kaggle dataset

It's common to know if a dataset is empty, but I'm starting to get a little vague on the concept of DS empty, and I looked at it online, and the results are as follows: The dataset is empty and there are no tables in the dataset.The dataset is empty, or a reference to a dataset type is null, meaning that the reference

Take the table name "MyTable" and the field FirstName varchar (30) and FamilyName varchar (30) as an example. Non-strong (UnTyped) Dataset does not need to define the attributes of each field of the corresponding table in advance, you can directly obtain the values from the queried result set (non-strong (UnTyped) Dataset), for example:String lFirstName =LDs. Table ["MyTable"]. Rows [0] ["FirstName"]. ToStr

Using a dataset to delete records is very similar to updating records using Datasets, and the steps for a dataset to delete records are as follows.Q Create a Connection object.Q Create a DataAdapter object.Q Initialize the adapter.Q Use the Fill method of the data adapter to execute the SELECT command and populate the dataset.Q Executes the SqlCommandBuilder method to generate the Updatacommand method.Q Cre

Import EXCEL Data to dataset, and import data to dataset I. Prerequisites 1. micorosoft office2007 2. VS2010 and Oracle 11 Ii. Interface 3. Internal code (1) Obtain database connections and define global variables Private static string connString = System. Configuration. ConfigurationSettings. deleettings ["connStr"];DataSet dTable; (2) Select an Excel file to i

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Dataset DS = new dataset (); Sqldataadapter da = new sqldataadapter (); Int Gg = da. Fill (DS, "TB "); DS = ds_up (DS, GG ); Public dataset ds_up (system. Data. dataset DSS, int GC){Dataset dd = DSS;For (INT I = 0; I {If (DD. Tables ["TB"]. Rows [I] ["membership level"].

Label: recently, there is a need to write some C # programs, useful to dataset datasets and SQLite database, because I have never been good at remembering the syntax of various programming languages, so after reviewing a bunch of data, left the following content memo: First, sqlite operation, direct code, very simple://Create a database file stringDatasource=application.startuppath +"\\test.db"; System.Data.SQLite.SQLiteConnection.CreateFile

Convert DataSet to json, and DataSet to json/// /// Convert dataset data to json format/// /// /// Public static string GetJsonByDataset (DataSet ds){If (ds = null | ds. Tables. Count {// If the queried data is null, mark OK: falseReturn "{\" OK \ ": false }";}StringBuilder sb = new StringBuilder ();Sb. Append ("{\" OK

In actual scenarios, you may need to query the table sheets in the database at a time, Fill the dataset with the fill method of the sqldataadapter class, and specify the name of the able table filled in the dataset, For example, set it to the same as the database. You can use the tablemappings attribute of the sqldataadapter class. Fill in the table name in dataset