这是添加新项目的代码...
private KrystalCafeDatabaseEntities kce = new KrystalCafeDatabaseEntities();
private Byte[] byteBLOBData;
public AddItem()
{
InitializeComponent();
cmbCategory.DataSource = kce.tblItemTypes;
cmbCategory.DisplayMember = "Name";
cmbCategory.ValueMember = "ItemType";
}
private void btnUpload_Click(object sender, EventArgs e)
{
DialogResult result = openFileDialog1.ShowDialog();
if (result == DialogResult.OK)
{
FileStream fsBLOBFile = new FileStream(openFileDialog1.FileName, FileMode.Open, FileAccess.Read);
byteBLOBData = new Byte[fsBLOBFile.Length];
fsBLOBFile.Read(byteBLOBData, 0, byteBLOBData.Length);
fsBLOBFile.Close();
MemoryStream stmBLOBData = new MemoryStream(byteBLOBData);
pbImage.Image = Image.FromStream(stmBLOBData);
}
}
private void btnSave_Click(object sender, EventArgs e)
{
tblItem Item = new tblItem();
Item.Name = txtName.Text;
Item.Price = decimal.Parse(txtPrice.Text);
Item.Image = byteBLOBData;
Item.ItemType = (int)cmbCategory.SelectedValue;
kce.AddTotblItems(Item);
kce.SaveChanges();
MessageBox.Show("Record Saved! :D");
}
}
}
程序运行正常，但数据只会存储一段时间，然后如果我关闭程序或编辑我的代码，我刚刚添加的数据将丢失。