0
我有一個從哪裏檢索圖像的sqlite數據庫。我必須將這些圖像顯示到Windows數據網格中。對於綁定，我有類調用聯繫人，下面在DataGridViewImageColumn中顯示圖像從Sqlite數據庫中的[Winform]
namespace ContactManager.Core
{
public class Contacts
{
private long _id = 0;
public long Id
{
get { return _id; }
set { _id = value; }
}
private string _Name = string.Empty;
public string Name
{
get { return _skypeName; }
set { _skypeName = value; }
}
private string _displayName = string.Empty;
public string DisplayName
{
get { return _displayName; }
set { _displayName = value; }
}
private long _birthday = 0;
public long BirthDay
{
get { return _birthday; }
set { _birthday = value; }
}
private string _province = string.Empty;
public string Province
{
get { return _province; }
set { _province = value; }
}
private long _phone_home = 0;
public long Phone_Home
{
get { return _phone_home; }
set { _phone_home = value; }
}
private long _phone_mobile = 0;
public long Phone_Mobile
{
get { return _phone_mobile; }
set { _phone_mobile = value; }
}
private string _mood_text = string.Empty;
public string Mood_Text
{
get { return _mood_text; }
set { _mood_text = value; }
}
private byte[] _avatar_image = new byte[4096];
public byte[] Avatar_Image
{
get{return _avatar_image;}
set{_avatar_image = value;}
}
}
}
因此，考慮我應該在這個接觸類創建什麼類型的屬性來保存圖像數據，我的第一個問題。 我正在創建datagridviewcolumns在runime。代碼是低於
DataGridViewImageColumn dgvImColAvatar = new DataGridViewImageColumn();
dgvImColAvatar.AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill;
dgvImColAvatar.HeaderText = "Avatar";
dgvImColAvatar.DataPropertyName = "Avatar";
但是當我執行應用程序它顯示我一些TargetInvocation與NullReference異常的懷疑也。 所以請幫助我從數據庫中檢索圖像數據並使用類，屬性和集合進行綁定。在他們之間，我使用MapperBase<T>自動爲屬性賦值。