DateTime borrowDate = Convert.ToDateTime(DateTime.Now.ToShortDateString()); DataTable table = new DBUtility.bookType().GetTableByBookBarCode(bookcode); double borrowday; double getday = 0d; if (table != null && table.Rows.Count > 0) { if (double.TryParse(table.Rows[0]["borrowday"]....
我有一个ac#函数,该函数从Datatable中读取文件位置,并将包含所有文件标记的List返回给调用方法。 在该Catch块中,我想返回一个带有false的空列表,以便调用方法可以取消其操作。 但是我无法return编译我的陈述。 最好将列表作为引用传递,并让该函数返回布尔值true/false?
Through the ASP.NET AJAX technology experiment and uses the way that DataTable is transformed to Generic collection object from ASP.NET AJAX and then return to client JavaScript.It has a conclusion that the DataTable of asynchronous refresh technology can returned to the client.It has great refer...
ASP.NET MVC 5 - Getting Table row data when click - after it has been populated by Ajax/Json ASP.NET MVC 5 - Server Error in '/' Application ASP.Net MVC 5 - Upload Image & PDF, Save to Database & Save to Database to selected value in my dropdownlist ASP.Net MVC 5 - Upload I...
How to get result od dataTable from Linq query? I have typied DataSet and I want to join couple of tables. And I have a problem with change this result to DataTable type. (I don't want to rewrite everything in foreach) The standard libraries do not contain such a functionality, but...
using (DataTable dt = new DataTable()) { sda.Fill(dt); return dt; //i need this return value on another page load } } } } } } PAGE2: protected void Page_Load(object sender, EventArgs e) { if (!this.IsPostBack) { //Populating a DataTable from database. ...
举个例子: 从数据库读数据 返回 DataTable 值。vardata = conn.ExecuteDataTable(sql,"Datatable"); 如果A列在数据库中为null值if( data.Rows[0]["A"] ==null) 这里就会报错。 正确的应该是if(data.Rows[0]["A"] ==DBNull.Value) 。
is no big difference in returning either a DataSet or a DataTable (both ways are simple like 1,2,3): using System; // You might need to add a reference to System.Data.dll to your // project. using System.Data; namespace MyDataLayer { public class MyDataObject { // Constructors,...
*/constinttuple_count = TESTS_TUPLES_PER_TILEGROUP;// Create a table and wrap it in logical tilesauto&txn_manager = concurrency::TransactionManager::GetInstance();autotxn = txn_manager.BeginTransaction();autotxn_id = txn->GetTransactionId();std::unique_ptr<storage::DataTable> data_table(...
publicstaticDatatableInsertIntoDB(...){// executing db command, getting values, creating & returning Datatable object...returnmyDataTable; } Run Code Online (Sandbox Code Playgroud) 然后当使用这个方法时,它被称为: DataTable myDataTable = InsertIntoDB(...);//thisDatatable objectishandle...