c#图书管理系统源代码.pdf

1.登陆界面

主要代码：

public partial class LoginForm : Form{

public static string uacc;

public static string upsw;

public static string uname;

public static string usex;

public static string upart;

public static string uright;

if ( this .useracctxt.Text.Trim() == "" && this .pswtxt.Text == "" )

{

MessageBox.Show( " 请输入您的用户名和密码！ " , " 提示！ " );

return ;

}

try

{

string sql;

sql = "select * from tb_user where uacc='" + this .useracctxt.Text + "' and upsw='"

+ this .pswtxt.Text + "'" ;

uname = dr[ "uname"].ToString();

1.登陆界面

主要代码：

public partial class LoginForm : Form{

public static string uacc;

public static string upsw;

public static string uname;

public static string usex;

public static string upart;

public static string uright;

if ( this .useracctxt.Text.Trim() == "" && this .pswtxt.Text == "" )

{

MessageBox.Show( " 请输入您的用户名和密码！ " , " 提示！ " );

return ;

}

try

{

string sql;

sql = "select * from tb_user where uacc='" + this .useracctxt.Text + "' and upsw='"

+ this .pswtxt.Text + "'" ;

uname = dr[ "uname"].ToString();

1.登陆界面

主要代码：

public partial class LoginForm : Form{

public static string uacc;

public static string upsw;

public static string uname;

public static string usex;

public static string upart;

public static string uright;

if ( this .useracctxt.Text.Trim() == "" && this .pswtxt.Text == "" )

{

MessageBox.Show( " 请输入您的用户名和密码！ " , " 提示！ " );

return ;

}

try

{

string sql;

sql = "select * from tb_user where uacc='" + this .useracctxt.Text + "' and upsw='"

+ this .pswtxt.Text + "'" ;

uname = dr[ "uname"].ToString();

1.登陆界面

主要代码：

public partial class LoginForm : Form{

public static string uacc;

public static string upsw;

public static string uname;

public static string usex;

public static string upart;

public static string uright;

if ( this .useracctxt.Text.Trim() == "" && this .pswtxt.Text == "" )

{

MessageBox.Show( " 请输入您的用户名和密码！ " , " 提示！ " );

return ;

}

try

{

string sql;

sql = "select * from tb_user where uacc='" + this .useracctxt.Text + "' and upsw='"

+ this .pswtxt.Text + "'" ;

uname = dr[ "uname"].ToString();

1.登陆界面

主要代码：

public partial class LoginForm : Form{

public static string uacc;

public static string upsw;

public static string uname;

public static string usex;

public static string upart;

public static string uright;

if ( this .useracctxt.Text.Trim() == "" && this .pswtxt.Text == "" )

{

MessageBox.Show( " 请输入您的用户名和密码！ " , " 提示！ " );

return ;

}

try

{

string sql;

sql = "select * from tb_user where uacc='" + this .useracctxt.Text + "' and upsw='"

+ this .pswtxt.Text + "'" ;

uname = dr[ "uname"].ToString();