关于TextBox问题（十万火急）
代码如下：
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Data.SqlClient;
namespace member
{
/// <summary>
/// login 的摘要说明。
/// </summary>
public class login : System.Windows.Forms.Form
{
private System.Windows.Forms.TextBox textBox1;
private System.Windows.Forms.TextBox textBox2;
private System.Windows.Forms.TextBox textBox3;
private System.Windows.Forms.Button button1;
private System.Windows.Forms.Button button2;
private System.Windows.Forms.Label label1;
private System.Windows.Forms.Label label2;
private System.Windows.Forms.Label label3;
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null;
public login()
{
//
// 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()
{
System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(login));
this.button1 = new System.Windows.Forms.Button();
this.button2 = new System.Windows.Forms.Button();
this.textBox1 = new System.Windows.Forms.TextBox();
this.textBox2 = new System.Windows.Forms.TextBox();
this.textBox3 = new System.Windows.Forms.TextBox();
this.label1 = new System.Windows.Forms.Label();
this.label2 = new System.Windows.Forms.Label();
this.label3 = new System.Windows.Forms.Label();
this.SuspendLayout();
//
// button1
//
this.button1.BackColor = System.Drawing.SystemColors.ActiveCaptionText;
this.button1.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
this.button1.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
this.button1.Location = new System.Drawing.Point(280, 184);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(56, 24);
this.button1.TabIndex = 3;
this.button1.Text = "确 定";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// button2
//
this.button2.BackColor = System.Drawing.SystemColors.ActiveCaptionText;
this.button2.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
this.button2.Location = new System.Drawing.Point(368, 184);
this.button2.Name = "button2";
this.button2.Size = new System.Drawing.Size(56, 24);
this.button2.TabIndex = 4;
this.button2.Text = "取 消";
this.button2.Click += new System.EventHandler(this.button2_Click);
//
// textBox1
//
this.textBox1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
this.textBox1.Location = new System.Drawing.Point(272, 104);
this.textBox1.Name = "textBox1";
this.textBox1.Size = new System.Drawing.Size(160, 21);
this.textBox1.TabIndex = 0;
this.textBox1.Text = "";
//
// textBox2
//
this.textBox2.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
this.textBox2.Enabled = false;
this.textBox2.Location = new System.Drawing.Point(272, 128);
this.textBox2.Name = "textBox2";
this.textBox2.Size = new System.Drawing.Size(160, 21);
this.textBox2.TabIndex = 1;
this.textBox2.Text = "";
//
// textBox3
//
this.textBox3.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
this.textBox3.Location = new System.Drawing.Point(272, 152);
this.textBox3.Name = "textBox3";
this.textBox3.PasswordChar = '*';
this.textBox3.Size = new System.Drawing.Size(160, 21);
this.textBox3.TabIndex = 2;
this.textBox3.Text = "";
//
// label1
//
this.label1.BackColor = System.Drawing.SystemColors.ActiveCaptionText;
this.label1.Location = new System.Drawing.Point(208, 109);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(72, 16);
this.label1.TabIndex = 5;
this.label1.Text = "用户代码：";
//
// label2
//
this.label2.BackColor = System.Drawing.SystemColors.ActiveCaptionText;
this.label2.Location = new System.Drawing.Point(208, 133);
this.label2.Name = "label2";
this.label2.Size = new System.Drawing.Size(72, 16);
this.label2.TabIndex = 6;
this.label2.Text = "用户姓名：";
//
// label3
//
this.label3.BackColor = System.Drawing.SystemColors.ActiveCaptionText;
this.label3.Location = new System.Drawing.Point(208, 157);
this.label3.Name = "label3";
this.label3.Size = new System.Drawing.Size(72, 16);
this.label3.TabIndex = 7;
this.label3.Text = "用户密码：";
//
// login
