using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Data.SqlClient;
namespace WindowsApplication24
{
/// <summary>
/// Form1 的摘要说明。
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.DataGrid dataGrid1;
private System.Windows.Forms.Button button1;
private System.Windows.Forms.Label label1;
private System.Windows.Forms.TextBox textBox1;
private System.Windows.Forms.TextBox textBox2;
private System.Windows.Forms.Label label2;
private System.Windows.Forms.TextBox textBox3;
private System.Windows.Forms.Label label3;
private System.Windows.Forms.TextBox textBox4;
private System.Windows.Forms.Label label4;
private System.Windows.Forms.Button button2;
private System.Windows.Forms.Button button3;
/// <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 窗体设计器生成的代码
/// <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.button1 = new System.Windows.Forms.Button();
this.label1 = new System.Windows.Forms.Label();
this.textBox1 = new System.Windows.Forms.TextBox();
this.textBox2 = new System.Windows.Forms.TextBox();
this.label2 = new System.Windows.Forms.Label();
this.textBox3 = new System.Windows.Forms.TextBox();
this.label3 = new System.Windows.Forms.Label();
this.textBox4 = new System.Windows.Forms.TextBox();
this.label4 = new System.Windows.Forms.Label();
this.button2 = new System.Windows.Forms.Button();
this.button3 = new System.Windows.Forms.Button();
((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).BeginInit();
this.SuspendLayout();
//
// dataGrid1
//
this.dataGrid1.DataMember = "";
this.dataGrid1.HeaderForeColor = System.Drawing.SystemColors.ControlText;
this.dataGrid1.Location = new System.Drawing.Point(8, 8);
this.dataGrid1.Name = "dataGrid1";
this.dataGrid1.Size = new System.Drawing.Size(488, 200);
this.dataGrid1.TabIndex = 0;
this.dataGrid1.CurrentCellChanged += new System.EventHandler(this.dataGrid1_CurrentCellChanged);
//
// button1
//
this.button1.Location = new System.Drawing.Point(8, 272);
this.button1.Name = "button1";
this.button1.TabIndex = 1;
this.button1.Text = "添加";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// label1
//
this.label1.Location = new System.Drawing.Point(8, 224);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(80, 23);
this.label1.TabIndex = 2;
this.label1.Text = "label1";
//
// textBox1
//
this.textBox1.Location = new System.Drawing.Point(80, 224);
this.textBox1.Name = "textBox1";
this.textBox1.Size = new System.Drawing.Size(72, 21);
this.textBox1.TabIndex = 3;
this.textBox1.Text = "";
//
// textBox2
//
this.textBox2.Location = new System.Drawing.Point(248, 224);
this.textBox2.Name = "textBox2";
this.textBox2.Size = new System.Drawing.Size(72, 21);
this.textBox2.TabIndex = 5;
this.textBox2.Text = "";
//
// label2
//
this.label2.Location = new System.Drawing.Point(168, 224);
this.label2.Name = "label2";
this.label2.Size = new System.Drawing.Size(80, 23);
this.label2.TabIndex = 4;
this.label2.Text = "label2";
//
// textBox3
//
this.textBox3.Location = new System.Drawing.Point(408, 224);
this.textBox3.Name = "textBox3";
this.textBox3.Size = new System.Drawing.Size(72, 21);
this.textBox3.TabIndex = 7;
this.textBox3.Text = "";
//
// label3
//
this.label3.Location = new System.Drawing.Point(328, 224);
this.label3.Name = "label3";
this.label3.Size = new System.Drawing.Size(80, 23);
this.label3.TabIndex = 6;
this.label3.Text = "label3";
//
// textBox4
//
this.textBox4.Location = new System.Drawing.Point(408, 272);
this.textBox4.Name = "textBox4";
this.textBox4.Size = new System.Drawing.Size(72, 21);
this.textBox4.TabIndex = 9;
this.textBox4.Text = "";
//
// label4
//
this.label4.Location = new System.Drawing.Point(328, 272);
this.label4.Name = "label4";
this.label4.Size = new System.Drawing.Size(80, 23);
this.label4.TabIndex = 8;
this.label4.Text = "label4";
