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Hey.
I've created a control which allows users to draw "tiles" onto a canvas, and supports multiple layers.
I've been running diagnostic time checks on each of these. The problem is, the system draws "previews" (50% transparency images of the other layers) when another layer is selected, so the person can see where the other tiles/sprites are on the canvas.
I have it set so that only the region of the canvas where a sprite has been painted is invalidated and updated when the user paints onto the canvas. But the problem is that it still requires quite a bit of rendering.
I have set DoubleBuffering to true, enabled OptimizedDoubleBuffering, AllPaintInWmPaint etc. Here are some times:
When drawing the entire map without transparency on layers: 0.23 seconds.
When drawing one layer, other layers with transparency: 0.8 seconds.
When painting a tile onto part of a layer: 0.26 seconds.
This might seem moderately fast for a drawing system, but for some reason the drawing is lagging. The painting itself isn't lagging at all, but it's the rendering the output onto the control that seems to take a while. You see, I have a selector box that's 2px wide rectangle that follows the mouse on the map to show where the sprite will be painted, and it takes a while to update the position.
Is there any way I could speed up the processing of my control? I know it's a hefty load to be drawing onto a control (especially 3~4 layers, where 2~3 of them are drawn with 50% transparency), but there are other editors which perform the same function and don't lag at all (or atleast take around 0.2 seconds to render transparent layers.
Edit
Just as a point of interest, would it speed up my processing if I split each layer into seperate controls, placed on top of each other on my main edit control, then drawing each layer seperately on each control, rather than having them all parsed in the same control?
Thanks ~ Chris.
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Dear All :
When I put the tablelayoutpanel into usercontrol.
If this usercontrol allow developer adjust usercontrol.tablelayoutpanel row / column size into design-time
Can anyone help me teach me how to do it ?
As [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)] is only work in property
Thanks
Michael 
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I'm having trouble on how am going to start this idea of mine. I have an image and I want to plot points on that image. My Idea is to get the X and Y coordinates of the mouse pointer and save it into a text file so that by the time I re-run the program again, the plotted points is still there. But it seems like this is not a good idea since everything will be messed up if I load the program to a computer with different screen size. I was thinking of placing an invisible grid, but looks like this will be tough to do.
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Silvyster wrote: But it seems like this is not a good idea since everything will be messed up if I load the program to a computer with different screen size.
Why don't you store the coordinates in a coordinate space that is independent of the screen size, like relative to the image size?
modified 12-Sep-18 21:01pm.
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how to get the unknown values from the database and corresponding textboxes for that values at run time
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Unknown values are stored as NULL in a database. When you fetch the value, it is represented as System.DBNull[^]. In windows forms, the TextBox.Text however cannot contain a null value so it must be converted to an empty string.
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hai all,
we used crystal report graphs in windows application ,in this we have problem with @ symbol i.e, appearing in legend text.So we want remove @ symbol from legend.We are strucking with this from two days
could you please help me.
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In my form I use Microsoft Web Browser that support NewWindow2 event.
In habitual WebBrowser object there are properties that do what i need but in Microsoft Web Browser i can not find this properties.
1)I need to disable scroll bars.
2)I need to disable menu of right click.
3)I need to disable option of 3 mouse button in browser.
How do I do this in Microsoft Web Browser?
p.s. I create programm that has small web browser (50x50 px) and i need that user only can do left click in the browser.
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You can use webBrowser1.ScrollBarsEnabled = false; in .NET. As for right click I'd do it with javascript on the actual page, haven't a clue how to do it with code.
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Can you write me this javascript code please?
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Microsoft Web Browser have not ScrollBarsEnabled property.
I speak about browser that described here
http://support.microsoft.com/kb/815714
It is another WebBrowser, not habitual web browser from ToolBar.
It is located here - COM Components-Microsoft Web Browser.
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how can i find the checkbox is checked or not.....
present inside the datagridview...
send me sample coding..
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Checkbox must be in some ItemTemplatefield in gridview.It must be server side.Get the control by its ID in cs file and find whether it is checked or not.
Cheers!!
Brij
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Refer Below snippet
bool bflag;
checkbox chk=-(checkbox)datagridview1.cell[2].findcontrol("checkbox1");
bflag=chk.checked;
find the checkbox control in the gridview in the particular cell. Now as per above code the chk is your control name.You can use the chk.checked property for your purpose.
Regards,
Suyash
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hi,
i have a file with Hebrew letters.
while reading the file with:
string s;
SreamReader SR=new StreamReader(Dir);
s= SR.readLine();
the string contains: ����� (something strange) and not hebrew letters.
how can i receive hebew letters?
i have Microsoft Visual Studio 2008
thank you
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Is your file Unicode? And where do you get this strange output. Keep in mind that you won't get correct Unicode output in console (try to output in a Label for instance).
If your file is not Unicode, try passing the Hebrew encoding to the StreamReader constructor.
Regards,
Lev
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tinase leishtamesh be ASCI.
yahol lehiot she ze yazor leha:
TcpClient newClient;
byte[] bytes = new byte[1024];
ns = newClient.GetStream();
bytesRead = ns.Read(bytes, 0, bytes.Length);
message = Encoding.ASCII.GetString(bytes, 0, bytesRead);
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The answer you provide might be valuable for a lot of people, so please, answer in English.
Regards,
Lev
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Ok  Did it help you?
Try to use ASCI code.
In the past i created chat(server and client) that get stream(text) from tcp connection and show it in textbox.
TcpClient newClient;
NetworkStream ns;
string message=" ";
byte[] bytes = new byte[1024];
ns = newClient.GetStream();
bytesRead = ns.Read(bytes, 0, bytes.Length);
message = Encoding.ASCII.GetString(bytes, 0, bytesRead);
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Hi all
I am encrypting my password using md5 algo to store in sql server..
While retriving the password the esacpe sequence "\r" is replaced "\\r".
thus the 2 password doesnt match.
i tried to check for \\ at the rertival string and replace it with \ using string.replace also tried to resolve the problem using regex..
It doesnt work for me..
thx in advance.
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After encrypt before saving to database,encode it in 64 bit and then save it.and do vice versa after retrieving from DB.By this you won't get this type of issue.When get resolved ,let me know too.
Cheers!!
Brij
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Thx for the immediate solution ...
This has resolved my problem
Tejesh
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k
Cheers!!
Brij
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