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.BackgroundImage = ((System.Drawing.Bitmap)(resources.GetObject("$this.BackgroundImage")));
this.ClientSize = new System.Drawing.Size(448, 229);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.textBox3,
this.textBox2,
this.textBox1,
this.button2,
this.button1,
this.label1,
this.label2,
this.label3});
this.MaximizeBox = false;
this.MinimizeBox = false;
this.Name = "login";
this.Text = "会员登录";
this.ResumeLayout(false);
}
#endregion
private void button1_Click(object sender, System.EventArgs e)
{
if (this.CheckUser(this.textBox1.Text.Trim(),this.textBox2.Text.Trim(),this.textBox3.Text.Trim())==true)
{
winmain winmain = new winmain();
classa.Code =textBox1.Text;
classa.User =textBox2.Text;
winmain.Show();
this.Hide();
}
else
{
MessageBox.Show("您输入的帐号或密码有误，请重新登录！","错误",MessageBoxButtons.OK,MessageBoxIcon.Exclamation);
}
}
private void button2_Click(object sender, System.EventArgs e)
{
Application.Exit ();
}
private void textBox1_Enter(object sender, System.EventArgs e)
{
Application.Exit ();
}
private bool CheckUser(string Code,string UserName,string Password)
{
bool IsIn=false;
string source="server=localhost;"+
"uid=sa;pwd=ntdba;"+
"database=zyhx";
string select="select * from admin where code='" + Code.Trim() + "' and passwd='" + Password.Trim() + "'";
try
{
SqlConnection conn = new SqlConnection(source);
conn.Open();
SqlCommand cmd = new SqlCommand(select,conn);
SqlDataReader sql = cmd.ExecuteReader();
while (sql.Read())
{
textBox2.Text = sql["user"].ToString ();
IsIn=true;
}
}
catch(Exception ex)
{
MessageBox.Show(ex.Message);
}
//conn.Close();
return IsIn;
}
[STAThread]
static void Main()
{
login newmain=new login();
Application.Run(newmain);
}
}
}
我想实现，当textbox1输入完毕后，textbox2自动从数据库中读取数据并显示。
问题点数：20、回复次数：30Top
1 楼ntmit（自由的呼吸）回复于 2006-11-11 08:32:01 得分 0
各位大虾，急啊～～～～Top
2 楼ntmit（自由的呼吸）回复于 2006-11-11 09:06:03 得分 0
急啊，在线等～～～～Top
3 楼lizhizhe2000（武安侯）回复于 2006-11-11 09:08:07 得分 20
当textbox１失去焦点时从数据库中取值不就行了!Top
4 楼ntmit（自由的呼吸）回复于 2006-11-11 09:10:21 得分 0
问题我不知道如何使TEXTBOX1失去焦点Top
5 楼bjgzxx（食人一族）回复于 2006-11-11 09:23:47 得分 0
那也不知道你什么时候输入完吗？Top
6 楼ntmit（自由的呼吸）回复于 2006-11-11 09:26:31 得分 0
是这样吗？
private void textBox1_Leave(object sender, System.EventArgs e)
｛
……
｝Top
7 楼free_wang（）回复于 2006-11-11 09:28:25 得分 0
upTop
8 楼ntmit（自由的呼吸）回复于 2006-11-11 09:48:57 得分 0
private void textBox1_Leave(object sender, System.EventArgs e)
{
textBox2.Text = "aa";
}
我加了怎么无效啊？Top
9 楼david_anwei（家九）回复于 2006-11-11 10:19:34 得分 0
private void WipTextBox_Leave(object sender, System.EventArgs e)
{
if(!this.ReadOnly)
{
textBox2.Text = "aa";
}
}
Top
10 楼scow（怡红快绿之小橙子|和谐权是第4代人权）回复于 2006-11-11 10:21:55 得分 0
怎么会无效，在textBox1输入，再把焦点移到textBox2或界面上其他控件，这个事件就会触发Top
11 楼ntmit（自由的呼吸）回复于 2006-11-11 11:00:34 得分 0
问题是它没有触发啊。我把代码贴出来，帮我看看。
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Data.SqlClient;
namespace member
{
/// <summary>
/// login 的摘要说明。
/// </summary>
public class login : System.Windows.Forms.Form
{
private System.Windows.Forms.TextBox textBox1;
private System.Windows.Forms.TextBox textBox2;
private System.Windows.Forms.TextBox textBox3;
private System.Windows.Forms.Button button1;
private System.Windows.Forms.Button button2;
private System.Windows.Forms.Label label1;
private System.Windows.Forms.Label label2;
private System.Windows.Forms.Label label3;
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null;
public login()
{
//
// 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()
{
System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(login));
this.button1 = new System.Windows.Forms.Button();
this.button2 = new System.Windows.Forms.Button();
this.textBox1 = new System.Windows.Forms.TextBox();
this.textBox2 = new System.Windows.Forms.TextBox();
this.textBox3 = new System.Windows.Forms.TextBox();
this.label1 = new System.Windows.Forms.Label();
this.label2 = new System.Windows.Forms.Label();
this.label3 = new System.Windows.Forms.Label();
this.SuspendLayout();
//
// button1
