ArcEngine代码 GP栅格计算器以及表达式的写法描述

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        /// <summary>
        /// GP栅格计算器
        /// </summary>
        /// <param name="expression">表达式</param>
        /// <param name="output_raster">输出地址</param>
        private void GPRasterCalculatorAnalyst(string expression, string output_raster)
        {
            //string a1 = "C:\\Users\\54061\\Documents\\ArcGIS\\Default.gdb" + "\\" + "Reclass_Extr2";
            //string a2 = "C:\\Users\\54061\\Documents\\ArcGIS\\Default.gdb" + "\\" + "Reclass_Slop1";