[英]Loading User Control Dynamically
我的代碼如下
string[] keys = { "myCustomUserControl.ascx", "myCustomUserControl.ascx.cs", "myCustomUserControl.ascx.designer.cs" };
string customUserControlName = CommonDataCalls.GetCustomUserControlName(keys);
UserControl objUserControl = (UserControl)this.LoadControl("~/UserControls/" + userControlName);
userControlPlaceHolder.Controls.Add(objUserControl);
GetCustomUserControlName的定義如下
public string GetCustomUserControlName(string[] keys)
{
try
{
string userConrolsPhysicalPtah = System.Web.HttpContext.Current.Server.MapPath("~/UserControls/");
DataTable objDataTable = new DataTable();
foreach (string key in keys)
{
objRequestVO.addObject("ACA_KEY", key);
CResponseVO objResponseVO = (CResponseVO)objGateway.ExecuteBusinessService(CConstant.ADMIN, CConstant.ASSEMBLY_INFO, CConstant.SELECT, objRequestVO);
DataSet objDataSet = (DataSet)objResponseVO.getObject("RES_DS");
cUserTrce objGeneral = new cUserTrce();
if (!objGeneral.IsNullOrEmptyDataset(objDataSet))
{
if (objDataTable.Rows.Count == 0)
{
objDataTable = objDataSet.Tables[0].Clone();
}
objDataTable.Rows.Add(objDataSet.Tables[0].Rows[0].ItemArray);
}
}
if (objDataTable != null && objDataTable.Rows.Count == 3)
{
string containerName = "usercontrols";
foreach (DataRow dr in objDataTable.Rows)
{
string userControlFileBlobUrl = dr["ACA_ASSEMBLY_PATH"].ToString();
string userControlFileName = dr["ACA_CLASS_NAME"].ToString();
Storage.Blob blobHandler = new Storage.Blob();
Stream blobstream = blobHandler.GetBlob(userControlFileBlobUrl, containerName);
if (!(File.Exists(userConrolsPhysicalPtah + userControlFileName)))
{
MemoryStream ms = (MemoryStream)blobstream;
FileStream outStream = File.OpenWrite(userConrolsPhysicalPtah + userControlFileName);
ms.WriteTo(outStream);
outStream.Flush();
outStream.Close();
}
}
string customUserControlName = (from DataRow row in objDataTable.Rows
where row["ACA_KEY"].ToString() == keys[0]
select row["ACA_CLASS_NAME"].ToString()).First();
return customUserControlName;
}
else
{
return null;
}
}
catch
{
return null;
}
}
該方法基本上在運行時將用戶控件復制到虛擬路徑。
在aspx.cs頁面中,我嘗試動態加載它。
但是我可以看到文件正被復制到虛擬路徑。 加載控件給我一個例外,提示無法加載類型'myCustomUserControl'。
我正在使用Azure Web角色
這是怎么了
我解決了這個錯誤。 我只是在這里供任何人參考。
一個字的變化-
http://blog.kjeldby.dk/2008/11/dynamic-compilation-in-a-web-application/
更改
CodeBehind =“ myCustomUserControl.ascx.cs”
至
CodeFile =“ myCustomUserControl.ascx.cs”
感謝@Roopesh和@Kristoffer Brinch Kjeldby
它將開始工作。
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