//
this.button1.BackColor = System.Drawing.SystemColors.ActiveCaptionText;
this.button1.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
this.button1.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
this.button1.Location = new System.Drawing.Point(280, 184);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(56, 24);
this.button1.TabIndex = 3;
this.button1.Text = "确 定";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// button2
//
this.button2.BackColor = System.Drawing.SystemColors.ActiveCaptionText;
this.button2.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
this.button2.Location = new System.Drawing.Point(368, 184);
this.button2.Name = "button2";
this.button2.Size = new System.Drawing.Size(56, 24);
this.button2.TabIndex = 4;
this.button2.Text = "取 消";
this.button2.Click += new System.EventHandler(this.button2_Click);
//
// textBox1
//
this.textBox1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
this.textBox1.Location = new System.Drawing.Point(272, 104);
this.textBox1.Name = "textBox1";
this.textBox1.Size = new System.Drawing.Size(160, 21);
this.textBox1.TabIndex = 0;
this.textBox1.Text = "";
//
// textBox2
//
this.textBox2.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
this.textBox2.Enabled = false;
this.textBox2.Location = new System.Drawing.Point(272, 128);
this.textBox2.Name = "textBox2";
this.textBox2.Size = new System.Drawing.Size(160, 21);
this.textBox2.TabIndex = 1;
this.textBox2.Text = "";
//
// textBox3
//
this.textBox3.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
this.textBox3.Location = new System.Drawing.Point(272, 152);
this.textBox3.Name = "textBox3";
this.textBox3.PasswordChar = '*';
this.textBox3.Size = new System.Drawing.Size(160, 21);
this.textBox3.TabIndex = 2;
this.textBox3.Text = "";
//
// label1
//
this.label1.BackColor = System.Drawing.SystemColors.ActiveCaptionText;
this.label1.Location = new System.Drawing.Point(208, 109);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(72, 16);
this.label1.TabIndex = 5;
this.label1.Text = "用户代码：";
//
// label2
//
this.label2.BackColor = System.Drawing.SystemColors.ActiveCaptionText;
this.label2.Location = new System.Drawing.Point(208, 133);
this.label2.Name = "label2";
this.label2.Size = new System.Drawing.Size(72, 16);
this.label2.TabIndex = 6;
this.label2.Text = "用户姓名：";
//
// label3
//
this.label3.BackColor = System.Drawing.SystemColors.ActiveCaptionText;
this.label3.Location = new System.Drawing.Point(208, 157);
this.label3.Name = "label3";
this.label3.Size = new System.Drawing.Size(72, 16);
this.label3.TabIndex = 7;
this.label3.Text = "用户密码：";
//
// login
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.BackgroundImage = ((System.Drawing.Bitmap)(resources.GetObject("$this.BackgroundImage")));
this.ClientSize = new System.Drawing.Size(448, 229);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.textBox3,
this.textBox2,
this.textBox1,
this.button2,
this.button1,
this.label1,
this.label2,
this.label3});
this.MaximizeBox = false;
this.MinimizeBox = false;
this.Name = "login";
this.Text = "会员登录";
this.ResumeLayout(false);
}
#endregion
private void button1_Click(object sender, System.EventArgs e)
{
if (this.CheckUser(this.textBox1.Text.Trim(),this.textBox2.Text.Trim(),this.textBox3.Text.Trim())==true)
{
winmain winmain = new winmain();
classa.Code =textBox1.Text;
classa.User =textBox2.Text;
winmain.Show();
this.Hide();
}
else
{
MessageBox.Show("您输入的帐号或密码有误，请重新登录！","错误",MessageBoxButtons.OK,MessageBoxIcon.Exclamation);
}
}
private void button2_Click(object sender, System.EventArgs e)
{
Application.Exit ();
}
private void textBox1_Enter(object sender, System.EventArgs e)
{
Application.Exit ();
}
private bool CheckUser(string Code,string UserName,string Password)
{
bool IsIn=false;
string source="server=localhost;"+
"uid=sa;pwd=ntdba;"+
"database=zyhx";
string select="select * from admin where code='" + Code.Trim() + "' and passwd='" + Password.Trim() + "'";
