在C#中关于excel的导入和导出操作

一、先来看看最常见的导入操作吧!

private void Import()
{
//打开excel选择框
OpenFileDialog frm = new OpenFileDialog();
frm.Filter = "Excel文件(*.xls,xlsx)|*.xls;*.xlsx";
if (frm.ShowDialog() == DialogResult.OK)
{

string excelName = frm.FileName;
Workbook excel = new Workbook(excelName);
List<string[]> importyString=GetImportExcelRoute(excel);
}
}

//循环遍历获取excel的中每行每列的值
public List<string[]> GetImportExcelRoute(Workbook excel)
{
int icount = excel.Worksheets.Count;

List<string[]> routList = new List<string[]>();
for (int i = 0; i < icount; i++)
{
Worksheet sheet = excel.Worksheets[i];
Cells cells = sheet.Cells;
int rowcount = cells.MaxRow;
int columncount = cells.MaxColumn;

int routNameColumn = 0;
int routAttachColumn = 0;
int routDescColumn = 0;
int routMesgColumn = 0;

//获取标题所在的列
if (rowcount > 0 && columncount > 0)
{
//找到对应的列信息
int r0 = 2;
for (int c = 0; c <= columncount; c++)
{
string strVal = cells[r0, c].StringValue.Trim();
if (strVal == "备注")
{
routDescColumn = c;
break;
}
}

r0 = 3;
for (int c = 0; c <= columncount; c++)
{
//获取文本框内容
string strVal = cells[r0, c].StringValue.Trim();
if (strVal == "审批明细事项")
{
routNameColumn = c;
}
if (strVal == "细项")
{
routMesgColumn = c;
}
if (strVal == "前置条件及工作要求")
{
routAttachColumn = c;
}
}
//找到对应标题列下面的值
if (routNameColumn > 0 && routAttachColumn > 0 && routDescColumn > 0)
{//在从对应的列中找到对应的值
for (int r = 4; r <= rowcount; r++)
{
string[] str = new string[6];
string strRoutName = "";
string strRoutMesg = "";
string strRoutAttach = "";
string strRoutDesc = "";
string strRoutRole = "";
string strRoutPro = "";
for (int c = 0; c <= columncount; c++)
{
int mergcolumncount = 0;
int mergrowcount = 0;

bool ismerged = cells[r, c].IsMerged;//是否合并单元格
if (ismerged)
{
Range range = cells[r, c].GetMergedRange();

if (range != null)
{
mergcolumncount = range.ColumnCount;
mergrowcount = range.RowCount;
}
}
//获取文本框内容
string strVal = "";
strVal = cells[r, c].StringValue.Trim();
if (c == routNameColumn)
{
strRoutName = strVal;
if (mergrowcount > 1 && string.IsNullOrEmpty(strRoutName))
{
strRoutName = GetRoutName(routList, 0);
}
}
if (c == routMesgColumn)
{
strRoutMesg = strVal;
if (mergrowcount > 1 && string.IsNullOrEmpty(strRoutMesg))
{
strRoutMesg = GetRoutName(routList, 1);
}
}
if (c == routAttachColumn)
{
strRoutAttach = strVal;
}
if (c == routDescColumn)
{
strRoutDesc = strVal;
}

}
}
}

可以看到导入是比较简单的，就是循环读取每行每列的值，可以看到文中有不少Cells这个属性，这个需要用到第三方的插件：using Aspose.Cells;需要在网上下载一个 Aspose.Cells的dll.

二、导出，就是将数据组合好后导成excel格式：

private void Export()
{
SaveFileDialog frm = new SaveFileDialog();
frm.Filter = "Excel文件(*.xls,xlsx)|*.xls;*.xlsx";
frm.FileName = flowName + ".xlsx";
if (frm.ShowDialog() == DialogResult.OK)
{
string strpath = frm.FileName;
Workbook workbook = null;
string strpath = _exportFlowRoutExcelPath;
if (File.Exists(strpath))
{
workbook = new Workbook(strpath);
}
else
{
workbook = new Workbook();
}
Worksheet sheet = workbook.Worksheets[0]; //工作表
Cells cells = sheet.Cells;//单元格
string str="";//获取要导出的数据

try
{
RoutExportToExcel(workbook,cells,str);

