Error using Custom Field Property for PictureBox

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Error using Custom Field Property for PictureBox

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Chris Diesel	Chris Diesel posted 7 Years Ago Topic Details Share Topic
Group: StrataFrame Users Posts: 74, Visits: 300	I get this error I believe during binding of a Custom Field Property to your PictureBox control. If I break execution right before the field value is returned, it looks correct. Error: An error occurred while refreshing the data from field 'IwbProduct.PrimaryImage' to property 'Image' on control '.' Inner Exception: Cannot format the value to the desired type. #region Custom Field Properties [Description("Primary Image"), Browsable(false), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)] public byte[] PrimaryImage { get { byte[] primaryImage = new byte[0]; if (this.Count > 0 && this.CurrentRow != null) { using (IwbProductImages iwbProductImages = new IwbProductImages()) { primaryImage = iwbProductImages.GetPrimaryImage(this.Guid); } } return primaryImage; } } #endregion /// <summary> /// Provider property descriptors for the custom bindable fields /// </summary> protected override MicroFour.StrataFrame.Business.FieldPropertyDescriptor[] GetCustomBindablePropertyDescriptors() { //-- Return the array of property descriptors return new MicroFour.StrataFrame.Business.FieldPropertyDescriptor[] { new ReflectionPropertyDescriptor("PrimaryImage", typeof(IwbProduct)) }; } Thanks, Chris Tags CFP PictureBox Binding
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StrataFrame Team	S StrataFrame Team posted 7 Years Ago Post Details Share Post
S Group: StrataFrame Developers Posts: 3K, Visits: 2.5K	The Image property on the PictureBox is a System.Drawing.Bitmap, not a byte[]. You'll need to change the property to return a System.Drawing.Bitmap. You'll then need to convert your byte[] to a Bitmap using by wrapping it in a MemoryStream. public System.Drawing.Bitmap PrimaryImage { get { if (this.Count > 0 && this.CurrentRow != null) { using (IwbProductImages iwbProductImages = new IwbProductImages()) { using(MemoryStream ms = new MemoryStream(iwbProductImages.GetPrimaryImage(this.Guid))) { return new System.Drawing.Bitmap(ms); } } } return null; } }
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Chris Diesel	Chris Diesel posted 7 Years Ago Post Details Share Post
Group: StrataFrame Users Posts: 74, Visits: 300	Thank you so much!!!!
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Chris Diesel	Chris Diesel posted 7 Years Ago Post Details Share Post
Group: StrataFrame Users Posts: 74, Visits: 300	That worked great when there is an image to display. Having problems dealing with no image though. I get the same error listed above when it returns null. Any ideas on that? Thanks!!!
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StrataFrame Team	S StrataFrame Team posted 7 Years Ago Post Details Share Post
S Group: StrataFrame Developers Posts: 3K, Visits: 2.5K	Any time the property get throws an error during binding, it wraps it in the binding exception that you're getting. You'll need to store off the data into a byte[] and check it's length to make sure there's actually data. While you're at it, you might as well catch any exceptions and return a placeholder if you encounter one. public System.Drawing.Bitmap PrimaryImage { get { if (this.Count > 0 && this.CurrentRow != null) { try { using (IwbProductImages iwbProductImages = new IwbProductImages()) { byte[] imageData = iwbProductImages.GetPrimaryImage(this.Guid); if ((imageData?.Length ?? 0) > 0) { using(MemoryStream ms = new MemoryStream(imageData)) { return new System.Drawing.Bitmap(ms); } } else { //-- There is no image, so return either nothing or a placeholder return null; //return My.Resources.NoImagePlaceholder; } } catch { //-- There was some error loading the image, so return either nothing or a placeholder return My.Resources.ErrorImagePlaceholder; //return null; } } //-- No current row in the BO return null; } }
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