C# Interop 将数组数组写入工作表答案

【问题标题】：C# Interop write array of arrays to worksheetC# Interop 将数组数组写入工作表
【发布时间】：2017-08-22 12:49:40
【问题描述】：

我正在尝试将二维数组写入工作表，但出现以下错误：

指定的数组不是预期的类型。

这是我的代码：

            string[][] allEvars = new string[evars.Count][];

            for (var i = 0; i < evars.Count; i++) {
                var evarsList = new List<string>();
                evarsList.Add(evars[i].id.Value);
                evarsList.Add(evars[i].name.Value);
                if (evars[i].enabled != null)
                    evarsList.Add(evars[i].enabled.Value.ToString());
                else
                    evarsList.Add("");
                if (evars[i].description != null)
                    evarsList.Add(evars[i].description.Value);
                else
                    evarsList.Add("");
                string[] evarsArray = evarsList.ToArray();
                //var range = (Excel.Range)wsEvars.Range[wsEvars.Cells[i + 5, 2], wsEvars.Cells[i + 5, evarsArray.Length]];
                //range.Value = evarsArray;
                allEvars[i] = evarsList.ToArray();
            }
            var range = (Excel.Range)wsEvars.Range[wsEvars.Cells[5, 2], wsEvars.Cells[allEvars.Length, 3]];
            range.Value2 = allEvars; // This is the line with the exception

我的代码中的 2 行注释将数组一一添加到工作表中，我试图一次将它们全部添加以节省一些时间。

【问题讨论】：

标签： c# arrays excel interop

【解决方案1】：

您可以将数组数组转换为二维数组。从此使用 Jon Skeet 方法 answer

static T[,] CreateRectangularArray<T>(T[][] arrays)
    {
        // TODO: Validation and special-casing for arrays.Count == 0
        int minorLength = arrays[0].Length;
        T[,] ret = new T[arrays.Length, minorLength];
        for (int i = 0; i < arrays.Length; i++)
        {
            var array = arrays[i];
            if (array.Length != minorLength)
            {
                throw new ArgumentException
                    ("All arrays must be the same length");
            }
            for (int j = 0; j < minorLength; j++)
            {
                ret[i, j] = array[j];
            }
        }
        return ret;
    }

在您的代码中：

        string[][] allEvars = new string[evars.Count][];

        for (var i = 0; i < evars.Count; i++) {
            var evarsList = new List<string>();
            evarsList.Add(evars[i].id.Value);
            evarsList.Add(evars[i].name.Value);
            if (evars[i].enabled != null)
                evarsList.Add(evars[i].enabled.Value.ToString());
            else
                evarsList.Add("");
            if (evars[i].description != null)
                evarsList.Add(evars[i].description.Value);
            else
                evarsList.Add("");
            string[] evarsArray = evarsList.ToArray();
            //var range = (Excel.Range)wsEvars.Range[wsEvars.Cells[i + 5, 2], wsEvars.Cells[i + 5, evarsArray.Length]];
            //range.Value = evarsArray;
            allEvars[i] = evarsList.ToArray();
        }
        var range = (Excel.Range)wsEvars.Range[wsEvars.Cells[5, 2], wsEvars.Cells[allEvars.Length, 3]];
        string[,] newallEvars = CreateRectangularArray<string>(allEvars); //added row
        range.Value2 = newallEvars; // changed row

【讨论】：