MessageBox.Show("导出成功！");
}
catch
{
MessageBox.Show("导出失败！");
}
}
}
}

public void RoutExportToExcel(Workbook workbook, Cells cells,string str)
{
分别得到行和列
int routCount =0;//;
int rowcount = 4 + routCount;
int columnCount = 25;
for (int i = 0; i < rowcount; i++)
{
Style style = SettingCellStyle(workbook, cells);
if (i == 0)
{
style.Font.Color = Color.Red;
style.Font.Size = 16;
cells.Merge(0, 0, 1, columnCount);//合并单元格
cells[i, 0].PutValue("综合管线决策授权体系事项");//填写内容
cells[0, 0].SetStyle(style);//给单元格关联样式
cells.SetRowHeight(0, 38);//设置行高
cells.SetColumnWidth(1, 20);//设置列宽
}
if (i > 0)
{
string routeName = "";
string routeNote = "";
string routeCondition = "";
string guid = "";
if (i > 3)
{
cells.SetRowHeight(i, 42);//设置行高
JsonObject routJsonObj = routeJsonArray[i - 4] as JsonObject;
routeName = routJsonObj["routName"] == null ? "" : routJsonObj["routName"].ToString();
routeNote = routJsonObj["note"] == null ? "" : routJsonObj["note"].ToString();
routeCondition = routJsonObj["condition"] == null ? "" : routJsonObj["condition"].ToString();
guid = routJsonObj["guid"] == null ? "" : routJsonObj["guid"].ToString();
}
for (int j = 0; j < columnCount; j++)
{
cells[i, j].SetStyle(style);//给单元格关联样式
//填充行
if (i > 3)
{
if (j == 0)//序号
{
cells[i, j].PutValue(i - 3);//填写内容
}
else if (j == 4 || j == 5 || j == 24)//审批明细事项 细项 备注
{
FillExcelRoutProperty(i,j,style,cells,routeName,routeNote,routeCondition);
}
else if (j == 2 || j == 3 || j == 6 || j == 7 || j == 8 || j == 10 || j == 11 || j == 12 || j == 13)//类别、分类、层级或板块、地区、管线、前置条件责任部门及责任人、审核校对验收责任部门及责任人、具体审核校对验收要求、发起人
{
FillExcelRoutExtProperty(i, j, guid, style, cells,routExtPropertyJsonArray);
}
else if (j >= 14 && j <= 23)//路由角色变量（从审批人1到终审人）
{
FillExcelRoutRoleVal(i,j,guid,style,cells,routRoleValjsonArray);
}
else if (j == 9)//前置条件及工作要求
{
FillExcelRoutPreConditon(i,j,guid,style,cells,routPreConditonJsonArray);
}
}
else
{
SettingCellStyleAndLine(cells, i, j);//设置excel的标题行和列
}
}
}
}
}

/// <summary>
/// 设置单元格样式及线条
/// </summary>
/// <param name="cells"></param>
/// <param name="i"></param>
/// <param name="j"></param>
public void SettingCellStyleAndLine(Cells cells, int i, int j)
{
if (i == 1)
{
if (j == 0)
{
cells.Merge(1, j, 3, 1);//合并单元格
cells[i, j].PutValue("序号");//填写内容
cells.SetColumnWidth(j, 5);//设置列宽
}
if (j == 1)
{
cells.Merge(1, j, 3, 1);//合并单元格
cells.SetColumnWidth(j, 5);//设置列宽
}
}
}

/// <summary>
/// 设置单元格的样式
/// </summary>
/// <param name="workbook"></param>
/// <param name="cells"></param>
/// <returns></returns>
public Style SettingCellStyle(Workbook workbook, Cells cells)
{
Style style = workbook.Styles[workbook.Styles.Add()];//新增样式
style.HorizontalAlignment = TextAlignmentType.Center;//文字居中
style.Font.Name = "宋体";//文字字体
style.Font.Size = 10;//文字大小
style.IsLocked = false;//单元格解锁
style.Font.IsBold = false;//粗体
style.ForegroundColor = Color.FromArgb(255, 255, 255);//设置背景色
style.Pattern = BackgroundType.Solid; //设置背景样式
style.IsTextWrapped = true;//单元格内容自动换行
style.Borders[BorderType.LeftBorder].LineStyle = CellBorderType.Thin; //应用边界线 左边界线
style.Borders[BorderType.RightBorder].LineStyle = CellBorderType.Thin; //应用边界线 右边界线
style.Borders[BorderType.TopBorder].LineStyle = CellBorderType.Thin; //应用边界线 上边界线
style.Borders[BorderType.BottomBorder].LineStyle = CellBorderType.Thin; //应用边界线 下边界线
return style;
}