dataset

问题 I have the following data sets in R: > closed [1] 57637 31508 54113 2348 4747 68284 61779 36654 31399 54126 11232 60659 42968 56388 5114 66289 69491 45668 879 65649 71172 36120 61802 7699 70982 [26] 65720 > length(closed) [1] 26 > stlist[1:5,] M.Type M.Code M.Name B.Code B.Name B.Region 1 5M 1759 Istanbul 5M 110007 Taksim Ist 2 5M 62461 Edirne 5M 110007 Aysekadin Ist 3 5M 69493 Tekirdag 5M 110431 Tekirdag Ist 4 5M 7516 Ankara 5M 110548 Batikent Ank 5 5M 14148 Bursa 5M 110351 Bursa Ist > nrow

问题 I have Developed Below Code for Crystal Report in ASP.NET and C# (Dataset), I have Multiple Pages in report i am getting 1st page Properly but while Navigating next page i am getting logon error. public partial class WSDayBookReport : System.Web.UI.Page { SQLClass sqlfunc = new SQLClass(); DayBookDataSet dset = new DayBookDataSet(); ReportDocument rdoc; } protected void Page_Load(object sender, EventArgs e) { } protected void Page_Unload(object sender, EventArgs e) { try { rdoc.Close(); rdoc

问题 if I have a DataSet called myDs and I edit a field in it by direct access in a loop like the following: for (int i = 0; i < myDS.Tables[TableName].Rows.Count; i++) { //some function or web method to get the id value of the record being updated int n = getNewNumber(); //updating the dataset record according to some condition if (n == 0) { myDS.Tables[TableName].Rows[i]["id"] = n; myDS.Tables[TableName].Rows[i]["description"] = "some data"; } else { myDS.Tables[TableName].Rows[i]["id"] = n;

问题 if I have a DataSet called myDs and I edit a field in it by direct access in a loop like the following: for (int i = 0; i < myDS.Tables[TableName].Rows.Count; i++) { //some function or web method to get the id value of the record being updated int n = getNewNumber(); //updating the dataset record according to some condition if (n == 0) { myDS.Tables[TableName].Rows[i]["id"] = n; myDS.Tables[TableName].Rows[i]["description"] = "some data"; } else { myDS.Tables[TableName].Rows[i]["id"] = n;

问题 I am new to BIRT, i am trying to display my BIRT report data from left to right horizontally, Default, table data fills vertically,But i would like to have exactly opposite to it,What i have to do to achieve this? My Dataset student_name student_1 student_2 student_3 My expected result would be , student_name student_1 student_2 student_3 How can i show data horizontally in BIRT? 回答1: You can achieve this using a List element bound to the dataset, instead of a table element. As shown in the

问题 This is my problem: I need to store a lot of log messages and thought it would be smart to keep it in a SQLite3 database to be able to search and filter it easily. I will display the log messages in a standard list widget (using wxWidgets). The list will have several columns and can be sorted and filtered by the user. Now, I'm not sure what is the best way to handle this. I'm thinking about some possible solutions: Read all messages to memory. When there is a new or changed log message (at a

问题 I am using the following code to export a data set to an Excel sheet. [WebMethod] public static void ExporttoExcel() { DataSet ds; productfactory pf=new productfactory(); ds = pf.getproducts(); HttpResponse response = HttpContext.Current.Response; // first let's clean up the response.object response.Clear(); response.Charset = ""; response.ContentEncoding = System.Text.Encoding.Default; // set the response mime type for excel response.ContentType = "application/vnd.ms-excel"; response

问题 I've tried to find an answer to do this online but apparently it can't be done (I mean at the app level, not database). I have a need to clear out my dataset completely and reset the primary key at the same time. Any ideas? Alternatively, one hack i can use is to reinitialize the dataset but that doesn't seem possible as well since the dataset is shared between different classes in the app (I'm creating the shared dataset in Program.cs). Thanks Farooq Update: ok i tried this: MyDataSet

问题 My database includes only Truck however my below select statment returns the rows with 'Truck' MyWebControl.Myfunction().Select("TransportationMode = '" + TRUCK + "'"); How can I make this select statement case sensitive ? 回答1: Set DataTable.CaseSensitive to True . Assuming Myfunction() returns a DataTable: string TRUCK = "trUck"; var dt = MyWebControl.Myfunction(); dt.CaseSensitive = True; dt.Select("TransportationMode = '" + TRUCK + "'"); 回答2: If you're at least on .NET 3.5 you could use

问题 My database includes only Truck however my below select statment returns the rows with 'Truck' MyWebControl.Myfunction().Select("TransportationMode = '" + TRUCK + "'"); How can I make this select statement case sensitive ? 回答1: Set DataTable.CaseSensitive to True . Assuming Myfunction() returns a DataTable: string TRUCK = "trUck"; var dt = MyWebControl.Myfunction(); dt.CaseSensitive = True; dt.Select("TransportationMode = '" + TRUCK + "'"); 回答2: If you're at least on .NET 3.5 you could use