📄 form1.cs
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using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
namespace Example126_数据访问和更新
{
/// <summary>
/// Form1 的摘要说明。
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.DataGrid dataGrid1;
private System.Data.SqlClient.SqlDataAdapter sqlDataAdapter1;
private System.Data.SqlClient.SqlCommand sqlSelectCommand1;
private System.Data.SqlClient.SqlCommand sqlInsertCommand1;
private System.Data.SqlClient.SqlCommand sqlUpdateCommand1;
private System.Data.SqlClient.SqlCommand sqlDeleteCommand1;
private System.Data.SqlClient.SqlConnection sqlConnection1;
private Example126_数据访问和更新.dsAuthors dsAuthors1;
private System.Windows.Forms.Button btnUpdate;
private System.Windows.Forms.Button btnLoad;
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null;
public Form1()
{
//
// Windows 窗体设计器支持所必需的
//
InitializeComponent();
//
// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
//
}
/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows Form Designer generated code
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.dataGrid1 = new System.Windows.Forms.DataGrid();
this.sqlDataAdapter1 = new System.Data.SqlClient.SqlDataAdapter();
this.sqlSelectCommand1 = new System.Data.SqlClient.SqlCommand();
this.sqlInsertCommand1 = new System.Data.SqlClient.SqlCommand();
this.sqlUpdateCommand1 = new System.Data.SqlClient.SqlCommand();
this.sqlDeleteCommand1 = new System.Data.SqlClient.SqlCommand();
this.sqlConnection1 = new System.Data.SqlClient.SqlConnection();
this.dsAuthors1 = new Example126_数据访问和更新.dsAuthors();
this.btnUpdate = new System.Windows.Forms.Button();
this.btnLoad = new System.Windows.Forms.Button();
((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).BeginInit();
((System.ComponentModel.ISupportInitialize)(this.dsAuthors1)).BeginInit();
this.SuspendLayout();
//
// dataGrid1
//
this.dataGrid1.AlternatingBackColor = System.Drawing.Color.Silver;
this.dataGrid1.BackColor = System.Drawing.Color.White;
this.dataGrid1.CaptionBackColor = System.Drawing.Color.Maroon;
this.dataGrid1.CaptionFont = new System.Drawing.Font("Tahoma", 8F);
this.dataGrid1.CaptionForeColor = System.Drawing.Color.White;
this.dataGrid1.DataMember = "authors";
this.dataGrid1.DataSource = this.dsAuthors1;
this.dataGrid1.Font = new System.Drawing.Font("Tahoma", 8F);
this.dataGrid1.ForeColor = System.Drawing.Color.Black;
this.dataGrid1.GridLineColor = System.Drawing.Color.Silver;
this.dataGrid1.HeaderBackColor = System.Drawing.Color.Silver;
this.dataGrid1.HeaderFont = new System.Drawing.Font("Tahoma", 8F);
this.dataGrid1.HeaderForeColor = System.Drawing.Color.Black;
this.dataGrid1.LinkColor = System.Drawing.Color.Maroon;
this.dataGrid1.Location = new System.Drawing.Point(8, 24);
this.dataGrid1.Name = "dataGrid1";
this.dataGrid1.ParentRowsBackColor = System.Drawing.Color.Silver;
this.dataGrid1.ParentRowsForeColor = System.Drawing.Color.Black;
this.dataGrid1.SelectionBackColor = System.Drawing.Color.Maroon;
this.dataGrid1.SelectionForeColor = System.Drawing.Color.White;
this.dataGrid1.Size = new System.Drawing.Size(488, 240);
this.dataGrid1.TabIndex = 0;
//
// sqlDataAdapter1
//
this.sqlDataAdapter1.DeleteCommand = this.sqlDeleteCommand1;
this.sqlDataAdapter1.InsertCommand = this.sqlInsertCommand1;
this.sqlDataAdapter1.SelectCommand = this.sqlSelectCommand1;
this.sqlDataAdapter1.TableMappings.AddRange(new System.Data.Common.DataTableMapping[] {
new System.Data.Common.DataTableMapping("Table", "authors", new System.Data.Common.DataColumnMapping[] {
new System.Data.Common.DataColumnMapping("au_id", "au_id"),
new System.Data.Common.DataColumnMapping("au_lname", "au_lname"),
new System.Data.Common.DataColumnMapping("au_fname", "au_fname"),
new System.Data.Common.DataColumnMapping("city", "city"),
new System.Data.Common.DataColumnMapping("state", "state"),
