}
Can you give details.
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how to view power point show inside a web browser control in an application form ?
i have a powerpoint link ( local file ) , i need to make something like this :
webBrowser1.Url = new Uri(@file://c:\whatever\yourpresentation.ppt)
it doesn't work with me !!!
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where are the experts 
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Hi friends,
how to validate textbox should accept only numeric in c#.Net. Please Help.
Thanks in Advance,
Regards,
Prya
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You can override the OnKeyPress or OnValidating methods of the TextBox, if overriding the KeyPress then simply filter out the keystrokes which are not numeric. If overriding the OnValidating method then you can use int.TryParse to check to see if it's a valid integer.
There are numerous articles on the web about how to do this, the best solution in my opinion would be to override the OnKeyPress event.
I have no idea what I just said but my intentions were sincere.
Poore Design
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That will work if the user didn't use the paste feature
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Hadn't thought of that  , suppose it'll have to be either the OnValidating or OnTextChanged.
I have no idea what I just said but my intentions were sincere.
Poore Design
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to complete with a bit of code, what has been already so nicely said:
void TxtRegisteringKeyKeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e)
{
char[] myNum = new char[11] { '0' , '1', '2', '3', '4', '5', '6', '7', '8', '9', '\b' };
bool blnNumFnd = false;
foreach (char c in myNum)
{
if (e.KeyChar == c)
blnNumFnd = true;
}
if (!blnNumFnd)
e.KeyChar = '\0';
}
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Use MaskedTextBox Instead of Normal textbox, where you can restrict user entries
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Hi,
I am having Text file that contains japanese characters ,I need to look out for Hiragana, Katakana and
ideograph characters searching through Microsoft and google i found that i can do it through Regular
Expressions
http://msdn2.microsoft.com/en-us/library/aa293063(VS.71).aspx[^]
I used Hiragana and Katakana regex like this string regexPattern = @"\p{IsHiragana}|\p{IsKatakana}"; its
working fine but for Ideograph I used \p{Lo} but this doesn't work
Any Help will be highly appreciated
Thanks and regards
Shweta Shrivastava
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Hi
I am a computer engineer and I have developed some DLLs in .NET Framework 1.1 (C#.NET). Now I want to develop a new project in Visual C++ 6.0 and I need to use those DLLs in Visual C++. Would you please help me with this interoperability? I need a good and of course abstract resource in order to become familiar with these concepts and with the method I have to use for this transfer.
Thanks in advance
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Tried Google[^]?
Surprise surprise where the first result it returned from... 
I have no idea what I just said but my intentions were sincere.
Poore Design
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hi,
In my windows application i added a menu strip item. The default color of the menu strip is the colors of the windows xp (blue and white).
When i change the backgroung color property to the color i want it is changed.
but when i click on an item for example File the menu that pops down under it has the color of the original menu strip (blue and white). I need it to be as the color i set. I couldn't find any property for that.
Is there a way to do it?
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This code works for me.
MenuStrip mainmenu;
ToolStripMenuItem File;
ToolStripMenuItem News;
ToolStripMenuItem Exit;
mainmenu = new MenuStrip();
File = new ToolStripMenuItem();
News = new ToolStripMenuItem();
Exit = new ToolStripMenuItem();
mainmenu.BackColor = Color.Red;
mainmenu.ForeColor = Color.Yellow;
File.BackColor = Color.Violet;
File.ForeColor = Color.Cyan;
News.BackColor = Color.DarkBlue;
News.ForeColor = Color.DarkGreen;
Exit.BackColor = Color.DarkViolet;
Exit.ForeColor = Color.DeepPink;
File.Text = "File";
News.Text = "News";
Exit.Text = "Exit";
File.DropDownItems.Add(News);
File.DropDownItems.Add(Exit);
mainmenu.Items.Add(File);
this.Controls.Add(mainmenu);
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hi,
it is not working completly
it works fine until i click of one of the main items (File menu item).
then this item changes back to the original colors, but the items under it doesn't change, They keep the color i gave to them.
do you know how to solve this
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I myself was having same problem while selecting a treenode. that if i set its backgrout color or foreground color then its fine and it works but i want that when ever i select the node then the default windows color apear(blue,olive or grey) and i want a different color to apear so how to do so??
its same problem i guess only control is different
i will try sugestion of menu strip as well!
thax in advance!
sam tam
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