dataset for data mining in excel

") + "; User id=admin; password=; ";OleDbConnection ODBC = new OleDbConnection (strconn);return ODBC;}protected void Button1_Click (object sender, EventArgs e){Defining Excel ListsString StyleSheet = "Sheet1";Call the custom LoadData method to read the data in the Excel file to the ASPNET pageLoadData (StyleSheet);To define the SQL statement for a queryString sql

uploaded file content on the server Dataset DS = Excelsqlconnection (savepath, filename ); // Call a custom Method Datarow [] Dr = DS. Tables [ 0 ]. Select (); // Define a datarow Array Int Rowsnum = DS. Tables [ 0 ]. Rows. count; If (Rowsnum = 0 ){Response. Write ( " " ); // Prompt the user when the Excel table is empty } Else

I've been very busy lately and haven't written a blog for a long time. Today, let's explain how to import Excel data into Excel in C #, and at the end of the article, how to import data using SQL Server and MySQL tools.The import process is broadly divided into two steps: 1. Import the

the code to webform1.aspx. CSPage_loadEvent:// Create connection string variable. Modify the "Data Source"// parameter as appropriate for your environment.String sConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;" +"Data Source=" + Server.MapPath("../ExcelData.xls") + ";" +"Extended Properties=Excel 8.0;";// Create connection object by using the preceding co

properties = 'excel 12.0 XML; HDR = Yes '";// SQL statement// String strexcel = string. Format ("select * from [{0} $]", strsheetname); this is a methodString strexcel = "select * from [" + strsheetname + "]";// Define the stored data tableDataset DS = new dataset ();// Connect to the data sourceUsing (oledbconnection

adjustments. We need to transform the data and convert this series of numbers into DataFrame so that it can be more easily merged into existing data. The T function allows us to change the data arranged by row to the data arranged by column. df_sum=pd.DataFrame(data=sum_row

Page_Load (object sender, EventArgs e){}/// /// Upload a file/// /// /// Protected void button#click (object sender, EventArgs e){String fileName = fileId. FileName;String savePath = Server. MapPath ("~ /File /");FileOperatpr (fileName, savePath );FileId. SaveAs (savePath + fileName );DataOperator (fileName, savePath );}/// /// Data Operations/// /// /// Private void DataOperator (string fileName, string savePath){String myString = "Provider = Micros

C # operation Excel data additions and deletions to check. First create the Exceldb.xlsx file and add two sheets. Work Table 1: UserInfo tables, fields: UserId, UserName, age, address, createtime. Work Table 2: Order table, Fields: OrderNo, ProductName, Quantity, Money, saledate. 1, create ExcelHelper.cs class, Excel File Processing class Copy Code c

("UserScore. mdb") + "; User Id = admin; Password = ;";OleDbConnection odbc = new OleDbConnection (strconn );Return odbc;}Protected void button#click (object sender, EventArgs e){// Define the Excel listString StyleSheet = "Sheet1 ";// Call the custom LoadData method to read data from the Excel file to the ASPNET pageLoadData (StyleSheet );// Define the query SQ

; IEnumerable // DateTime. fromOADate (double. parse (value); if it is determined to be a date, you can directly use this method to convert it to a date object, but you cannot determine whether the CELL data is floating or date when DataType = NULL. (date is automatically converted to floating point return value ;}}}} How to import an Excel file to data by readi

OleDbDataAdapter (SQL,CONNSTR);DataSet ds=new DataSet ();Da. Fill (DS);Datagrid1.datasource=ds;Datagrid1.databind ();Conn.close ();However, the result of running the above code is not expected, it will appear as shown in table 2. You can find that the two data items in the first field that are "1042" become empty.Table 2 The

(Rowsnum = = 0){Response.Write (" "); Prompt the user when the Excel table is empty}Else{for (int i = 0; i {In front of you need to create a "upfiles" folder, the others do not have to control, you just need to get the value of Excel in the following way, and then put these values in your way to insert into the databasestring title = dr[i]["caption"]. ToString ();String linkurl = dr[i]["link Address"]. ToS

. Step 2: Create a New winfrom form application named exportorimport. Put a dview control and a button control on the form. Step 2: Create a new Lib folder in the current project, copy the following class libraries to the folder, right-click "Reference" → "add reference", and find the DLL files of Lib, complete adding. Step 3: Introduce the following namespace in the project: Using npoi. hssf. usermodel; Using npoi. hpsf; Using npoi; Using system. IO; Step 4: read

} Else { for(inti =0; I ) { //In front of you need to create a "upfiles" folder, the others do not have to control, you just need to get the value of Excel in the following way, and then put these values in your way to insert into the database stringtitle = dr[i]["title"]. ToString (); stringLinkurl = dr[i]["Link Address"]. ToString (); st

When querying Excel data, if the values in a column contain numbers and texts, some text values may not be read from the data obtained using the query statement. for this reason, I want to find a large segment on the Internet. In fact, it is very easy to solve this problem, as long as the connection string instructs all columns to be processed by text, so that