new System.Data.Common.DataColumnMapping("contract", "contract")})});
this.sqlDataAdapter1.UpdateCommand = this.sqlUpdateCommand1;
//
// sqlSelectCommand1
//
this.sqlSelectCommand1.CommandText = "SELECT au_id, au_lname, au_fname, city, state, contract FROM authors";
this.sqlSelectCommand1.Connection = this.sqlConnection1;
//
// sqlInsertCommand1
//
this.sqlInsertCommand1.CommandText = "INSERT INTO authors(au_id, au_lname, au_fname, city, state, contract) VALUES (@au" +
"_id, @au_lname, @au_fname, @city, @state, @contract); SELECT au_id, au_lname, au" +
"_fname, city, state, contract FROM authors WHERE (au_id = @au_id)";
this.sqlInsertCommand1.Connection = this.sqlConnection1;
this.sqlInsertCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@au_id", System.Data.SqlDbType.VarChar, 11, "au_id"));
this.sqlInsertCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@au_lname", System.Data.SqlDbType.VarChar, 40, "au_lname"));
this.sqlInsertCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@au_fname", System.Data.SqlDbType.VarChar, 20, "au_fname"));
this.sqlInsertCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@city", System.Data.SqlDbType.VarChar, 20, "city"));
this.sqlInsertCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@state", System.Data.SqlDbType.VarChar, 2, "state"));
this.sqlInsertCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@contract", System.Data.SqlDbType.Bit, 1, "contract"));
//
// sqlUpdateCommand1
//
this.sqlUpdateCommand1.CommandText = @"UPDATE authors SET au_id = @au_id, au_lname = @au_lname, au_fname = @au_fname, city = @city, state = @state, contract = @contract WHERE (au_id = @Original_au_id) AND (au_fname = @Original_au_fname) AND (au_lname = @Original_au_lname) AND (city = @Original_city OR @Original_city IS NULL AND city IS NULL) AND (contract = @Original_contract) AND (state = @Original_state OR @Original_state IS NULL AND state IS NULL); SELECT au_id, au_lname, au_fname, city, state, contract FROM authors WHERE (au_id = @au_id)";
this.sqlUpdateCommand1.Connection = this.sqlConnection1;
this.sqlUpdateCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@au_id", System.Data.SqlDbType.VarChar, 11, "au_id"));
this.sqlUpdateCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@au_lname", System.Data.SqlDbType.VarChar, 40, "au_lname"));
this.sqlUpdateCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@au_fname", System.Data.SqlDbType.VarChar, 20, "au_fname"));
this.sqlUpdateCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@city", System.Data.SqlDbType.VarChar, 20, "city"));
this.sqlUpdateCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@state", System.Data.SqlDbType.VarChar, 2, "state"));
this.sqlUpdateCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@contract", System.Data.SqlDbType.Bit, 1, "contract"));
this.sqlUpdateCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Original_au_id", System.Data.SqlDbType.VarChar, 11, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "au_id", System.Data.DataRowVersion.Original, null));
this.sqlUpdateCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Original_au_fname", System.Data.SqlDbType.VarChar, 20, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "au_fname", System.Data.DataRowVersion.Original, null));
this.sqlUpdateCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Original_au_lname", System.Data.SqlDbType.VarChar, 40, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "au_lname", System.Data.DataRowVersion.Original, null));
this.sqlUpdateCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Original_city", System.Data.SqlDbType.VarChar, 20, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "city", System.Data.DataRowVersion.Original, null));
this.sqlUpdateCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Original_contract", System.Data.SqlDbType.Bit, 1, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "contract", System.Data.DataRowVersion.Original, null));
