1
我知道這應該很簡單，但是如何將DataGridView導出/保存爲excel？如何將數據網格保存爲vb.net中的excel？
A
回答
1
它需要是本機XLS文件嗎？您最好的選擇可能只是將數據導出爲CSV文件，這是一種純文本且相當容易生成的文件。對於大多數用戶，CSV默認情況下會在Excel中打開，因此他們不會知道區別。
0
這裏有一些代碼用於在我們的許多應用程序中執行此操作。我們有一個特殊的方法來清理「不可導出」列。此外，我們不會在沒有標題的情況下導出列，但您可以根據需要調整該邏輯。
編輯：代碼格式化程序不喜歡vb.net - 你可以複製/粘貼到visual studio，它會沒事的。
Public Overloads Shared Function BuildExcel(ByVal gView As System.Web.UI.WebControls.GridView) As String
PrepareGridViewForExport(gView)
Dim excelDoc As New StringBuilder
Dim startExcelXML As String = " " + _
" " + _
" " + _
" " + _
" " + _
" " + _
" " + _
" " + _
" "
Dim endExcelXML As String = ""
Dim rowCount As Int64 = 0
Dim sheetCount As Int16 = 1
excelDoc.Append(startExcelXML)
excelDoc.Append("")
excelDoc.Append("")
' write out column headers
excelDoc.Append("")
For x As Int32 = 0 To gView.Columns.Count - 1
'Only write out columns that have column headers.
If Not gView.Columns(x).HeaderText = String.Empty Then
excelDoc.Append("")
excelDoc.Append(gView.Columns(x).HeaderText.ToString)
excelDoc.Append("")
End If
Next
excelDoc.Append("")
For r As Int32 = 0 To gView.Rows.Count - 1
rowCount += rowCount
If rowCount = 64000 Then
rowCount = 0
sheetCount += sheetCount
excelDoc.Append("")
excelDoc.Append(" ")
excelDoc.Append("")
excelDoc.Append("")
End If
excelDoc.Append("")
For c As Int32 = 0 To gView.Rows(r).Cells.Count - 1
'Don't write out a column without a column header.
If Not gView.Columns(c).HeaderText = String.Empty Then
Dim XMLstring As String = gView.Rows(r).Cells(c).Text
XMLstring = XMLstring.Trim()
XMLstring = XMLstring.Replace("&", "&")
XMLstring = XMLstring.Replace(">", ">")
XMLstring = XMLstring.Replace("" + "")
excelDoc.Append(XMLstring)
excelDoc.Append("")
End If
Next
excelDoc.Append("")
Next
excelDoc.Append("")
excelDoc.Append(" ")
excelDoc.Append(endExcelXML)
Return excelDoc.ToString
End Function
Shared Sub PrepareGridViewForExport(ByVal gview As System.Web.UI.Control)
' Cleans up grid for exporting. Takes links and visual elements and turns them into text.
