public override IExpression Evaluate(IExpressionContext ctx)
{
if (ctx == null)
{
throw new NullReferenceException("Cannot resolve variable without a context");
}
var rawValue = ctx.ResolveVariable(_variable);
var constValue = rawValue as IValueType;
return(constValue ?? ValueTypeConverter.ConvertTo(rawValue));
}
/// <summary>
/// 处理Excel块粘贴功能
/// </summary>
/// <param name="view"></param>
/// <param name="e"></param>
/// <param name="bAllowAutoNewRows">允许自动新增行</param>
/// <param name="bCanPaste">是否允许填充某字段</param>
public static void PasteBlockData(this IDynamicFormView view, EntityBlockPastingEventArgs e, bool bAllowAutoNewRows = false, Func <FieldAppearance, int, bool> bCanPaste = null)
{
if (e.BlockValue.IsNullOrEmptyOrWhiteSpace())
{
return;
}
FieldAppearance startFieldAp = view.LayoutInfo.GetFieldAppearance(e.StartKey);
if (startFieldAp == null || (startFieldAp.Field.Entity is EntryEntity) == false)
{
return;
}
EntryEntity entryEntity = (EntryEntity)startFieldAp.Field.Entity;
int iTotalRows = view.Model.GetEntryRowCount(entryEntity.Key);
var copyOperation = view.BillBusinessInfo.GetForm().FormOperations
.FirstOrDefault(o => o.OperationId == 31 && string.Equals(o.Parmeter.OperationObjectKey, entryEntity.Key, StringComparison.InvariantCultureIgnoreCase));
bool isCopyLinkEntry = false;
//如果表格未配置复制行操作，则不允许自动新增行
if (copyOperation == null)
{
bAllowAutoNewRows = false;
}
else
{
isCopyLinkEntry = GetIsCopyLinkEntryParam(copyOperation.Parmeter);
}
string[] strBlockDataRows = e.BlockValue.Split(new char[] { '\n' }, StringSplitOptions.RemoveEmptyEntries);
int iRow = e.StartRow;
foreach (var rowData in strBlockDataRows)
{
if (iRow >= iTotalRows)
{
if (bAllowAutoNewRows)
{
view.Model.CopyEntryRow(entryEntity.Key, iRow - 1, iRow, isCopyLinkEntry);
}
else
{
break;
}
}
string[] strItemValues = rowData.Split(new char[] { '\t' });
FieldAppearance fieldAp = startFieldAp;
foreach (var value in strItemValues)
{
if (fieldAp == null)
{
continue;
}
object objValue = value;
if (typeof(ValueType).IsAssignableFrom(fieldAp.Field.GetPropertyType()))
{
if (value.IsNullOrEmptyOrWhiteSpace())
{
objValue = 0;
}
else
{
ValueTypeConverter converter = new ValueTypeConverter();
if (value != null && converter.CanConvertTo(value.GetType()))
{
objValue = converter.ConvertTo(value, fieldAp.Field.GetPropertyType());
}
}
}
if (bCanPaste == null || bCanPaste(fieldAp, iRow))
{
(view as IDynamicFormViewService).UpdateValue(fieldAp.Key, iRow, objValue);
}
fieldAp = GetNextEditFieldAp(view, fieldAp, iRow);
}
iRow++;
}
}
