public void GetDataItem_Exception ()
{
Page p = new Page ();
p.GetDataItem ();
}
/// <summary>
/// 获取数据绑定上下文数据项。
/// </summary>
/// <typeparam name="T">对象类型</typeparam>
/// <param name="page">页面</param>
public static T GetDataItem <T>(this System.Web.UI.Page page)
{
return((T)page.GetDataItem());
}
protected internal IEnumerable XPathSelect(string xpathexpression)
{
return(XPathBinder.Select(Page.GetDataItem(), xpathexpression));
}
protected internal IEnumerable XPathSelect(string xpathexpression, IXmlNamespaceResolver resolver)
{
return(XPathBinder.Select(Page.GetDataItem(), xpathexpression, resolver));
}
protected internal string XPath(string xpathexpression, string format)
{
return(XPathBinder.Eval(Page.GetDataItem(), xpathexpression, format));
}
protected internal string XPath(string xpathexpression, string format, IXmlNamespaceResolver resolver)
{
return(XPathBinder.Eval(Page.GetDataItem(), xpathexpression, format, resolver));
}
protected internal object XPath(string xpathexpression)
{
return(XPathBinder.Eval(Page.GetDataItem(), xpathexpression));
}
protected internal object XPath(string xpathexpression, IXmlNamespaceResolver resolver)
{
return(XPathBinder.Eval(Page.GetDataItem(), xpathexpression, null, resolver));
}
protected internal object Eval(string expression)
{
return(DataBinder.Eval(Page.GetDataItem(), expression));
}
protected internal string Eval(string expression, string format)
{
return(DataBinder.Eval(Page.GetDataItem(), expression, format));
}
/// <devdoc>
/// Simplified databinding XPathSelect() method. This method uses the current data item and a namespace resolver
/// to evaluate an XPath expression that returns a node list using XPathBinder.Select().
/// The data item is retrieved using either the IDataItemContainer interface or by looking for a property called 'DataItem'.
/// If the data item is not found, an exception is thrown.
/// </devdoc>
protected internal IEnumerable XPathSelect(string xPathExpression, IXmlNamespaceResolver resolver)
{
CheckPageExists();
return(XPathBinder.Select(Page.GetDataItem(), xPathExpression, resolver));
}
/// <devdoc>
/// Simplified databinding XPathSelect() method. This method uses the current data item to evaluate an XPath expression that returns a node list using XPathBinder.Select().
/// The data item is retrieved using either the IDataItemContainer interface or by looking for a property called 'DataItem'.
/// If the data item is not found, an exception is thrown.
/// </devdoc>
protected internal IEnumerable XPathSelect(string xPathExpression)
{
CheckPageExists();
return(XPathBinder.Select(Page.GetDataItem(), xPathExpression));
}
/// <devdoc>
/// Simplified databinding XPath() method with a format expression. This method uses the current data item and a namespace resolver
/// to evaluate an XPath expression using XPathBinder.Eval().
/// The data item is retrieved using either the IDataItemContainer interface or by looking for a property called 'DataItem'.
/// If the data item is not found, an exception is thrown.
/// </devdoc>
protected internal string XPath(string xPathExpression, string format, IXmlNamespaceResolver resolver)
{
CheckPageExists();
return(XPathBinder.Eval(Page.GetDataItem(), xPathExpression, format, resolver));
}
/// <devdoc>
/// Simplified databinding XPath() method with a format expression. This method uses the current data item to evaluate an XPath expression using XPathBinder.Eval().
/// The data item is retrieved using either the IDataItemContainer interface or by looking for a property called 'DataItem'.
/// If the data item is not found, an exception is thrown.
/// </devdoc>
protected internal string XPath(string xPathExpression, string format)
{
CheckPageExists();
return(XPathBinder.Eval(Page.GetDataItem(), xPathExpression, format));
}
/// <devdoc>
/// Simplified databinding XPath() method. This method uses the current data item to evaluate an XPath expression using XPathBinder.Eval().
/// The data item is retrieved using either the IDataItemContainer interface or by looking for a property called 'DataItem'.
/// If the data item is not found, an exception is thrown.
/// </devdoc>
protected internal object XPath(string xPathExpression)
{
CheckPageExists();
return(XPathBinder.Eval(Page.GetDataItem(), xPathExpression));
}