使用C#和Excel进行报表开发（八）－用程序绑定数据源

最新推荐文章于 2025-04-25 12:26:45 发布

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最新推荐文章于 2025-04-25 12:26:45 发布

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先制作一个简单的Excel文件作为模板，为了防止要填充的Cell中的内容和标题的内容一样，所以要填充内容的Cell中的内容是“$” + 字段名(要和DataTable中的列名一致），效果如图：

创建一个Winform程序，给窗体上添加两个按钮，代码分别为：
创建Xml：

private void button1_Click( object sender, EventArgs e)

{

DataColumn dcName = new DataColumn("name", typeof(string));

DataColumn dcAge = new DataColumn("age", typeof(int));

DataColumn dcMemo = new DataColumn("memo", typeof(string));

DataTable dt = new DataTable();

dt.Columns.Add(dcName);

dt.Columns.Add(dcAge);

dt.Columns.Add(dcMemo);

DataRow dr = dt.NewRow();

dr["name"] = "dahuzizyd";

dr["age"] = "20";

dr["memo"] = "dahuzizyd.cnblogs.com";

dt.Rows.Add(dr);

dt.AcceptChanges();

DataSet ds = new DataSet();

ds.Tables.Add(dt);

ds.WriteXml(Application.StartupPath +"\\ExcelBindingXml.xml");

}

提取xml并且加载到Excel模板上，再另存：

private void button2_Click( object sender, EventArgs e)

{

DataSet ds = new DataSet();

ds.ReadXml(Application.StartupPath + "\\ExcelBindingXml.xml");

Excel.Application m_objExcel = null;

Excel._Workbook m_objBook = null;

Excel.Sheets m_objSheets = null;

Excel._Worksheet m_objSheet = null;

Excel.Range m_objRange = null;

object m_objOpt = System.Reflection.Missing.Value;

try

{

m_objExcel = new Excel.Application();

m_objBook = m_objExcel.Workbooks.Open(Application.StartupPath + "\\ExcelTemplate.xls", m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt);

m_objSheets = (Excel.Sheets)m_objBook.Worksheets;

m_objSheet = (Excel._Worksheet)(m_objSheets.get_Item(1));

foreach (DataRow dr in ds.Tables[0].Rows)

{

for (int col = 0; col < ds.Tables[0].Columns.Count; col++)

{

for (int excelcol = 1; excelcol < 8; excelcol++)

{

for (int excelrow = 1; excelrow < 5; excelrow++)

{

string excelColName = ExcelColNumberToColText(excelcol);

m_objRange = m_objSheet.get_Range(excelColName + excelrow.ToString(), m_objOpt);

if ( m_objRange.Text.ToString().Replace("$","") == ds.Tables[0].Columns[col].ColumnName )

{

m_objRange.Value2 = dr[col].ToString();

}

m_objExcel.DisplayAlerts = false;

m_objBook.SaveAs(Application.StartupPath + "\\ExcelBindingXml.xls", m_objOpt, m_objOpt,

m_objOpt, m_objOpt, m_objOpt, Excel.XlSaveAsAccessMode.xlNoChange,

m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt);

}

catch (Exception ex)

{

MessageBox.Show(ex.Message);

}

finally

{

m_objBook.Close(m_objOpt, m_objOpt, m_objOpt);

m_objExcel.Workbooks.Close();

m_objExcel.Quit();

System.Runtime.InteropServices.Marshal.ReleaseComObject(m_objBook);

System.Runtime.InteropServices.Marshal.ReleaseComObject(m_objExcel);

m_objBook = null;

m_objExcel = null;

GC.Collect();

}

下面是一个辅助函数，主要是将整数的列序号转换到Excel用的以字母表示的列号，Excel最大列数为255。

private string ExcelColNumberToColText( int colNumber)

{

string colText = "";

int colTextLength = colNumber / 26;

int colTextLast = colNumber % 26;

if (colTextLast != 0)

{

switch (colTextLength)

{

case 0: break;

case 1: colText = "A"; break;

case 2: colText = "B"; break;

case 3: colText = "C"; break;

case 4: colText = "D"; break;

case 5: colText = "E"; break;

case 6: colText = "F"; break;

case 7: colText = "G"; break;

case 8: colText = "H"; break;

case 9: colText = "I"; break;

default: break;

}

else

{

switch (colTextLength)

{

case 1: colText = ""; break;

case 2: colText = "A"; break;

case 3: colText = "B"; break;

case 4: colText = "C"; break;

case 5: colText = "D"; break;

case 6: colText = "E"; break;

case 7: colText = "F"; break;

case 8: colText = "G"; break;

case 9: colText = "H"; break;

default: break;

}

switch (colTextLast)

{

case 0:colText = colText + "Z"; break;

case 1: colText = colText + "A"; break;

case 2: colText = colText + "B"; break;

case 3: colText = colText + "C"; break;

case 4: colText = colText + "D"; break;

case 5: colText = colText + "E"; break;

case 6: colText = colText + "F"; break;

case 7: colText = colText + "G"; break;

case 8: colText = colText + "H"; break;

case 9: colText = colText + "I"; break;

case 10: colText = colText + "J"; break;

case 11: colText = colText + "K"; break;

case 12: colText = colText + "L"; break;

case 13: colText = colText + "M"; break;

case 14: colText = colText + "N"; break;

case 15: colText = colText + "O"; break;

case 16: colText = colText + "P"; break;

case 17: colText = colText + "Q"; break;

case 18: colText = colText + "R"; break;

case 19: colText = colText + "S"; break;

case 20: colText = colText + "T"; break;

case 21: colText = colText + "U"; break;

case 22: colText = colText + "V"; break;

case 23: colText = colText + "W"; break;

case 24: colText = colText + "X"; break;

case 25: colText = colText + "Y"; break;

default: break;

}

return colText;

}

运行完成后，生成的Excel如下图：

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