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第六周学习笔记,vc各类控件的输入输出
阅读量:5034 次
发布时间:2019-06-12

本文共 14656 字,大约阅读时间需要 48 分钟。

6w学习笔记

 vc控件的输入输出

单选按钮

当单击 RadioButton 控件时,其 Checked 属性设置为 true,并且调用 Click 事件处理程序。当 Checked 属性的值更改时,将引发 CheckedChanged 事件。如果 AutoCheck 属性设置为 true(默认值),则当选择单选按钮时,将自动清除该组中的所有其他单选按钮

 

 

 

 

输入

this.rdb_in.Checked = (bool)sqlDataReader["inorout"];

this.rdb_out.Checked = !(bool)sqlDataReader["inorout"];

输出

sqlConnection.Open();

if(this.rdb_Male.Checked==true)

string str = "update tb_book set inorout=1 where No=09187756";

else

string str = "update tb_book set inorout=0 where No=09187756";

日历控件

 

 

 

 

输入         this.dtp_BirthDate.Value(DateTime)sqlDataReader["publishDate"];

输出     

 sqlCommand1.Parameters.AddWithValue("@date", this.data.tostring);          

 

文本框

 

 

 

输入this.txb_No.Text = sqlDataReader["No"].ToString();    

输出sqlCommand1.Parameters.AddWithValue("@No", client.No);

 

网格视图控件 DataGridView 

 

 

下拉列表控件ComboBox

 

输入 this.cmb_stock.SelectedValue = (int)sqlDataReader["stockNo"];

this.cmb_stock.DataSource = stockTable;

this.cmb_stock.DisplayMember = "Name";
this.cmb_stock.ValueMember = "No";

输出sqlCommand1.Parameters.AddWithValue("@stockNo",this.cmb_stock.SelectedValue.toString());

 

 

示例

建库语句

 

USE master;IF DB_ID('EduBaseDemo') IS NOT NULLBEGINALTER DATABASE EduBaseDemoSET SINGLE_USERWITH ROLLBACK IMMEDIATE;DROP DATABASE EduBaseDemo;ENDCREATE DATABASE EduBaseDemoON(NAME='Datafile',FILENAME='C:\DataFile.mdf')LOG ON(NAME='Logfile',FILENAME='C:\Logfile.ldf');GOUSE EduBaseDemo;--创建表;----班级表CREATE TABLE tb_stock(NoINTNOT NULLPRIMARY KEY,NameVARCHAR(20)NOT NULL)INSERT tb_stock(No,Name)VALUES(1,'A馆'),(2,'B馆'),(3,'C馆'),(4,'D馆');----学生表;CREATE TABLE tb_book(NoCHAR(10)NOT NULLPRIMARY KEY,NameVARCHAR(20)NOT NULL,inoroutBITNOT NULL,publishDateDATENOT NULL,stockNoINTNOT NULL,SpecialityVARCHAR(100)NULL);INSERT tb_book(No,Name,inorout,publishDate,stockNo,Speciality)VALUES('09187756','内科学',1,'1991-10-15',2,'收藏'); select * from tb_bookselect  * from tb_stock

  

 

 

 

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;                                                                                 //添加调用:using System.Data.SqlClient;                                                      //包含访问SQL Server所需的各类对象;namespace lizi6w{        public partial class frm_booktInfo : Form    {        ///         /// 公有方法:构造函数;        ///         public frm_bookInfo()        {            InitializeComponent();            this.StartPosition = FormStartPosition.CenterScreen;                          //本窗体启动位置设为屏幕中央;         }        ///         /// 私有方法:点击载入按钮;        ///         ///         ///         private void btn_Load_Click(object sender, EventArgs e)        {            SqlConnection sqlConnection = new SqlConnection();                                                                 sqlConnection.ConnectionString =                "Server=(local);Database=EduBaseDemo;Integrated Security=sspi";                        SqlCommand sqlCommand = new SqlCommand();                                                                           SqlCommand sqlCommand2 = new SqlCommand();                                                                          sqlCommand.Connection = sqlConnection;                                                                      sqlCommand2.Connection = sqlConnection;                                                                     sqlCommand.CommandText = "SELECT * FROM tb_stock;";                                                         sqlCommand2.CommandText = "SELECT * FROM tb_book WHERE No=@No;";                                     sqlCommand2.Parameters.AddWithValue("@No", "09187756");                                                   SqlDataAdapter sqlDataAdapter = new SqlDataAdapter();                                           sqlDataAdapter.SelectCommand = sqlCommand;                                                                  DataTable classTable = new DataTable();                                                                     sqlConnection.Open();                                                                                       sqlDataAdapter.Fill(classTable);                                                                            this.cmb_stock.DataSource = classTable;                                                                     this.cmb_stock.DisplayMember = "Name";                                                                      this.cmb_stock.ValueMember = "No";                                                                          SqlDataReader sqlDataReader = sqlCommand2.ExecuteReader();                                                  if (sqlDataReader.Read())                                                                                   {                this.txb_No.Text = sqlDataReader["No"].ToString();                                                                   this.txb_Name.Text = sqlDataReader["Name"].ToString();                this.rdb_inorout.Checked = (bool)sqlDataReader["inorout"];                this.rdb_inorout.Checked = !(bool)sqlDataReader["inorout"];                this.dtp_publishDate.Value = (DateTime)sqlDataReader["publishDate"];                this.cmb_stock.SelectedValue = (int)sqlDataReader["stockNo"];                this.txb_Speciality.Text = sqlDataReader["Speciality"].ToString();            }            sqlDataReader.Close();                                                    //关闭数据阅读器(同时关闭连接);        }    }                                                                                                    }

