C# 如何将筛选后的数据从SQL Server导出到Excel?
我有一个WinForm,用于过滤数据库中的数据并将其显示到DataGridView中。为了过滤,我放置了一个组合框,其中显示数据库中列的名称并可以选择,还有一个文本框,用户可以在其中键入关键字或短语。然后用户单击过滤器按钮执行过滤 我还有一个将数据库表导出到Excel文件的按钮 我的筛选方法:C# 如何将筛选后的数据从SQL Server导出到Excel?,c#,sql-server,excel,winforms,datagridview,C#,Sql Server,Excel,Winforms,Datagridview,我有一个WinForm,用于过滤数据库中的数据并将其显示到DataGridView中。为了过滤,我放置了一个组合框,其中显示数据库中列的名称并可以选择,还有一个文本框,用户可以在其中键入关键字或短语。然后用户单击过滤器按钮执行过滤 我还有一个将数据库表导出到Excel文件的按钮 我的筛选方法: protected void searchFilter() { DataTable dt; BindingSource bs = new BindingSource
protected void searchFilter()
{
DataTable dt;
BindingSource bs = new BindingSource();
_db.conn();
_db.cmd.CommandText = "SELECT * FROM IncomingLog";
dt = _db.executeDT();
DataView dv = new DataView(dt);
incomLogTableS.DataSource = dv;
String cmbCat = cmbFilterIDLS.GetItemText(cmbFilterIDLS.SelectedValue.ToString());
String keyID = keyIDLS.Text;
if (cmbCat != "Select Category")
{
if (cmbCat == "Received Date")
{
dv.RowFilter = string.Format("[Date Received] LIKE '%{0}%'", keyID);
}
else if (cmbCat == "Reference Number")
{
dv.RowFilter = string.Format("[Reference Number] LIKE '%{0}%'", keyID);
}
else if (cmbCat == "Received Time")
{
dv.RowFilter = string.Format("[Time Received] LIKE '%{0}%'", keyID);
}
else if (cmbCat == "Title/Description")
{
dv.RowFilter = string.Format("[Title/Description] LIKE '%{0}%'", keyID);
}
else if (cmbCat == "Originating Office")
{
dv.RowFilter = string.Format("[Originating Office] LIKE '%{0}%'", keyID);
}
else if (cmbCat == "Received By")
{
dv.RowFilter = string.Format("[Receiving Person] LIKE '%{0}%'", keyID);
}
else if (cmbCat == "Filed Under")
{
dv.RowFilter = string.Format("[Filed Under] LIKE '%{0}%'", keyID);
}
else
{
dv.RowFilter = string.Format("[Encoded By] LIKE '%{0}%'", keyID);
}
}
else
{
MessageBox.Show("Please select a category to search!", "Select category", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
}
if (dv.Count == 0)
{
MessageBox.Show("No records found! \nPlease try with different keyword(s).", "(0) Records Found", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
导出按钮的方法:
private void exportIDLS_Click(object sender, EventArgs e)
{
searchFilter();
string data = null;
int i = 0;
int j = 0;
Excel.Application xlApp;
Excel.Workbook xlWorkBook;
Excel.Worksheet xlWorkSheet;
Excel.Range range;
object misValue = System.Reflection.Missing.Value;
xlApp = new Excel.Application();
xlWorkBook = xlApp.Workbooks.Add(misValue);
xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1);
DataSet ds = new DataSet();
ds.Tables.Add(dt);
for (i = 0; i <= ds.Tables[0].Rows.Count - 1; i++)
{
for (j = 0; j <= ds.Tables[0].Columns.Count - 1; j++)
{
xlWorkSheet.Cells[1, i + 1] = dt.Columns[i].ColumnName;
range = xlWorkSheet.Cells[1, j + 1];
range.Interior.ColorIndex = 15;
range.Font.Bold = true;
range.HorizontalAlignment = Excel.XlHAlign.xlHAlignCenter;
data = ds.Tables[0].Rows[i].ItemArray[j].ToString();
xlWorkSheet.Cells[i + 2, j + 1] = data;
}
}
Microsoft.Office.Interop.Excel.Range columns = xlWorkSheet.UsedRange.Columns;
columns.AutoFit();
xlApp.StandardFont = "Arial";
xlApp.StandardFontSize = 11;
xlWorkSheet.Rows[1].Insert();
Excel.Range newRow = xlWorkSheet.Rows[1];
Excel.Range newCell = newRow.Cells[1];
newCell.Value = "Incoming Documents Log Summary";
newCell.Font.Size = 12;
newCell.Font.Bold = true;
xlWorkBook.SaveAs("Incoming Documents Log Summary.xls", Excel.XlFileFormat.xlWorkbookNormal, misValue, misValue, misValue, misValue, Excel.XlSaveAsAccessMode.xlExclusive, misValue, misValue, misValue, misValue, misValue);
xlWorkBook.Close(true, misValue, misValue);
xlApp.Quit();
releaseObject(xlWorkSheet);
releaseObject(xlWorkBook);
releaseObject(xlApp);
MessageBox.Show("Success! Incoming Documents Log Summary.xls is created! \nPlease look at the Documents folder.", "Excel file created!", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
这正在工作,但导出的Excel文件将从数据库获取所有数据。要使导出按钮从过滤后的DataGridView获取数据,我可以做什么
请帮帮我。多谢各位 使用DataView.ToTable方法获得过滤结果:
DataTable dtFiltered = dv.ToTable();
for (i = 0; i <= dtFiltered.Rows.Count - 1; i++)
{
for (j = 0; j <= dtFiltered.Columns.Count - 1; j++)
{
或者在exportIDLS_Click事件中,从DataGridViews数据源获取DataView:
DataView dv = (DataView)incomLogTableS.DataSource;
DataTable dtFiltered = dv.ToTable();
如果要在Excel中保留网格样式,可以在此处查看我的答案:
:
你好正如你所说,我尝试了ToTable方法,得到了一个空白的Excel文件。我把它放在导出按钮的方法上。我还为DataView创建了一个新实例。这里出了什么问题?还有一个过滤器按钮,它使用searchFilter方法进行过滤。我把ToTable方法放在那里了吗?谢谢
DataView dv = (DataView)incomLogTableS.DataSource;
DataTable dtFiltered = dv.ToTable();