Dim lb As New System.Web.UI.WebControls.LinkButton
Dim l As New System.Web.UI.WebControls.Literal
Dim name As String = String.Empty
For i As Int32 = 0 To gview.Controls.Count - 1
If TypeOf gview.Controls(i) Is System.Web.UI.WebControls.LinkButton Then
l.Text = CType(gview.Controls(i), System.Web.UI.WebControls.LinkButton).Text
gview.Controls.Remove(gview.Controls(i))
gview.Controls.AddAt(i, l)
ElseIf TypeOf gview.Controls(i) Is System.Web.UI.WebControls.DropDownList Then
l.Text = CType(gview.Controls(i), System.Web.UI.WebControls.DropDownList).SelectedItem.Text
gview.Controls.Remove(gview.Controls(i))
gview.Controls.AddAt(i, l)
ElseIf TypeOf gview.Controls(i) Is System.Web.UI.WebControls.CheckBox Then
l.Text = CType(gview.Controls(i), System.Web.UI.WebControls.CheckBox).Checked.ToString
gview.Controls.Remove(gview.Controls(i))
gview.Controls.AddAt(i, l)
End If
If gview.Controls(i).HasControls() Then
PrepareGridViewForExport(gview.Controls(i))
End If
Next
End Sub
0
嘗試了這一點，這是一個觸摸比Brendans簡單，但不能作爲「功能豐富」：
Protected Sub btnExport_Click(ByVal sender As Object, ByVal e As System.EventArgs)
'Export to excel
Response.Clear()
Response.Buffer = True
Response.ContentType = "application/vnd.ms-excel"
Response.Charset = ""
Me.EnableViewState = False
Dim oStringWriter As System.IO.StringWriter = New System.IO.StringWriter
Dim oHtmlTextWriter As System.Web.UI.HtmlTextWriter = New System.Web.UI.HtmlTextWriter(oStringWriter)
Me.ClearControls(gvSearchTerms)
gvSearchTerms.RenderControl(oHtmlTextWriter)
Response.Write(oStringWriter.ToString)
Response.End()
End Sub
Private Sub ClearControls(ByVal control As Control)
Dim i As Integer = (control.Controls.Count - 1)
Do While (i >= 0)
ClearControls(control.Controls(i))
i = (i - 1)
Loop
If Not (TypeOf control Is TableCell) Then
If (Not (control.GetType.GetProperty("SelectedItem")) Is Nothing) Then
Dim literal As LiteralControl = New LiteralControl
control.Parent.Controls.Add(literal)
Try
literal.Text = CType(control.GetType.GetProperty("SelectedItem").GetValue(control, Nothing), String)
Catch ex As System.Exception
End Try
control.Parent.Controls.Remove(control)
ElseIf (Not (control.GetType.GetProperty("Text")) Is Nothing) Then
Dim literal As LiteralControl = New LiteralControl
control.Parent.Controls.Add(literal)
literal.Text = CType(control.GetType.GetProperty("Text").GetValue(control, Nothing), String)
control.Parent.Controls.Remove(control)
End If
End If
Return
End Sub
Public Overrides Sub VerifyRenderingInServerForm(ByVal control As Control)
Return
End Sub
0
你可以使用水晶，因爲它被內置到VS.使用適當的列預定義水晶報表，然後您可以使用您用於數據網格或網格視圖的任何數據源。
Dim report_source As CrystalDecisions.Web.CrystalReportSource
report_source.ReportDocument.SetDataSource(dt) 'DT IS A DATATABLE
report_source.Report.FileName = "test.rpt"
report_source.ReportDocument.Refresh()
report_source.ReportDocument.ExportToDisk(CrystalDecisions.Shared.ExportFormatType.Excel, "c:\test.xls")
1
我會再次警告做一個double for循環來取出每個datacell的數據，並單獨寫出一個excel單元格。相反，使用2D對象數組，並循環訪問您的數據網格，將所有數據保存在那裏。然後，您可以設置一個等於該2D對象數組的Excel範圍。
這將比寫入excel逐個單元更快幾個數量級。有些報告說，我一直在研究這個過去需要兩個小時才能完成出口的報告已經減少到不到一分鐘。
1
我設置了GridView和再使用的HTML文本編寫對象吐出來的.xls文件，像這樣：
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
'get the select command of the gridview
sqlGridview.SelectCommand = Session("strSql")
gvCompaniesExport.DataBind()
lblTemp.Text = Session("strSql")
'do the export
doExport()
'close the window
Dim closeScript As String = "<script language='javascript'> window.close() </scri"
