C# 一些简单算法

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     //Excel导入数据库
    private DataSet CreateDataSource()
    {
        string strCon;
        strCon = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath("/net_admin/exportcj/excel.xls") + "; Extended Properties=Excel 8.0;";
        OleDbConnection olecon = new OleDbConnection(strCon);
        OleDbDataAdapter myda = new OleDbDataAdapter("SELECT * FROM [Sheet1$]", strCon);
        DataSet myds = new DataSet();
        myda.Fill(myds);
        return myds;
    }

/// <summary>
/// 字符串过滤
/// </summary>
/// <param name="strvalue">传来参数</param>
/// <returns>过滤后的字符串</returns>
public string FilterStr(string strvalue)
{
     string strfilter = ";|%|*|and|exec|insert|select|delete|update|count|chr|mid|master|truncate|char|declare|script";
     string[] strfil = strfilter.Split('|');
     foreach ( string str in strfil)
     {
     strvalue = strvalue.Replace(str,"");
     }
     return strvalue;
}