this.sqlUpdateCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Original_state", System.Data.SqlDbType.VarChar, 2, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "state", System.Data.DataRowVersion.Original, null));
//
// sqlDeleteCommand1
//
this.sqlDeleteCommand1.CommandText = @"DELETE FROM authors WHERE (au_id = @Original_au_id) AND (au_fname = @Original_au_fname) AND (au_lname = @Original_au_lname) AND (city = @Original_city OR @Original_city IS NULL AND city IS NULL) AND (contract = @Original_contract) AND (state = @Original_state OR @Original_state IS NULL AND state IS NULL)";
this.sqlDeleteCommand1.Connection = this.sqlConnection1;
this.sqlDeleteCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Original_au_id", System.Data.SqlDbType.VarChar, 11, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "au_id", System.Data.DataRowVersion.Original, null));
this.sqlDeleteCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Original_au_fname", System.Data.SqlDbType.VarChar, 20, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "au_fname", System.Data.DataRowVersion.Original, null));
this.sqlDeleteCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Original_au_lname", System.Data.SqlDbType.VarChar, 40, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "au_lname", System.Data.DataRowVersion.Original, null));
this.sqlDeleteCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Original_city", System.Data.SqlDbType.VarChar, 20, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "city", System.Data.DataRowVersion.Original, null));
this.sqlDeleteCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Original_contract", System.Data.SqlDbType.Bit, 1, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "contract", System.Data.DataRowVersion.Original, null));
this.sqlDeleteCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Original_state", System.Data.SqlDbType.VarChar, 2, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "state", System.Data.DataRowVersion.Original, null));
//
// sqlConnection1
//
this.sqlConnection1.ConnectionString = "data source=yinlimin;initial catalog=pubs;integrated security=SSPI;persist securi" +
"ty info=False;workstation id=YINLIMIN;packet size=4096";
//
// dsAuthors1
//
this.dsAuthors1.DataSetName = "dsAuthors";
this.dsAuthors1.Locale = new System.Globalization.CultureInfo("zh-CN");
this.dsAuthors1.Namespace = "http://www.tempuri.org/dsAuthors.xsd";
//
// btnUpdate
//
this.btnUpdate.Dock = System.Windows.Forms.DockStyle.Bottom;
this.btnUpdate.Location = new System.Drawing.Point(0, 285);
this.btnUpdate.Name = "btnUpdate";
this.btnUpdate.Size = new System.Drawing.Size(512, 24);
this.btnUpdate.TabIndex = 1;
this.btnUpdate.Text = "将更改保存到数据库";
this.btnUpdate.Click += new System.EventHandler(this.btnUpdate_Click);
//
// btnLoad
//
this.btnLoad.Dock = System.Windows.Forms.DockStyle.Top;
this.btnLoad.Name = "btnLoad";
this.btnLoad.Size = new System.Drawing.Size(512, 24);
this.btnLoad.TabIndex = 2;
this.btnLoad.Text = "加载数据";
this.btnLoad.Click += new System.EventHandler(this.btnLoad_Click);
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(512, 309);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.btnLoad,
this.btnUpdate,
this.dataGrid1});
this.Name = "Form1";
this.Text = "Form1";
((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).EndInit();
((System.ComponentModel.ISupportInitialize)(this.dsAuthors1)).EndInit();
this.ResumeLayout(false);
}
#endregion
/// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
}
private void btnLoad_Click(object sender, System.EventArgs e)
{
dsAuthors1.Clear();
sqlDataAdapter1.Fill(dsAuthors1);
}
private void btnUpdate_Click(object sender, System.EventArgs e)
{
sqlDataAdapter1.Update(dsAuthors1);
MessageBox.Show("数据库已更新!");
}
}
}
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