closeScript = closeScript & "pt>"
'split the ending script tag across a concatenate to keep it from causing problems
'this will write it to the asp.net page and fire it off, closing the window
Page.RegisterStartupScript("closeScript", closeScript)
End Sub
Public Sub doExport()
Response.AddHeader("content-disposition", "attachment;filename=IndianaCompanies.xls")
Response.ContentType = "application/vnd.ms-excel"
Response.Charset = ""
Me.EnableViewState = False
Dim objStrWriter As New System.IO.StringWriter
Dim objHtmlTextWriter As New System.Web.UI.HtmlTextWriter(objStrWriter)
'Get the gridview HTML from the control
gvCompaniesExport.RenderControl(objHtmlTextWriter)
'writes the dg info
Response.Write(objStrWriter.ToString())
Response.End()
End Sub
2
你可以使用這個庫進行更詳細的格式
http://www.carlosag.net/Tools/ExcelXmlWriter/
頁面中有樣本。
1
我用這一切的時候：
public static class GridViewExtensions
{
public static void ExportToExcel(this GridView gridView, string fileName, IEnumerable<string> excludeColumnNames)
{
//Prepare Response
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.AddHeader("content-disposition",
string.Format("attachment; filename={0}", fileName));
HttpContext.Current.Response.ContentType = "application/ms-excel";
using (StringWriter sw = new StringWriter())
{
using (HtmlTextWriter htw = new HtmlTextWriter(sw))
{
// Create a table to contain the grid
Table table = new Table();
// include the gridline settings
table.GridLines = gridView.GridLines;
// add the header row to the table
if (gridView.HeaderRow != null)
{
PrepareControlForExport(gridView.HeaderRow);
table.Rows.Add(gridView.HeaderRow);
}
// add each of the data rows to the table
foreach (GridViewRow row in gridView.Rows)
{
PrepareControlForExport(row);
table.Rows.Add(row);
}
// add the footer row to the table
if (gridView.FooterRow != null)
{
PrepareControlForExport(gridView.FooterRow);
table.Rows.Add(gridView.FooterRow);
}
// Remove unwanted columns (header text listed in removeColumnList arraylist)
foreach (DataControlField column in gridView.Columns)
{
if (excludeColumnNames != null && excludeColumnNames.Contains(column.HeaderText))
{
column.Visible = false;
}
}
// render the table into the htmlwriter
table.RenderControl(htw);
// render the htmlwriter into the response
HttpContext.Current.Response.Write(sw.ToString());
HttpContext.Current.Response.End();
}
}
}
/// <summary>
/// Replace any of the contained controls with literals
/// </summary>
/// <param name="control"></param>
private static void PrepareControlForExport(Control control)
{
for (int i = 0; i < control.Controls.Count; i++)
{
Control current = control.Controls[i];
if (current is LinkButton)
{
control.Controls.Remove(current);
control.Controls.AddAt(i, new LiteralControl((current as LinkButton).Text));
}
else if (current is ImageButton)
{
control.Controls.Remove(current);
control.Controls.AddAt(i, new LiteralControl((current as ImageButton).AlternateText));
}
else if (current is HyperLink)
{
control.Controls.Remove(current);
control.Controls.AddAt(i, new LiteralControl((current as HyperLink).Text));
}
else if (current is DropDownList)
{
control.Controls.Remove(current);
control.Controls.AddAt(i, new LiteralControl((current as DropDownList).SelectedItem.Text));
}
else if (current is CheckBox)
{
control.Controls.Remove(current);
control.Controls.AddAt(i, new LiteralControl((current as CheckBox).Checked ? "True" : "False"));
}
if (current.HasControls())
{
PrepareControlForExport(current);
}
}
}
}
0
