WebApr 15, 2010 · public static Hashtable ConvertDataTableToHashTable (DataTable dt) { Hashtable ht = new Hashtable (); foreach (DataRow dr in dt.Rows) { ht.Add (dr [0], dr … WebFeb 7, 2013 · Simplest way to convert a Hashtable into a DataTable with all the Hashtable rows converted into DataTable columns. This code creates one row in DataTable, you can modify it according to your requirement. This Function returns a DataTable object and takes a Hashtable object as parameter. Simple implementation example: DataTable , …
What data structure should I use? HashTable, Array...?
WebOct 14, 2008 · 灵活的运用数据绑定操作绑定到简单属性:绑定到集合:绑定到表达式:绑定到方法返回值:绑定到Hashtable:绑定到ArrayList:若数组里里放的是对象则可能要进行必要的转换后再绑定如:绑定到DataView,DataTable,DataSet:或要格式化则:绑定到DataReader:当然为了方便一般使用最多的就是DataBinder类的Eval方法了.只是这样 ... WebMay 5, 2024 · DictionaryはList・HashSetとは少し方法が異なります。. DataTableからAsEnumerableメソッドを呼び出してToDictionaryメソッドでDictionaryに変換し、DataTableの項目名を指定します。. また、 … martin body file
database - C# DataSetの使い道を教えてください。 - スタック・ …
DataTable dt = new Dictionary { {"v1", 1}, {"v2", 2}}.ToDataTable (); DataTable dt2 = new Hashtable () { {"v1", 1}, {"v2", 2}}.ToDataTable (); Note that I did not change all that much. C# already has hashmap data structure, and it is called dictionary. Also when looping over collections, it is a lot better to use foreach loop, as ... WebApr 16, 2010 · You can use the following function to convert DataTable to HashTable, public static Hashtable convertDataTableToHashTable (DataTable dtIn,string keyField,string valueField) { Hashtable htOut = new Hashtable (); foreach (DataRow drIn in dtIn.Rows) { htOut.Add (drIn [keyField].ToString (),drIn [valueField].ToString ()); } return … Web・型付きDataSet, 型なしDataSet（join Select、DataTableのグループ化など） ・型付きDataTable, 型なしDataTable（DBのテーブルに対応） ・TableAdapter（単純なDBの … martin body c