C# COM组件操作Excel

一、使用微软COM组件读Excle

将Excle中的变量信息读入varInfoDic, 其定义如下：

Dictionary<int, List<VarInfo>> varInfoDic = new Dictionary<int, List<VarInfo>>();

VarInfo类的定义如下：

    public class VarInfo

    {

        public string varType;

        public string varName;

        public int varByteOffset;

    }

这个读Excle的函数，实现如下：

private void readVarInfoXLSX()
{
int canId = 0;
string strCanId;
string strVarByteOffset;
Microsoft.Office.Interop.Excel.Application excelApp = new Microsoft.Office.Interop.Excel.Application();
Workbook tempWorkbook = null;
Worksheet tempSheet = null;
Range tempRange = null;

try
{
if (varInfoDic.Count != 0)
{
varInfoDic.Clear();
}

if (canIdValidList.Count != 0)
{
canIdValidList.Clear();
}

// 打开Excel文件
tempWorkbook = excelApp.Workbooks.Open(varInfoFile, Missing.Value, Missing.Value, Missing.Value,
Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value,
Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value);

excelApp.Visible = false; //false
// 获取第一个sheet
tempSheet = (Worksheet)tempWorkbook.Sheets[1];
tempSheet.Activate();

for (int row = varInfoValidStartRow; row <= tempSheet.UsedRange.Rows.Count; row++)
{
VarInfo tempVarInfo = new VarInfo();
tempRange = (Range)tempSheet.Cells[row, 1];
strCanId = tempRange.Text.ToString().Trim();

if (!string.IsNullOrWhiteSpace(strCanId))
{
canId = Convert.ToInt32(strCanId, 16);
tempRange = (Range)tempSheet.Cells[row, 2];
tempVarInfo.varType = tempRange.Text.ToString().Trim();
if (!canIdValidList.Contains(canId))
{
canIdValidList.Add(canId);
}

tempRange = (Range)tempSheet.Cells[row, 3];
tempVarInfo.varName = tempRange.Text.ToString().Trim();

tempRange = (Range)tempSheet.Cells[row, 4];
strVarByteOffset = tempRange.Text.ToString().Trim();
tempVarInfo.varByteOffset = Convert.ToInt32(strVarByteOffset);

if (varInfoDic.ContainsKey(canId))
{
List<VarInfo> tempList;
varInfoDic.TryGetValue(canId, out tempList);
tempList.Add(tempVarInfo);
}
else
{
List<VarInfo> tempVarInfoList = new List<VarInfo>();
tempVarInfoList.Add(tempVarInfo);
varInfoDic.Add(canId, tempVarInfoList);
}
}
else
{
//待加入容错处理
continue;
}
}
}
catch (Exception ex)
{
MessageBox.Show("Read variable information error! Please do it again!", "Warning", MessageBoxButtons.OK, MessageBoxIcon.Warning);
Console.WriteLine("[readVarInfoXLSX] Function Error!");
}
finally
{
// 释放资源
tempSheet = null;
tempWorkbook.Close();
tempWorkbook = null;
excelApp.Workbooks.Close();
excelApp.Quit();
excelApp = null;
}
}

二、使用微软COM组件写Excle