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我有一个发布网站与MOSS 2007构建,我需要以编程方式获取页面内容。我知道我可以使用WebClient向页面发送请求,然后解析响应文本。但我想在SharePoint模型中实现,因为规模很大。如何以编程方式呈现DataFormWebPart?
我想要呈现的Web部件是DataFormWebPart,如果在浏览器中查看它们会显示正常。但是当我尝试以编程方式呈现它们时,我收到了异常。
代码:
var partMgr = siteCollection.RootWeb.GetLimitedWebPartManager(pageUrl, PersonalizationScope.Shared);
var sr = new StreamWriter(@"d:\temp\test.txt", false);
var htr = new HtmlTextWriter(sr);
foreach (WebPart part in partMgr.WebParts)
{
if (part.GetType() == new DataFormWebPart().GetType())
{
try
{
htr.WriteLine("");
part.RenderBeginTag(htr);
htr.WriteLine("");
part.RenderControl(htr);
htr.WriteLine("");
part.RenderEndTag(htr);
htr.WriteLine("");
}
catch (Exception exc)
{
htr.WriteLine("Message: " + exc.Message);
htr.WriteLine("StackTrace: " + exc.StackTrace);
htr.WriteLine("InnerException: " + (exc.InnerException == null).ToString());
}
}
}
sr.Close();
htr.Close();
输出:
<div id="g_1722aa69_d0d7_4804_83fa_c8f4a250080a">
Message: Value cannot be null. Parameter name: page
StackTrace: at System.Web.UI.WebControls.WebParts.WebPartManager.GetCurrentWebPartManager(Page page)
at Microsoft.SharePoint.WebPartPages.WebPart.Render(HtmlTextWriter writer)
at ExtractPageData.Program.Main(String[] args) in D:\DNR-Playground\ExtractPageData\ExtractPageData\Program.cs:line 49
InnerException: False
<div id="g_1115045e_b0d7_41ce_ad19_15aab0f3871d">
Message: Value cannot be null. Parameter name: page
StackTrace: at System.Web.UI.WebControls.WebParts.WebPartManager.GetCurrentWebPartManager(Page page)
at Microsoft.SharePoint.WebPartPages.WebPart.Render(HtmlTextWriter writer)
at ExtractPageData.Program.Main(String[] args) in D:\DNR-Playground\ExtractPageData\ExtractPageData\Program.cs:line 49
InnerException: False
正如你在输出看到的,标签开始呈现,但控制不能呈现由于part.Page
是null
它是一个只读属性。