  

 

 

 例子2DataGridView

namespace 药品信息管理系统{    public partial class frm_ClientTable : Form    {        public frm_ClientTable()        {            InitializeComponent();            this.StartPosition = FormStartPosition.CenterScreen;          }        private void frm_ClientTable_Load(object sender, EventArgs e)        {        }        private void btn_Load_Click(object sender, EventArgs e)        {            using (SqlConnection sqlConnection = new SqlConnection(DBHelper.connString))            {                SqlCommand sqlCommand = new SqlCommand();                                                                      //声明并实例化SQL命令;                sqlCommand.Connection = sqlConnection;                                                                       //将SQL命令的连接属性指向SQL连接;                sqlCommand.CommandText = "SELECT * FROM tb_Client;";                                                         //指定SQL命令的命令文本;该命令查询所有学生;                SqlDataAdapter sqlDataAdapter = new SqlDataAdapter();                                           //声明并实例化SQL数据适配器;                sqlDataAdapter.SelectCommand = sqlCommand;                                                      //将SQL数据适配器的查询命令属性指向SQL命令;                DataTable ClientTable = new DataTable();                                                                     //声明并实例化数据表,用于保存所有学生,以用作数据网格视图的数据源;                sqlConnection.Open();                                                                           //打开SQL连接;                sqlDataAdapter.Fill(ClientTable);                                                                           //SQL数据适配器读取数据,并填充学生数据表;                sqlConnection.Close();                                                                          //关闭SQL连接;                this.dgv_Client.Columns.Clear();                                                                 //数据网格视图的列集合清空;                this.dgv_Client.DataSource = ClientTable;                                                       //将数据网格视图的数据源设为学生数据表;                this.dgv_Client.Columns["CNo"].HeaderText = "客户编号";                                               //将数据网格视图的指定列的表头文本设为中文;                this.dgv_Client.Columns["CName"].HeaderText = "客户名称";                this.dgv_Client.Columns["CAddress"].HeaderText = "地址";                this.dgv_Client.Columns["CTel"].HeaderText = "联系电话";                this.dgv_Client.Columns["CName"].AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill;                this.dgv_Client.Columns[this.dgv_Client.Columns.Count - 1].AutoSizeMode =                         //数据网格视图的最后一列的自动调整列宽模式设为填充(至数据网格视图右侧边缘);                    DataGridViewAutoSizeColumnMode.Fill;            }        }        private void btn_Update_Click(object sender, EventArgs e)        {            using (SqlConnection sqlConnection = new SqlConnection(DBHelper.connString))            {                SqlCommand sqlCommand = new SqlCommand();                                                       //声明并实例化SQL命令;                sqlCommand.Connection = sqlConnection;                                                          //将SQL命令的连接属性指向SQL连接;                sqlCommand.CommandText =                                                                        //指定SQL命令的命令文本;                    "UPDATE tb_Client"                    + " SET CName=@CName,CAddress=@CAddress,CTel=@CTel"                    + " WHERE CNo=@CNo;";                sqlCommand.Parameters.Add("@CName", SqlDbType.VarChar, 0, "CName");                                  //向SQL命令的参数集合添加参数的名称、SQL Server数据类型、长度(仅用于定长类型)、所绑定的数据表中的列名;                sqlCommand.Parameters.Add("@CAddress", SqlDbType.VarChar, 0, "CAddress");                sqlCommand.Parameters.Add("@CTel", SqlDbType.VarChar, 0, "CTel");                sqlCommand.Parameters.Add("@CNo", SqlDbType.Char, 10, "CNo");                SqlDataAdapter sqlDataAdapter = new SqlDataAdapter();                                           //声明并实例化SQL数据适配器,同时借助构造函数,将其SelectCommand属性设为先前创建的SQL命令;                sqlDataAdapter.UpdateCommand = sqlCommand;                                                      //将SQL数据适配器的更新命令属性指向SQL命令;                DataTable ClientTable = (DataTable)this.dgv_Client.DataSource;                //声明数据表,并指向数据网格视图的数据源;数据源默认类型为object,还需强制转换类型;                sqlConnection.Open();                //打开SQL连接;                int rowAffected = sqlDataAdapter.Update(ClientTable);                sqlConnection.Close();                if (rowAffected > 0)                {                    MessageBox.Show("更新" + rowAffected.ToString() + "行。");                }                else                {                    MessageBox.Show("not ok");                }                                //SQL数据适配器根据学生数据表提交更新,并返回受影响行数;            }        }        private void btn_Add_Click(object sender, EventArgs e)        {                       //未完成            using (SqlConnection sqlConnection = new SqlConnection(DBHelper.connString))            {                SqlCommand sqlCommand = new SqlCommand();                                                       //声明并实例化SQL命令;                sqlCommand.Connection = sqlConnection;                                                          //将SQL命令的连接属性指向SQL连接;                sqlCommand.CommandText =                                                                        //指定SQL命令的命令文本;                   "insert tb_Client (CNo,CName,CTel,CAddress)values"                    + "(@CNo,@CName,@CTel,@CAddress)";                sqlCommand.Parameters.Add("@CName", SqlDbType.VarChar, 0, "CName");                                  //向SQL命令的参数集合添加参数的名称、SQL Server数据类型、长度(仅用于定长类型)、所绑定的数据表中的列名;                sqlCommand.Parameters.Add("@CAddress", SqlDbType.VarChar, 0, "CAddress");                sqlCommand.Parameters.Add("@CTel", SqlDbType.VarChar, 0, "CTel");                sqlCommand.Parameters.Add("@CNo", SqlDbType.Char, 10, "CNo");                SqlDataAdapter sqlDataAdapter = new SqlDataAdapter();                                           //声明并实例化SQL数据适配器,同时借助构造函数,将其SelectCommand属性设为先前创建的SQL命令;                sqlDataAdapter.UpdateCommand = sqlCommand;                                                      //将SQL数据适配器的更新命令属性指向SQL命令;                DataTable ClientTable = (DataTable)this.dgv_Client.DataSource;                //声明数据表,并指向数据网格视图的数据源;数据源默认类型为object,还需强制转换类型;                sqlConnection.Open();                //打开SQL连接;                int i = sqlCommand.ExecuteNonQuery();                if (i == 1)                {                    MessageBox.Show("OK");                }                else                    MessageBox.Show("not OK");                //int rowAffected = sqlDataAdapter.Update(ClientTable);                sqlConnection.Close();                MessageBox.Show("添加" + i.ToString() + "行。");                //SQL数据适配器根据学生数据表提交更新,并返回受影响行数;            }        }        private void btn_Delete_Click(object sender, EventArgs e)        {                                                                    //未完成            using (SqlConnection sqlConnection = new SqlConnection(DBHelper.connString))            {                SqlCommand sqlCommand = new SqlCommand();                                                       //声明并实例化SQL命令;                sqlCommand.Connection = sqlConnection;                                                          //将SQL命令的连接属性指向SQL连接;                sqlCommand.CommandText =                                                                        //指定SQL命令的命令文本;                    "delete from tb_Client"                    + " WHERE CName='"+this.dgv_Client .CurrentRow .Cells [1].ToString ()+"'";;                                //sqlCommand.Parameters.Add("@CName", SqlDbType.VarChar, 0, "CName");                                  //向SQL命令的参数集合添加参数的名称、SQL Server数据类型、长度(仅用于定长类型)、所绑定的数据表中的列名;                //sqlCommand.Parameters.Add("@CAddress", SqlDbType.VarChar, 0, "CAddress");                //sqlCommand.Parameters.Add("@CTel", SqlDbType.VarChar, 0, "CTel");                //sqlCommand.Parameters.Add("@CNo", SqlDbType.Char, 10, "CNo");                SqlDataAdapter sqlDataAdapter = new SqlDataAdapter();                                           //声明并实例化SQL数据适配器,同时借助构造函数,将其SelectCommand属性设为先前创建的SQL命令;                sqlDataAdapter.UpdateCommand = sqlCommand;                                                      //将SQL数据适配器的更新命令属性指向SQL命令;                DataTable ClientTable = (DataTable)this.dgv_Client.DataSource;                //声明数据表,并指向数据网格视图的数据源;数据源默认类型为object,还需强制转换类型;                sqlConnection.Open();                //打开SQL连接;                int i = sqlCommand.ExecuteNonQuery();                if (i >0)                {                    MessageBox.Show("OK");                }                else                    MessageBox.Show("not OK");                //int rowAffected = sqlDataAdapter.Update(ClientTable);                sqlConnection.Close();                MessageBox.Show("删除" + i.ToString() + "行。");                //SQL数据适配器根据学生数据表提交更新,并返回受影响行数;            }        }    }}

 

转载于:https://www.cnblogs.com/xxnzmy/p/9790178.html

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