try
{
SqlConnection conn = new SqlConnection(source);
conn.Open();
SqlCommand cmd = new SqlCommand(select,conn);
SqlDataReader sql = cmd.ExecuteReader();
while (sql.Read())
{
textBox2.Text = sql["user"].ToString ();
IsIn=true;
}
}
catch(Exception ex)
{
MessageBox.Show(ex.Message);
}
//conn.Close();
return IsIn;
}
[STAThread]
private void textBox1_Leave(object sender, System.EventArgs e)
{
textBox2.Text = "aa";
}
static void Main()
{
login newmain=new login();
Application.Run(newmain);
}
}
}
Top
12 楼zwcscq（）回复于 2006-11-11 11:01:55 得分 0
是不可能实现的...Top
13 楼ntmit（自由的呼吸）回复于 2006-11-11 11:08:57 得分 0
为什么不能实现Top
14 楼scow（怡红快绿之小橙子|和谐权是第4代人权）回复于 2006-11-11 11:19:46 得分 0
在InitializeComponent里面看不到事件注册，也许丢失了，手动注册一下吧Top
15 楼ntmit（自由的呼吸）回复于 2006-11-11 11:35:14 得分 0
怎么注册啊Top
16 楼ntmit（自由的呼吸）回复于 2006-11-11 11:54:10 得分 0
人呢Top
17 楼tipboy（想做技术边缘人）回复于 2006-11-11 12:10:58 得分 0
用验证控件
Top
18 楼ntmit（自由的呼吸）回复于 2006-11-11 12:13:04 得分 0
说详细点，我刚学！Top
19 楼ntmit（自由的呼吸）回复于 2006-11-11 14:57:06 得分 0
郁闷啊Top
20 楼starsong（PB和.NET齐头并进！）回复于 2006-11-11 16:39:45 得分 0
看看InitializeComponent这个里面是否有这个失去焦点的事件，没有就手工加上就ok了Top
21 楼mike_ylp（）回复于 2006-11-11 17:19:22 得分 0
TextBox裡面有個Validated事件，在事件內查詢出你要顯示的數據，條件是TextBox內的值Top
22 楼kellynt（）回复于 2006-11-11 17:43:36 得分 0
我想实现，当textbox1输入完毕后，textbox2自动从数据库中读取数据并显示。
---------------------------------------------------------------------
这个用"焦点"去判断,在winform是很难实现的,且也不稳定,一般的做法是"当textbox1输入完毕后,按回车键执行查询",你的需求如果改成这样就容易实现多了Top
23 楼chuhx（xiaoyao）回复于 2006-11-11 17:57:45 得分 0
要触发textBox2啊
Top
24 楼sguar530（）回复于 2006-11-11 18:49:22 得分 0
好复杂说的Top
25 楼eric2006（）回复于 2006-11-11 23:05:55 得分 0
InitializeComponent这个里面,都没有看到事件注册.
在它里面加上this.textBox1.Click += new System.EventHandler(this.textBox1_Leave);
就行了
Top
26 楼partpass（咔咔）回复于 2006-11-11 23:25:01 得分 0
顶!Top
27 楼superxiaomm（小美）回复于 2006-11-12 09:31:09 得分 0
markTop
28 楼jcyluck（C# + SQL 2005 QQ群：26096739）回复于 2006-11-12 10:40:44 得分 0
试试下面的代码：
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Data.SqlClient;
namespace member
{
/// <summary>
/// login 的摘要说明。
/// </summary>
public class login : System.Windows.Forms.Form
{
private System.Windows.Forms.TextBox textBox1;
private System.Windows.Forms.TextBox textBox2;
private System.Windows.Forms.TextBox textBox3;
private System.Windows.Forms.Button button1;
private System.Windows.Forms.Button button2;
private System.Windows.Forms.Label label1;
private System.Windows.Forms.Label label2;
private System.Windows.Forms.Label label3;
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null;
public login()
{
//
// 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()
{
System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(login));
this.button1 = new System.Windows.Forms.Button();
this.button2 = new System.Windows.Forms.Button();
this.textBox1 = new System.Windows.Forms.TextBox();
this.textBox2 = new System.Windows.Forms.TextBox();
this.textBox3 = new System.Windows.Forms.TextBox();
this.label1 = new System.Windows.Forms.Label();
this.label2 = new System.Windows.Forms.Label();
this.label3 = new System.Windows.Forms.Label();
this.SuspendLayout();
//
// button1
//
this.button1.BackColor = System.Drawing.SystemColors.ActiveCaptionText;
this.button1.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
this.button1.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
this.button1.Location = new System.Drawing.Point(280, 184);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(56, 24);
this.button1.TabIndex = 3;
this.button1.Text = "确 定";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// button2
//
this.button2.BackColor = System.Drawing.SystemColors.ActiveCaptionText;
this.button2.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
this.button2.Location = new System.Drawing.Point(368, 184);
this.button2.Name = "button2";
this.button2.Size = new System.Drawing.Size(56, 24);
this.button2.TabIndex = 4;
