使用C#和Excel进行报表开发－用程序绑定数据源

本文演示一个简单的办法，并使用程序将一个dataset中的内容填充到指定的格子中，目的是尽可能的通用，从而避免C#代码必须知道Excel文件中字段和内容的位置的情况。

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"

);






}

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

;


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);




}

(Exception ex)

{


MessageBox.Show(ex.Message);


}

{


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();


}

}

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

;


}

}

{


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

;


}

}

(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

;


}

colText;


}

运行完成后，生成的Excel如下图：