Two days ago, we used oledb to connect to excel to extract the required data from multiple sheets in an Excel team,ProgramThe results are very simple and will soon come out. It takes a long time for the results to be selected manually. Now, the results are displayed in almost one click. The user is very satisfied. Because it is used by many people, the results are displayed on a page at the beginning. Later
Python script to export data in excel format (recommended), python data export
During my internship, a senior engineer from the server asked me to help sort out the server's log data. Finally, I used Python to extract the data and export it in Excel format.The following is t
C # Read and write Excel (ii) .- ,- - -: -: the| Category: Default Categories | Tags: | report |font size large and small subscription with "sweep" to share the article to the Circle of friends. Use easy letter "sweep" to share the article to the Circle of friends. Download Lofter ClientPrivate voidButton1_Click (Objectsender, System.EventArgs e) { if(Openfiledialog1.showdialog () = =DialogResult.OK) {Ol
//hssfsheet sheet = workbook.getsheet ("Sheet0"); //workbook.getsheetat (0); Get first sheet by defaultHssfsheet sheet = workbook.getsheetat (0); intFirstrownum = 0; //get the last line number of the current sheet intLastrownum =Sheet.getlastrownum (); for(inti = Firstrownum; I ) {Hssfrow row=Sheet.getrow (i); //get the last cell column number of the current line intLastcellnum =Row.getlastcellnum (); for(intj = 0; J ) {Hssfcell cell=Row.getcell (j); String va
. Access the COM object exposed by Excel
The following is a complete example of accessing ExcelCode. First, fill the cells with the generated data, and then use the data of these cells to generate a chart ):
Try {Excel: _ applicationptr pexcelapp; hresult hR = pexcelapp. createinstance (L "Excel. application "); atlassert (succeeded (HR); pexcelapp-> visible =
Use poi to read and write Excel
For a programmer, file operations are common, especially for Excel files.
Here I will introduce a POI tool used in the project to Operate Excel. There are many concepts about POI on the Internet. For more information, you can use Baidu. Here I will just give a brief introduction. POI is
JAVA-based Excel read/write-poi, javaexcel-poi
The previous article introduced xls. jar to generate an Excel file. This article introduces how to use poi to read and write Excel files. The content is very simple and the code annotations are clear.
1. generate an
BULK INSERT record. For ease of use, a record class was first written, containing a list1 /// 2 ///adding records using the Record collection3 /// 4 Virtual Public BOOLExporttoexcelwhereT:record5 {6 Try7 {8 This. Worksheet. Cells[startrow, StartColumn]. Select ();9 foreach(varRecordinch_records)Ten { One This. Worksheet. Cells[startrow, StartColumn]. Select ();
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Non-relational database: MongoDB, Redis
NoSQL all data is key:value form of MONGODB data is present on disk Redis data are present in memory connected MySQL databaseThe data is: The output is: However, if the Fetchall is run first, then run Fetchone or Fetchmany, it will not get, will return none, this is similar to the file operation, the pointer has been moved to the tail. You can also execute an INSERT statement: But it is important to note that after executing an SQL s
Use Python to write the CUDA program, and use python to write the cuda Program
There are two ways to write a CUDA program using Python:
* Numba* PyCUDA
Numbapro is no longer recommended. It is split and integrated into accelerate
Many people ask this question in the forum. Because the code is long and the answers provided by many people are not complete, some people who are new to the Forum may take a lot of detours, here we will summarize the generation process and principles, hoping to give you a reference and help.
1. first, generate an Excel file. You need to understand the format of this file, such as the file header information, file body (body part), and file bottom inf
To read and write Excel table files directly through ODBC, first, make sure that you have a driver for Excel table files installed in ODBC, MICROSOFT Excel DRIVER (*. XLS) ". You can then proceed according to the following steps:
1. In the StdAfx.h document, add:
#include #include
2. Create an
Python read Excel Method Instance analysis, python instance analysis
This example describes how to read an Excel file from Python. Share it with you for your reference. The details are as follows:
This day, data is imported from an Excel
"]; dataGridView1.AutoGenerateColumns=true; datagridview1.columns[0]. readonly=false; NBSP;NBSP;NBSP;DATAGRIDVIEW1.COLUMNS[1]. readonly=true; NBSP;NBSP;DATAGRIDVIEW1.COLUMNS[2]. readonly=true;} catch (Exceptionex) {messagebox.show (" You encounter an error while opening an Excel file, check whether the valid Excel file/n "+ex. Message);} } * Write data to
filepath, string constr){String constring = "provider = microsoft. ace. oledb.12.0; data source =" + filepath + "; extended properties =" excel 12.0; hdr = yes "";Oledbconnection con = new oledbconnection (constring );Oledbdataadapter oda = new oledbdataadapter (constr, con );Datatable dt = new datatable ();Con. open ();Oda. fill (dt );Con. close ();Return dt;}4. Write data in
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