如何使用 C# 从 sql server 检索二进制数据图像？

Question

I am developing a windows form application and I need to save and retrieve an image from an sql database. Actually I am storing the image values in a byte array but while I am retrieving data, I am not able to display the image. I have given my code below:

DataTable dtgetfeedback = Feedback.BOFeedBackRating.GetFeedBackratingcount(setFBRTID);

if (dtgetfeedback.Rows.Count > 0)
{
    gv_feedbackrating.DataSource = dtgetfeedback;
}
else
{
    gvdtgetdetail.Rows.Clear();
    DataRow drToAdd = gvdtgetdetail.NewRow();
    gvdtgetdetail.Rows.Add(drToAdd);
    gvdtgetdetail.AcceptChanges();
    gv_feedbackrating.DataSource = gvdtgetdetail;
}

Image values are stored bytearray

Answer 1

To show images based on byte arrays, assign RepositoryItemPictureEdit to the necessary column by setting the GridColumn.ColumnEdit property. In addition, set the RepositoryItemPictureEdit.PictureStoreMode property to ByteArray.

Answer 2

Refer this - Saving and loading binary images into a picture edit control

When you have stored images in byte array format then it should be byte array format during retrieval from the database. Then add Change the PictureEdit's PictureStoreMode property to ByteArray

PictureEdit1.Properties.PictureStoreMode = DevExpress.XtraEditors.Controls.PictureStoreMode.ByteArray;

Related to view of image in the cells, By default, the RepositoryItemPictureEdit.SizeMode is the PictureSizeMode.Clip enumeration value of Clip. You may set the PictureSizeMode.Squeeze value. You may also specify the picture alignment at RepositoryItemPictureEdit.PictureAlignment .

References:
Bind a byte array to a PictureEdit
byte array column to image display
How to load a picture into the repositoryitemPictureEdit
ImageEdit binding