Hi,

I have used the below code to get a bitmap. from the resourcemanager. How can I throw an exception if the image name from the database does not correspond with the image name in resource manager? Currently it will just leave a transparent space on the toolstripbutton.

You can access resource by name through: ResourceManager.GetObject(String name);

For example:
Bitmap buttonA = (Bitmap)Properties.Resources.ResourceManager.GetObject("mybuttonA");

Hi Scorgi,

The code snippet below shows three methods, you can only select one of them:
//1. Throw an exception.
throw new ArgumentException(msg);
//2. Show a message.
MessageBox.Show(msg);
//3. Bind a default bitmap to the button.
map = (Bitmap)Properties.Resources.ResourceManager.GetObject("default");

For example, if you want to show an exception if the image is null, please follow:
//1. Throw an exception.
throw new ArgumentException(msg);

Regards,
Aland Li

---

Please mark the replies as answers if they help and unmark if they don't. This can be beneficial to other community members reading the thread.

Hi Scorgi,

You said Currently it will just leave a transparent space on the toolstripbutton.
It is because if a image does not exist, it would return null. In other words, the bitmap buttonA would be null.

From my experience, there are three ways to cope with such a case:
1. Throw an exception.
2. Show a message.
3. Bind a default bitmap to the button.
This is the code snippet:
Let me know if this does not help.
Aland Li

---

Please mark the replies as answers if they help and unmark if they don't. This can be beneficial to other community members reading the thread.

Hi Aland,

Thank you very much!

I have used the property image as this.

 tsbtn.Image = (Bitmap)Properties.Resources.ResourceManager.GetObject(toolrtStrip.IconName);

When I try to use your code I get unreachable code messagebox.show.

Hope you can help.

I appreciate it very much.

Hi Scorgi,

Can the image referenced by toolrtStrip.IconName be found in the main resources? Could you please provide more information about the error?

Regards,
Aland Li

---

Please mark the replies as answers if they help and unmark if they don't. This can be beneficial to other community members reading the thread.

tsbtn.Image = (Bitmap)Properties.Resources.ResourceManager.GetObject(toolrtStrip.IconName);
                        
                        
                            if (tsbtn.Image == null)
                            {
                                string msg = string.Format("The image was not found! {0}", toolrtStrip.IconName);

                                throw new ArgumentException(msg);
                                MessageBox.Show(msg);
                                //3. Bind a default bitmap to the button.
                                tsbtn.Image = (Bitmap)Properties.Resources.ResourceManager.GetObject("default");


                            }

Hi Alan,

yes the image can be referenced by toolrrStrip.IconName. The total code is as follows.

I receive a warning for MessageBox.Show unreachable code detected.

Hi Scorgi,

The code snippet below shows three methods, you can only select one of them:
//1. Throw an exception.
throw new ArgumentException(msg);
//2. Show a message.
MessageBox.Show(msg);
//3. Bind a default bitmap to the button.
map = (Bitmap)Properties.Resources.ResourceManager.GetObject("default");

For example, if you want to show an exception if the image is null, please follow:
//1. Throw an exception.
throw new ArgumentException(msg);

Regards,
Aland Li

---

Please mark the replies as answers if they help and unmark if they don't. This can be beneficial to other community members reading the thread.

Hi Aland,

Thank you very much