提示错误：SqlHelper”并不包含“CacheParameters”的定义？好心人教教我初学者
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ NewsManager.cs

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/// <summary>
///NewsManager 的摘要说明
/// </summary>
public class NewsManager
{
private const string SQL_INSERT_NEWSINFO = "INSERT INTO newsinfo VALUES(@title,@data,@date,@imageurl,@category)";
private const string PARM_NEWS_TITLE = "@title";
private const string PARM_NEWS_DATA = "@data";
private const string PARM_NEWS_DATE = "@date";
private const string PARM_NEWS_CATEGORY = "@category";
private const string PARM_NEWS_IMAGEURL = "@imageurl";
public NewsManager()
{
//
//TODO: 在此处添加构造函数逻辑
//
}
public bool AddNwes(string newsTitle, string newsData, string newsCategory, string imageUrl)
{
StringBuilder strSQL = new StringBuilder();
SqlParameter[] newsParms = GetParameters();
SqlCommand cmd = new SqlCommand();
newsParms[0].Value = newsTitle;
newsParms[1].Value = newsData;
newsParms[2].Value = DateTime.Now;
newsParms[3].Value = imageUrl;
newsParms[4].Value = newsCategory;
foreach (SqlParameter parm in newsParms) cmd.Parameters.Add(parm);
using (SqlConnection conn = new SqlConnection(SqlHelper.ConnectionStringLocalTransaction))
{
strSQL.Append(SQL_INSERT_NEWSINFO);
conn.Open();
cmd.Connection = conn;
cmd.CommandType = CommandType.Text;
cmd.CommandText = strSQL.ToString();
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
if (val > 0)
return true;
else
return false;
}
}
private static SqlParameter[] GetParameters()
{
SqlParameter[] parms = SqlHelper.GetCachedParameters(SQL_INSERT_NEWSINFO);
if (parms == null)
{
parms = new SqlParameter[]{
new SqlParameter (PARM_NEWS_TITLE,SqlDbType.NVarChar ,20),
new SqlParameter (PARM_NEWS_DATA,SqlDbType.NVarChar ,500),
new SqlParameter (PARM_NEWS_DATE,SqlDbType.DateTime),
new SqlParameter (PARM_NEWS_IMAGEURL,SqlDbType.NVarChar ,50),
new SqlParameter (PARM_NEWS_CATEGORY,SqlDbType.NVarChar ,20),
};
SqlHelper.CacheParameters(SQL_INSERT_NEWSINFO, parms); return parms;
}
}
}






~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ SqlHelper.cs

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/// <summary>
///SqlHelper 的摘要说明
/// </summary>
public class SqlHelper
{

public static readonly string ConnectionStringLocalTransaction = ConfigurationManager.ConnectionStrings["NewsConnectionString"].ConnectionString;
private static Hashtable parmCache = Hashtable.Synchronized(new Hashtable());

public static SqlParameter[ ] GetCachedParameters(string cacheKey)
{
SqlParameter[] cachedParms =( SqlParameter[]) parmCache[cacheKey];

if(cachedParms==null)
return null;
SqlParameter[] clonedParms = new SqlParameter[cachedParms.Length];
for(int i=0, j= cachedParms.Length; i<j;i++)
clonedParms[i] = ( SqlParameter)((ICloneable)cachedParms[i]).Clone();
return clonedParms;
}
public SqlHelper()
{

//
//TODO: 在此处添加构造函数逻辑
//
}
}


[解决办法]
SqlHelper这个类中 没有CacheParameters方法
[解决办法]
SqlHelper类中，未定义CacheParameters成员。
[解决办法]
CacheParameters没有定义，检查你的SqlHelper类