C#操作Excel文件(读取Excel，写入Excel)
看到论坛里面不断有人提问关于读取excel和导入excel的相关问题。闲暇时间将我所知道的对excel的操作加以总结，现在共享大家，希望给大家能够给大家带了一定的帮助。
另外我们还要注意一些简单的问题1.excel文件只能存储65535行数据，如果你的数据大于65535行，那么就需要将excel分割存放了。2.关于乱码，这主要是字符设置问题。
1.加载Excel（读取excel内容）返回值是一个DataSet
//加载Excel
public static DataSet LoadDataFromExcel(string filePath)
{
try
{
string strConn;
strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filePath + ";Extended Properties='Excel 8.0;HDR=False;IMEX=1'";
OleDbConnection OleConn = new OleDbConnection(strConn);
OleConn.Open();
String sql = "SELECT * FROM [Sheet1$]";//可是更改Sheet名称，比如sheet2，等等
OleDbDataAdapter OleDaExcel = new OleDbDataAdapter(sql, OleConn);
DataSet OleDsExcle = new DataSet();
OleDaExcel.Fill(OleDsExcle, "Sheet1");
OleConn.Close();
return OleDsExcle;
}
catch (Exception err)
{
MessageBox.Show("数据绑定Excel失败!失败原因：" + err.Message, "提示信息",
MessageBoxButtons.OK, MessageBoxIcon.Information);
return null;
}
}
2.写入Excel内容，参数：excelTable是要导入excel的一个table表
public static bool SaveDataTableToExcel(System.Data.DataTable excelTable, string filePath)
{
Microsoft.Office.Interop.Excel.Application app =
new Microsoft.Office.Interop.Excel.ApplicationClass();
try
{
app.Visible = false;
Workbook wBook = app.Workbooks.Add(true);
Worksheet wSheet = wBook.Worksheets[1] as Worksheet;
if (excelTable.Rows.Count > 0)
{
int row = 0;
row = excelTable.Rows.Count;
int col = excelTable.Columns.Count;
for (int i = 0; i < row; i++)
{
for (int j = 0; j < col; j++)
{
string str = excelTable.Rows[i][j].ToString();
wSheet.Cells[i + 2, j + 1] = str;
}
}
}
int size = excelTable.Columns.Count;
for (int i = 0; i < size; i++)
{
wSheet.Cells[1, 1 + i] = excelTable.Columns[i].ColumnName;
}
//设置禁止弹出保存和覆盖的询问提示框
app.DisplayAlerts = false;
app.AlertBeforeOverwriting = false;
//保存工作簿
wBook.Save();
//保存excel文件
app.Save(filePath);
app.SaveWorkspace(filePath);
app.Quit();
app = null;
return true;
}
catch (Exception err)
{
MessageBox.Show("导出Excel出错！错误原因：" + err.Message, "提示信息",
MessageBoxButtons.OK, MessageBoxIcon.Information);
return false;
}
finally
{
}
}
C#实现在Excel中将连续多列相同数据项合并
效果图如下：
代码如下：
/** <summary>
/// 合并工作表中指定行数和列数数据相同的单元格
/// </summary>
/// <param name="sheetIndex">工作表索引</param>
/// <param name="beginRowIndex">开始行索引</param>
/// <param name="beginColumnIndex">开始列索引</param>
/// <param name="rowCount">要合并的行数</param>
/// <param name="columnCount">要合并的列数</param>
public void MergeWorkSheet(int sheetIndex,int beginRowIndex,int beginColumnIndex,int rowCount,int columnCount)
{
//检查参数
if ( columnCount < 1 || rowCount < 1)
return ;
for(int col=0;col<columnCount;col++)
{
int mark = 0; //标记比较数据中第一条记录位置
int mergeCount = 1; //相同记录数，即要合并的行数
string text = "";
for(int row=0;row<rowCount;row++)
{
string prvName = "";
string nextName = "";
//最后一行不用比较
if( row + 1 < rowCount)
{
for(int n=0;n<=col;n++)
{
range = (Excel.Range)workSheet.Cells[row + beginRowIndex,n + beginColumnIndex];
range = (Excel.Range)range.MergeArea.get_Item(1,1);
text = range.Text.ToString();
prvName = prvName + text;
range = (Excel.Range)workSheet.Cells[row + 1 + beginRowIndex,n + beginColumnIndex];
range = (Excel.Range)range.MergeArea.get_Item(1,1);
nextName = nextName + range.Text.ToString();
}
if(prvName == nextName)
{
mergeCount++;
if(row == rowCount - 2)
{
this.MergeCells(sheetIndex,beginRowIndex + mark,beginColumnIndex + col,beginRowIndex + mark + mergeCount - 1,beginColumnIndex + col,text);
}
}
else
{
this.MergeCells(sheetIndex,beginRowIndex + mark,beginColumnIndex + col,beginRowIndex + mark + mergeCount - 1,beginColumnIndex + col,text);
mergeCount = 1;
mark = row + 1;
}
}
}
}
}
