1.直接将DataGridView显示的内容导出Excel
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public void DataToExcel(DataGridView m_DataView)
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{
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SaveFileDialog kk = new SaveFileDialog();
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kk.Title = "保存EXECL文件";
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kk.Filter = "EXECL文件(*.xls) |*.xls |所有文件(*.*) |*.*";
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kk.FilterIndex = 1;
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if (kk.ShowDialog() == DialogResult.OK)
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{
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string FileName = kk.FileName + ".xls";
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if (File.Exists(FileName))
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File.Delete(FileName);
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FileStream objFileStream;
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StreamWriter objStreamWriter;
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string strLine = "";
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objFileStream = new FileStream(FileName, FileMode.OpenOrCreate, FileAccess.Write);
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objStreamWriter = new StreamWriter(objFileStream, System.Text.Encoding.Unicode);
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for (int i = 0; i < m_DataView.Columns.Count; i++)
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{
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if (m_DataView.Columns[i].Visible == true)
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{
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strLine = strLine + m_DataView.Columns[i].HeaderText.ToString() + Convert.ToChar(9);
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}
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}
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objStreamWriter.WriteLine(strLine);
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strLine = "";
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for (int i = 0; i < m_DataView.Rows.Count; i++)
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{
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if (m_DataView.Columns[0].Visible == true)
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{
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if (m_DataView.Rows[i].Cells[0].Value == null)
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strLine = strLine + " " + Convert.ToChar(9);
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else
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strLine = strLine + m_DataView.Rows[i].Cells[0].Value.ToString() + Convert.ToChar(9);
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}
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for (int j = 1; j < m_DataView.Columns.Count; j++)
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{
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if (m_DataView.Columns[j].Visible == true)
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{
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if (m_DataView.Rows[i].Cells[j].Value == null)
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strLine = strLine + " " + Convert.ToChar(9);
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else
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{
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string rowstr = "";
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rowstr = m_DataView.Rows[i].Cells[j].Value.ToString();
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if (rowstr.IndexOf("\r\n") > 0)
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rowstr = rowstr.Replace("\r\n", " ");
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if (rowstr.IndexOf("\t") > 0)
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rowstr = rowstr.Replace("\t", " ");
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strLine = strLine + rowstr + Convert.ToChar(9);
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}
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}
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}
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objStreamWriter.WriteLine(strLine);
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strLine = "";
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}
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objStreamWriter.Close();
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objFileStream.Close();
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MessageBox.Show(this,"保存EXCEL成功","提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
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}
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}

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2.用DataGridView绑定的DataTable为参数,导出Excel
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public void DataToExcel(DataTable m_DataTable)
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{
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SaveFileDialog kk = new SaveFileDialog();
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kk.Title = "保存EXECL文件";
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kk.Filter = "EXECL文件(*.xls) |*.xls |所有文件(*.*) |*.*";
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kk.FilterIndex = 1;
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if (kk.ShowDialog() == DialogResult.OK)
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{
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string FileName = kk.FileName + ".xls";
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if (File.Exists(FileName))
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File.Delete(FileName);
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FileStream objFileStream;
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StreamWriter objStreamWriter;
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string strLine = "";
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objFileStream = new FileStream(FileName, FileMode.OpenOrCreate, FileAccess.Write);
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objStreamWriter = new StreamWriter(objFileStream, System.Text.Encoding.Unicode);
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for (int i = 0; i < m_DataTable.Columns.Count; i++)
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{
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strLine = strLine + m_DataTable.Columns[i].Caption.ToString() + Convert.ToChar(9);
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}
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objStreamWriter.WriteLine(strLine);
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strLine = "";
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for (int i = 0; i < m_DataTable.Rows.Count; i++)
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{
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for (int j = 0; j < m_DataTable.Columns.Count; j++)
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{
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if (m_DataTable.Rows[i].ItemArray[j] == null)
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strLine = strLine + " " + Convert.ToChar(9);
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else
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{
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string rowstr = "";
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rowstr = m_DataTable.Rows[i].ItemArray[j].ToString();
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if (rowstr.IndexOf("\r\n") > 0)
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rowstr = rowstr.Replace("\r\n", " ");
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if (rowstr.IndexOf("\t") > 0)
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rowstr = rowstr.Replace("\t", " ");
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strLine = strLine + rowstr + Convert.ToChar(9);
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}
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}
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objStreamWriter.WriteLine(strLine);
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strLine = "";
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}
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objStreamWriter.Close();
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objFileStream.Close();
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MessageBox.Show(this, "保存EXCEL成功", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
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}
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}

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