如何将我的应用程序扩展到新的视网膜4.5 1136x640分辨率？(How to scale my app to new retina 4.5 1136x640 resolution?)

 首先，您要在DataGridView自动生成列吗？ 如果是这样，请编码： 
 
IList<HistoryItem> history = _currentCustomer.HistoryItems;
dgvCustomerHistory.AutoGenerateColumns = true;
dgvCustomerHistory.DataSource = history;  
 
 如果没有，那就像： 
 
IList<HistoryItem> history = _currentCustomer.HistoryItems;
dgvCustomerHistory.AutoGenerateColumns = false;

DataGridViewTextBoxColumn column = new DataGridViewTextBoxColumn();
column.HeaderText = "Communication Type";
column.DataPropertyName = "TypeOfCommunication"; // Name of property
dgvCustomerHistory.Columns.Add(column);

dgvCustomerHistory.DataSource = history;  
 
 我想你只需要为CommunicationTypeConverter添加一些更多的覆盖。 您只处理ConvertFrom方法，您需要处理ConvertTo方法和CanConvert方法。 
 
    public class CommunicationTypeConverter : TypeConverter
    {
        public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
        {
            return sourceType == typeof(string) || base.CanConvertFrom(context, sourceType);
        }

        public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType)
        {
            return destinationType == typeof(string) || base.CanConvertTo(context, destinationType);
        }

        public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
        {
            if (value is string)
            {
                switch ((string)value)
                {
                    case "OUTGOING_EMAIL":
                        return CommunicationType.OutgoingEmail;
                    default:
                        return CommunicationType.OutgoingCall;
                }
            }
            return base.ConvertFrom(context, culture, value);
        }

        public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
        {
            if (destinationType == typeof(string))
            {
                if (value is CommunicationType)
                {
                    switch ((CommunicationType)value)
                    {
                        case CommunicationType.OutgoingEmail:
                            return "OUTGOING_EMAIL";
                        default:
                            return "OUTGOING_CALL";
                    }
                }
            }
            return base.ConvertTo(context, culture, value, destinationType);
        }
    }
 
 然后，您可以返回图像/图标而不是字符串。 只需确保更新相应的Convert和CanConvert部分。 

To start, do you want to auto generate the columns in the DataGridView? If so, code it like:
 
IList<HistoryItem> history = _currentCustomer.HistoryItems;
dgvCustomerHistory.AutoGenerateColumns = true;
dgvCustomerHistory.DataSource = history;  
 
if not, do it like:
 
IList<HistoryItem> history = _currentCustomer.HistoryItems;
dgvCustomerHistory.AutoGenerateColumns = false;

DataGridViewTextBoxColumn column = new DataGridViewTextBoxColumn();
column.HeaderText = "Communication Type";
column.DataPropertyName = "TypeOfCommunication"; // Name of property
dgvCustomerHistory.Columns.Add(column);

dgvCustomerHistory.DataSource = history;  
 
I think you just need to add some more overrides to the CommunicationTypeConverter. You only were handling the ConvertFrom method, you need to handle the ConvertTo method and the CanConvert methods.
 
    public class CommunicationTypeConverter : TypeConverter
    {
        public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
        {
            return sourceType == typeof(string) || base.CanConvertFrom(context, sourceType);
        }

        public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType)
        {
            return destinationType == typeof(string) || base.CanConvertTo(context, destinationType);
        }

        public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
        {
            if (value is string)
            {
                switch ((string)value)
                {
                    case "OUTGOING_EMAIL":
                        return CommunicationType.OutgoingEmail;
                    default:
                        return CommunicationType.OutgoingCall;
                }
            }
            return base.ConvertFrom(context, culture, value);
        }

        public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
        {
            if (destinationType == typeof(string))
            {
                if (value is CommunicationType)
                {
                    switch ((CommunicationType)value)
                    {
                        case CommunicationType.OutgoingEmail:
                            return "OUTGOING_EMAIL";
                        default:
                            return "OUTGOING_CALL";
                    }
                }
            }
            return base.ConvertTo(context, culture, value, destinationType);
        }
    }
 
You can then return images/icons instead of strings. Just make sure you update both the appropriate Convert and CanConvert sections.