C#

Delete the selected row from the DataGridView database.# Region Delete selected rows in the DataGridView // Click Delete. Private void ButtonDelete_Click (object sender, EventArgs e) {If (maid = null | maid = null){Return;}Else{If (this.

Method 1You can customize a constructor in a subform. The parameter type is the main form. When you want to display the subform, use this constructor to instantiate the subform and pass this pointer in. The Code is as follows:Main form. csPublic

Data types can be divided into two types: non-structured atomic type and structure type. The composition of the structure type can make non-structured or structured. Data structure) A Data Structure is a collection of data elements that have one or

Adding a reference to webservice in a project is relatively fixed. After the webservice address is changed, you need to re-Add the webservice reference for the entire project, dynamic configuration allows you to change the referenced address of the

  Public bool IsPass (string userAccount, string password) {   String DomainName = "DC = SYQUEYRY, DC = COM, DC = CN "; String ADPath = "LDAP: // SYQUEYRY. COM. CN "; String ADDomain = "SYQUEYRY "; // Obtain the path in the current domain String _

  Obtain the coordinates relative to the screen on the form :] Method 1: Public class Win32 { [StructLayout (LayoutKind. Sequential)] Public struct POINT { Public int X; Public int Y;   Public POINT (int x, int y) { This. X = x; This. Y =

  Method 1: copy can be used directly, suitable for large volumes of data, tens of thousands of copies) Microsoft. Office. Interop. Excel. Application appexcel = new Microsoft. Office. Interop. Excel. Application (); SaveFileDialog savefiledialog =

Http://www.bkjia.com/kf/201111/112304.html tonightThe c # code is written to determine whether the two line segments overlap. The basic idea is the intersection of two line segments. For any line segment, the points at both ends are on both sides of

  1. Constants A constant is a special symbol that has an unchangeable value. When defining a constant, its value must be determined during compilation, after confirmation, the compiler saves the constant value to the metadata of the Assembly.

  C # The program is installed through.. net installation package can run, so sometimes it is inconvenient, you must install a. net installation package. net installation package, although the system will carry this, but there are still a

  Using System. Text. RegularExpressions; /// /// Calculate the number of times a substring appears. /// /// string /// substring /// Number of occurrences Public static int SubstringCount (string str, string substring) { If (str. Contains (

  Background: A textbox can be input to implement the search function. Function Improvement requirement: the textbox is transformed into an input drop-down box. The content of the drop-down box is a historical search record (the content of the last 2

After editing, deleting, or adding elements in FeatureClass, You can manually update its Extent using the following code: (IFeatureClassManage) pFeatureClass). UpdateExtent (); The method for obtaining layer Extent is:(IGeoDataset) pFeatureClass).

/// /// Obtain the month between two time periods/// /// Start month /// end month /// month string Public static string DateFiledMonths (string startTime, string endTime){Try{Int index = 0;String filed = string. Empty;DateTime c1 = Convert.

Cursor. Current = Cursors. WaitCursor;DataSet ds = bll. GetDcpfl (cm); // get dataDgvDcpfl. DataSource = ds. Tables [0]; // bind data Int widths = 0;For (int I = 0; I {DgvDcpfl. AutoResizeColumn (I, DataGridViewAutoSizeColumnMode. AllCells); //

Add the reference assembly Microsoft. Office. Interop. Excel Declare using Excel = Microsoft. Office. Interop. Excel; And the POST method: // Export the data of the DataGridView Excel FilePrivate void ExportExcel (string fileName, DataGridView myDGV)

We know that the data types of c # are divided into value type and reference type. Value types include the basic type (numeric type, bool type, etc.), structure, and enumeration. reference types include class, delegate, and array. When using methods

C # page settings during printingUsing Excel = Microsoft. Office. Interop. Excel;Excel. Application tmpExcel = new Excel. ApplicationClass ();Excel. workbook tmpbook = tmpExcel. workbooks. open (tmppath, Type. missing, Type. missing, Type. missing,

1. Restrict stringsAdd the @ symbol before the string to indicate that the Escape Character "no" is processed.If we write a file path, such as the text.txt file under "D:/Text File", without the @ symbol, the statement is as follows: StringfileName =

Using System;Using System. Configuration;Using System. Diagnostics;Using System. Threading;Using System. ServiceProcess;Using System. Collections;Using System. Collections. Generic;Using System. ComponentModel;Using System. Data;Using System.