//
// button2
//
this.button2.Location = new System.Drawing.Point(120, 272);
this.button2.Name = "button2";
this.button2.TabIndex = 10;
this.button2.Text = "button2";
//
// button3
//
this.button3.Location = new System.Drawing.Point(232, 272);
this.button3.Name = "button3";
this.button3.TabIndex = 11;
this.button3.Text = "button3";
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(512, 318);
this.Controls.Add(this.button3);
this.Controls.Add(this.button2);
this.Controls.Add(this.textBox4);
this.Controls.Add(this.label4);
this.Controls.Add(this.textBox3);
this.Controls.Add(this.label3);
this.Controls.Add(this.textBox2);
this.Controls.Add(this.label2);
this.Controls.Add(this.textBox1);
this.Controls.Add(this.label1);
this.Controls.Add(this.button1);
this.Controls.Add(this.dataGrid1);
this.Name = "Form1";
this.Text = "Form1";
this.Load += new System.EventHandler(this.Form1_Load);
((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).EndInit();
this.ResumeLayout(false);
}
#endregion
/// <summary>
/// 应用程序的主入口点。
/// </summary>
///
private DataSet ds=new DataSet();
private SqlConnection conn;
private SqlDataAdapter da;
private SqlParameter par=new SqlParameter();
private DataTable table=new DataTable();
private CurrencyManager man;
[STAThread]
static void Main()
{
Application.Run(new Form1());
}
private void button1_Click(object sender, System.EventArgs e)
{
try
{
DataRow row=this.ds.Tables["jobs"].NewRow();
row["job_id"]=this.textBox1.Text;
row["job_desc"]=this.textBox2.Text;
row["min_lvl"]=this.textBox3.Text;
row["max_lvl"]=this.textBox4.Text;
this.ds.Tables["jobs"].Rows.Add(row);
this.ds.HasChanges(DataRowState.Added);
this.da.Update(this.ds,"jobs");
MessageBox.Show("添加成功");
this.textBox1.Clear();
this.textBox2.Clear();
this.textBox3.Clear();
this.textBox4.Clear();
this.dataGrid1.Update();
this.textBox1.Focus();
}
catch(Exception ex)
{
MessageBox.Show(ex.Message.ToString());
}
}
private void Form1_Load(object sender, System.EventArgs e)
{
this.textBox1.Enabled=false;
conn=new SqlConnection("server=.;uid=sa;pwd=;database=pubs");
this.da=new SqlDataAdapter("select *from jobs",conn);
this.da.Fill(this.ds,"jobs");
this.dataGrid1.DataSource=this.ds;
this.dataGrid1.DataMember="jobs";
this.da.Fill(this.table);
this.dataGrid1.DataSource=this.table.DefaultView;
this.man=(CurrencyManager)BindingContext[this.table];
this.dataGrid1.SetDataBinding(this.ds,"jobs");
string incmd="insert into jobs values(@job_id,@job_desc,@min_lvl,@max_lvl)";
this.da.InsertCommand=new SqlCommand(incmd,conn);
this.par=this.da.InsertCommand.Parameters.Add("@job_id",SqlDbType.SmallInt,2);
this.par.SourceColumn="job_id";
this.par.SourceVersion=DataRowVersion.Current;
this.par=this.da.InsertCommand.Parameters.Add("@job_desc",SqlDbType.VarChar,50);
this.par.SourceColumn="job_desc";
this.par.SourceVersion=DataRowVersion.Current;
this.par=this.da.InsertCommand.Parameters.Add("@min_lvl",SqlDbType.TinyInt,1);
this.par.SourceColumn="min_lvl";
this.par.SourceVersion=DataRowVersion.Current;
this.par=this.da.InsertCommand.Parameters.Add("@max_lvl",SqlDbType.TinyInt,1);
this.par.SourceColumn="max_lvl";
this.par.SourceVersion=DataRowVersion.Current;
zq();
}
private void zq()
{
try
{
this.textBox1.DataBindings.Add("Text",this.table,"job_id");
this.textBox2.DataBindings.Add("Text",this.table,"job_desc");
this.textBox3.DataBindings.Add("Text",this.table,"min_lvl");
this.textBox4.DataBindings.Add("Text",this.table,"max_lvl");
}
catch(Exception ex)
{
MessageBox.Show(ex.Message.ToString());
}
}
private void dataGrid1_CurrentCellChanged(object sender, System.EventArgs e)
{
if(this.table.Rows.Count>0)
{
int count=this.dataGrid1.CurrentCell.RowNumber;
if(count>0&&count<=this.man.Count)
{
this.man.Position=count;
}
}
}
}
}
问题是我在点添加按鈕是怎么让下面的文本框数据自动清空~~!@@!@
