ASP.NET中将字符串转换成bool类型

使用方法一要 添加com组件引用

 Interop.MSScriptControl.dll

页面代码：

protected void Page_Load(object sender, EventArgs e)
    {
        string str_Expression1 = "3>1 and 3>2 and 6>=8";
         Response.Write(StringToBoll2(str_Expression1));

        string str_Expression2 = "8>6 and 4>7 and 9>8";
        Response.Write(StringToBoll1(str_Expression2));

        Response.End();
    }

    /// <summary>
    /// 方法一：将字符串转换为BOOL
    /// </summary>
    /// <param name="Expression">表达式</param>
    /// <returns></returns>
    public string StringToBoll1(string Expression)
    {
        string strResult = null;

        try
        {
            MSScriptControl.ScriptControlClass script = new MSScriptControl.ScriptControlClass();
            script.Language = "VBscript";
            strResult = script.Eval(Expression).ToString();
        }
        catch (Exception ex)
        {
            Response.Write(ex.Message);
        }
        return strResult;
    }

    /// <summary>
    /// 方法二：将字符串转换为BOOL
    /// </summary>
    /// <param name="Expression">表达式</param>
    /// <returns></returns>
    public string StringToBoll2(string Expression)
    {
        DataTable dt = new DataTable();
        return (dt.Compute(Expression, "").ToString());
    }
}