I am using SharePoint 2010. I created web-part where there is report viewer control. On the page load of the control. I am writing below codes to load report from definition. Web part is not giving any error but also not lading report. I tried to make physical report file from my stream and I found that report is correct.But I don't know what is missing.protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { Assembly assembly = Assembly.Load("Reports, Version=1.0.0.0, Culture=neutral, PublicKeyToken=f51c855eec632536"); Stream stream = assembly.GetManifestResourceStream("Reports.Reports.rdlc"); MemoryStream rdl = new MemoryStream(); CopyTo(stream, rdl); rptInspectorPlan.Reset(); rptInspectorPlan.LocalReport.LoadReportDefinition(rdl); rptInspectorPlan.LocalReport.DataSources.Clear(); rptInspectorPlan.LocalReport.DataSources.Add(new ReportDataSource("MyData", finalData(getInspectionPlan()))); rptInspectorPlan.LocalReport.Refresh(); } } protected DataTable getInspectionPlan() { DataTable dt = new DataTable(); DataTable dtCurrentUser = getCurrentUser(); using (SPSite site = new SPSite(getMarketSurveillanceURL())) { using (SPWeb web = site.OpenWeb()) { SPList list = web.Lists.TryGetList("InspectionPlan"); SPQuery oQuery = new SPQuery(); string query = "<Where><Eq><FieldRef Name='Title'/><Value Type='Text'>" + dtCurrentUser.Rows[0]["ID"].ToString() + "</Value></Eq></Where>";//getCurrentUserID() oQuery.Query = query; dt = list.GetItems(oQuery).GetDataTable(); } } return dt; } protected string getMarketSurveillanceURL() { string URL = ConfigurationManager.AppSettings["MarketSurveillanceURL"].ToString(); return URL; } protected string getMainSiteURL() { string URL = ConfigurationManager.AppSettings["MainSiteURL"].ToString(); return URL; } protected DataTable getCurrentUser() { SPUser user = SPContext.Current.Web.CurrentUser; DataTable currentUser = new DataTable(); using (SPSite site = new SPSite(getMarketSurveillanceURL())) { using (SPWeb web = site.OpenWeb()) { SPList list = web.Lists.TryGetList("Inspector"); SPQuery oQuery = new SPQuery(); string query = "<Query><Where><Eq><FieldRef Name='LoginID'/><Value Type='Text'>" + user.LoginName + "</Value></Eq></Where></Query>"; oQuery.ViewFields = "<FieldRef Name='ID'/><FieldRef Name='Title'/>"; oQuery.Query = query; currentUser = list.GetItems(oQuery).GetDataTable(); } } return currentUser; } protected DataTable finalData(DataTable inspectionPlan) { DataTable dt = inspectionPlan; DataTable dtCurrentUser = getCurrentUser(); dt.Columns.Add("InspectorName"); dt.Columns.Add("ProductName"); dt.Columns.Add("CategoryName"); dt.Columns.Add("InspectionTypeName"); foreach (DataRow dr in dt.Rows) { if (dr["Title"].ToString() == dtCurrentUser.Rows[0]["ID"].ToString()) dr["InspectorName"] = dtCurrentUser.Rows[0]["Title"].ToString(); dr["ProductName"] = getProductName(dr["ProductID"].ToString()); dr["CategoryName"] = getCategoryName(dr["ProductID"].ToString()); switch (dr["InspectionType"].ToString()) { case "0": dr["InspectionTypeName"] = "Periodic"; break; case "1": dr["InspectionTypeName"] = "ComplainFollowup"; break; } } dt.AcceptChanges(); return dt; } protected string getProductName(string id) { string productName = ""; DataTable dt = new DataTable(); using (SPSite site = new SPSite(getMarketSurveillanceURL())) { using (SPWeb web = site.OpenWeb()) { SPList list = web.Lists.TryGetList("Product"); SPQuery oQuery = new SPQuery(); string query = "<Where><Eq><FieldRef Name='ID'/><Value Type='Text'>" + id + "</Value></Eq></Where>";//getCurrentUserID() oQuery.ViewFields = "<FieldRef Name='ProductEN'/><FieldRef Name='ProductAr'/>"; oQuery.Query = query; dt = list.GetItems(oQuery).GetDataTable(); } } foreach (DataRow dr in dt.Rows) { productName = dr["ProductEN"].ToString(); } return productName; } protected string getCategoryName(string productID) { string categoryName = "", CategoryID = ""; DataTable dtCategory = new DataTable(); DataTable dtProduct = new DataTable(); using (SPSite site = new SPSite(getMarketSurveillanceURL())) { using (SPWeb web = site.OpenWeb()) { SPList list = web.Lists.TryGetList("Product"); SPQuery oQuery = new SPQuery(); string query = "<Where><Eq><FieldRef Name='ID'/><Value Type='Counter'>" + productID + "</Value></Eq></Where>"; oQuery.ViewFields = "<FieldRef Name='CategoryID'/>"; oQuery.Query = query; dtProduct = list.GetItems(oQuery).GetDataTable(); } } foreach (DataRow dr in dtProduct.Rows) { CategoryID = dr["CategoryID"].ToString(); } using (SPSite site = new SPSite(getMainSiteURL())) { using (SPWeb web = site.OpenWeb()) { SPList list = web.Lists.TryGetList("SAS_Categories"); SPQuery oQuery = new SPQuery(); string query = "<Where><Eq><FieldRef Name='ID'/><Value Type='Text'>" + CategoryID + "</Value></Eq></Where>"; oQuery.ViewFields = "<FieldRef Name='Category_Title_EN'/><FieldRef Name='Category_Title_Ar'/>"; oQuery.Query = query; dtCategory = list.GetItems(oQuery).GetDataTable(); } } foreach (DataRow dr in dtCategory.Rows) { categoryName = dr["Category_Title_EN"].ToString(); } return categoryName; } public static void CopyTo(Stream input, MemoryStream output) { byte[] buffer = new byte[16 * 1024]; // Fairly arbitrary size int bytesRead; while ((bytesRead = input.Read(buffer, 0, buffer.Length)) > 0) { output.Write(buffer, 0, bytesRead); } }