首次進口COM庫Microsoft Excel對象
示例代碼：
Public Sub exportOfficePCandWorkstation(ByRef mainForm As Form1, ByVal Location As String, ByVal WorksheetName As String)
Dim xlApp As New Excel.Application
Dim xlWorkBook As Excel.Workbook
Dim xlWorkSheet As Excel.Worksheet
Dim misValue As Object = System.Reflection.Missing.Value
Dim Header(23) As String
Dim HeaderCell(23) As String
Header = {"No.", "PC Name", "User", "E-mail", "Department/Location", "CPU Model", "CPU Processor", "CPU Speed", "CPU HDD#1", "CPU HDD#2", "CPU Memory", "CPU OS", "CPU Asset Tag", "CPU MAC Address", "Monitor 1 Model", "Monitor Serial Number", "Monitor2 Model", "Monitor2 Serial Number", "Office", "Wi-LAN", "KVM Switch", "Attachment", "Remarks", "Date and Time"}
HeaderCell = {"A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X"}
xlWorkBook = xlApp.Workbooks.Add
xlWorkSheet = xlWorkBook.Sheets("Sheet1")
xlWorkSheet.Name = WorksheetName
xlApp.Visible = True
xlWorkSheet.Application.ActiveWindow.SplitRow = 1
xlWorkSheet.Application.ActiveWindow.SplitColumn = 3
xlWorkSheet.Application.ActiveWindow.FreezePanes = True
With xlWorkSheet
For count As Integer = 0 To 23
.Range(HeaderCell(count) & 1).Value = Header(count)
Next
With .Range("A1:X1")
.Interior.Color = 1
With .Font
.Size = 16
.ColorIndex = 2
.Name = "Times New Roman"
End With
End With
For i = 0 To mainForm.DataGridView1.RowCount - 1
For j = 0 To mainForm.DataGridView1.ColumnCount - 1
If mainForm.DataGridView1(j, i).Value.ToString = "System.Byte[]" Then
xlWorkSheet.Cells(i + 2, j + 2) = "Attached"
Else
xlWorkSheet.Cells(i + 2, j + 2) = mainForm.DataGridView1(j, i).Value.ToString()
End If
Next
.Range("A" & i + 2).Value = (i + 1).ToString
Next
With .Range("A:Z")
.EntireColumn.AutoFit()
End With
With .Range("B2:X" & mainForm.DataGridView1.RowCount + 1)
.HorizontalAlignment = Excel.XlVAlign.xlVAlignJustify
End With
With .Range("A1:A" & mainForm.DataGridView1.RowCount + 1)
.HorizontalAlignment = Excel.XlVAlign.xlVAlignCenter
End With
'-----------------------------------Insert Border Lines--------------------------------------
With .Range("A1:X" & mainForm.DataGridView1.RowCount + 1)
With .Borders(Excel.XlBordersIndex.xlEdgeLeft)
.LineStyle = Excel.XlLineStyle.xlDouble
.ColorIndex = 0
.TintAndShade = 0
.Weight = Excel.XlBorderWeight.xlThin
End With
With .Borders(Excel.XlBordersIndex.xlEdgeTop)
.LineStyle = Excel.XlLineStyle.xlContinuous
.ColorIndex = 0
.TintAndShade = 0
.Weight = Excel.XlBorderWeight.xlThin
End With
With .Borders(Excel.XlBordersIndex.xlEdgeBottom)
.LineStyle = Excel.XlLineStyle.xlContinuous
.ColorIndex = 0
.TintAndShade = 0
.Weight = Excel.XlBorderWeight.xlThin
End With
With .Borders(Excel.XlBordersIndex.xlEdgeRight)
.LineStyle = Excel.XlLineStyle.xlContinuous
.ColorIndex = 0
.TintAndShade = 0
.Weight = Excel.XlBorderWeight.xlThin
End With
With .Borders(Excel.XlBordersIndex.xlInsideVertical)
.LineStyle = Excel.XlLineStyle.xlContinuous
.ColorIndex = 0
.TintAndShade = 0
.Weight = Excel.XlBorderWeight.xlThin
End With
With .Borders(Excel.XlBordersIndex.xlInsideHorizontal)
.LineStyle = Excel.XlLineStyle.xlContinuous
.ColorIndex = 0
.TintAndShade = 0
.Weight = Excel.XlBorderWeight.xlThin
End With
End With
End With
xlWorkSheet.SaveAs(Location)
xlWorkBook.Close()
xlApp.Quit()
MsgBox("Export Record successful", MsgBoxStyle.Information, "Export to Excel")
End Sub
我使用SaveFileDialog中的具體位置，以創建Excel
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我認爲你的代碼被消毒了或者什麼的，因爲它沒有意義。 – 2008-09-24 12:34:44