this.button2.Text = "取 消";
this.button2.Click += new System.EventHandler(this.button2_Click);
//
// textBox1
//
this.textBox1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
this.textBox1.Location = new System.Drawing.Point(272, 104);
this.textBox1.Name = "textBox1";
this.textBox1.Size = new System.Drawing.Size(160, 21);
this.textBox1.TabIndex = 0;
this.textBox1.Text = "";
this.textBox1.Leave += new System.EventHandler(this.textBox1_Leave);
//
// textBox2
//
this.textBox2.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
this.textBox2.Enabled = false;
this.textBox2.Location = new System.Drawing.Point(272, 128);
this.textBox2.Name = "textBox2";
this.textBox2.Size = new System.Drawing.Size(160, 21);
this.textBox2.TabIndex = 1;
this.textBox2.Text = "";
//
// textBox3
//
this.textBox3.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
this.textBox3.Location = new System.Drawing.Point(272, 152);
this.textBox3.Name = "textBox3";
this.textBox3.PasswordChar = '*';
this.textBox3.Size = new System.Drawing.Size(160, 21);
this.textBox3.TabIndex = 2;
this.textBox3.Text = "";
//
// label1
//
this.label1.BackColor = System.Drawing.SystemColors.ActiveCaptionText;
this.label1.Location = new System.Drawing.Point(208, 109);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(72, 16);
this.label1.TabIndex = 5;
this.label1.Text = "用户代码：";
//
// label2
//
this.label2.BackColor = System.Drawing.SystemColors.ActiveCaptionText;
this.label2.Location = new System.Drawing.Point(208, 133);
this.label2.Name = "label2";
this.label2.Size = new System.Drawing.Size(72, 16);
this.label2.TabIndex = 6;
this.label2.Text = "用户姓名：";
//
// label3
//
this.label3.BackColor = System.Drawing.SystemColors.ActiveCaptionText;
this.label3.Location = new System.Drawing.Point(208, 157);
this.label3.Name = "label3";
this.label3.Size = new System.Drawing.Size(72, 16);
this.label3.TabIndex = 7;
this.label3.Text = "用户密码：";
//
// login
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.BackgroundImage = ((System.Drawing.Bitmap)(resources.GetObject("$this.BackgroundImage")));
this.ClientSize = new System.Drawing.Size(448, 229);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.textBox3,
this.textBox2,
this.textBox1,
this.button2,
this.button1,
this.label1,
this.label2,
this.label3});
this.MaximizeBox = false;
this.MinimizeBox = false;
this.Name = "login";
this.Text = "会员登录";
this.ResumeLayout(false);
}
#endregion
private void button1_Click(object sender, System.EventArgs e)
{
if (this.CheckUser(this.textBox1.Text.Trim(),this.textBox2.Text.Trim(),this.textBox3.Text.Trim())==true)
{
winmain winmain = new winmain();
classa.Code =textBox1.Text;
classa.User =textBox2.Text;
winmain.Show();
this.Hide();
}
else
{
MessageBox.Show("您输入的帐号或密码有误，请重新登录！","错误",MessageBoxButtons.OK,MessageBoxIcon.Exclamation);
}
}
private void button2_Click(object sender, System.EventArgs e)
{
Application.Exit ();
}
private void textBox1_Enter(object sender, System.EventArgs e)
{
Application.Exit ();
}
private bool CheckUser(string Code,string UserName,string Password)
{
bool IsIn=false;
string source="server=localhost;"+
"uid=sa;pwd=ntdba;"+
"database=zyhx";
string select="select * from admin where code='" + Code.Trim() + "' and passwd='" + Password.Trim() + "'";
try
{
SqlConnection conn = new SqlConnection(source);
conn.Open();
SqlCommand cmd = new SqlCommand(select,conn);
SqlDataReader sql = cmd.ExecuteReader();
while (sql.Read())
{
textBox2.Text = sql["user"].ToString ();
IsIn=true;
}
}
catch(Exception ex)
{
MessageBox.Show(ex.Message);
}
//conn.Close();
return IsIn;
}
[STAThread]
private void textBox1_Leave(object sender, System.EventArgs e)
{
textBox2.Text = "aa";
}
static void Main()
{
login newmain=new login();
Application.Run(newmain);
}
}
}
Top
29 楼z2xlong（缦缨客）回复于 2006-11-13 09:36:30 得分 0
同意tipboy(想做技术边缘人) 的办法，使用自定义验证控件，在验证函数内实现回调即可Top
30 楼minwent（）回复于 2006-11-13 14:33:48 得分 0
看msdn关于textbox控件的事件说明。Top
