<pre id=\"best-answer-content\" class=\"reply-text mb10\">//判断是否已存在此用户名
public static readonly string _strcon = ConfigurationSettings.AppSettings[\"strcon\"];
public int IsExistUserInfo(string UserName)
{
//定义数据库的Connection and Command
SqlConnection conn=new SqlConnection(string _strcon);
SqlCommand cmd = new SqlCommand(\"IsExistUserInfo\",conn);
//定义访问数据库的方式
cmd.CommandType = CommandType.StoredProcedure;
//定义缓存参数
string paramIsExistUserInfo=\"UserName\";
//创建访问数据库的参数
SqlParameter[] paramCache = Common.GetCachedParameters(paramIsExistUserInfo);
if(paramCache == null)
{
paramCache = new SqlParameter[]{
new SqlParameter(\"@UserName\",SqlDbType.VarChar,50)};
Common.CacheParameters(paramIsExistUserInfo,paramCache);
}
Common.AddMyCommandParams(cmd,paramCache);
paramCache[0].Value = UserName;
int i=-1;
try
{
//打开数据库的连接
if(conn.State != ConnectionState.Open)
{
conn.Open();
}
}
catch(Exception ex)
{
throw new MyException(\"10001\",\"数据库连接失败!\",ex);
}
try
{
//执行操作（访问数据库）
i = (int)cmd.ExecuteScalar();
}
catch(Exception ex)
{
throw new MyException(\"10001\",ex.Message,ex);
}
finally
{
//关闭数据库的连接
cmd.Dispose();
conn.Close();
}
return i;
}
存储过程
CREATE PROCEDURE IsExistUserInfo
@UserName varchar(50)
AS
Select Count(*) As total 表名 from
Where 用户名=@UserName
GO
在web.config设置数据库连接语句
appSettings
add key=\"strcon\" value=\"server=SINEWEB-F2E4D55\\SQLSERVER2000;database=数据库名;uid=数据库用户名;pwd=数据库密码;Pooling=true;Connect Timeout=100;Max Pool Size=512;Min Pool Size=0;\"/add
/appSettings |
