我的代码应该在导出到Excel时包含标题文本。
For i As Integer = 0 To DataGridView2.Rows.Count - 2
For j As Integer = 0 To DataGridView2.Columns.Count - 1
' Excel index starts from 1,1. As first Row would have the Column headers, adding a condition check.
If cellRowIndex = 1 Then
worksheet.Cells(cellRowIndex, cellColumnIndex) = DataGridView2.Columns(j).HeaderText
Else
worksheet.Cells(cellRowIndex, cellColumnIndex) = DataGridView2.Rows(i).Cells(j).Value
End If
cellColumnIndex += 1
Next
cellColumnIndex = 1
cellRowIndex += 1
Next
但是,此代码将第一个数据行替换为标题文本,而不是将其插入上面。如果我删除提取标题文本的If语句,我会将所有行都删除,但我不会获得标题文本。
For i As Integer = 0 To DataGridView2.Rows.Count - 2
For j As Integer = 0 To DataGridView2.Columns.Count - 1
worksheet.Cells(cellRowIndex, cellColumnIndex) = DataGridView2.Rows(i).Cells(j).Value
cellColumnIndex += 1
Next
cellColumnIndex = 1
cellRowIndex += 1
Next
关于如何解决这个问题的任何想法?
答案 0 :(得分:2)
下面的代码创建一个带有DataGridView标头的Excel文件。我在Visual Studio 2010中测试过它。首先,您必须添加Microsoft Office程序集的引用。
Microsoft.Office.Interop.Excel(Version - 12.0.0.0)
Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
Dim xlApp As Microsoft.Office.Interop.Excel.Application
Dim xlWorkBook As Microsoft.Office.Interop.Excel.Workbook
Dim xlWorkSheet As Microsoft.Office.Interop.Excel.Worksheet
Dim misValue As Object = System.Reflection.Missing.Value
Dim i As Integer
Dim j As Integer
xlApp = New Microsoft.Office.Interop.Excel.Application
xlWorkBook = xlApp.Workbooks.Add(misValue)
xlWorkSheet = xlWorkBook.Sheets("sheet1")
For i = 0 To DataGridView1.RowCount - 2
For j = 0 To DataGridView1.ColumnCount - 1
For k As Integer = 1 To DataGridView1.Columns.Count
xlWorkSheet.Cells(1, k) = DataGridView1.Columns(k - 1).HeaderText
xlWorkSheet.Cells(i + 2, j + 1) = DataGridView1(j, i).Value.ToString()
Next
Next
Next
xlWorkSheet.SaveAs("C:\vbToexcel.xlsx")
xlWorkBook.Close()
xlApp.Quit()
releaseObject(xlApp)
releaseObject(xlWorkBook)
releaseObject(xlWorkSheet)
MsgBox("File successfully created - C:\vbToexcel.xlsx") End Sub
Private Sub releaseObject(ByVal obj As Object)
Try
System.Runtime.InteropServices.Marshal.ReleaseComObject(obj)
obj = Nothing
Catch ex As Exception
obj = Nothing
Finally
GC.Collect()
End Try End Sub
答案 1 :(得分:1)
在跟踪代码后,很明显您在两个for
循环中遇到了索引问题。您提供的代码似乎缺少第一行数据。
正如你评论的那样:
此代码用标题文本替换第一个数据行,而不是将其插入 ...
这是不正确的,它不是替换它只是跳过DataGridView
中第一行数据的行。以下是您要解释的代码。
For i As Integer = 0 To DataGridView1.Rows.Count - 2
For j As Integer = 0 To DataGridView1.Columns.Count - 1
If cellRowIndex = 1 Then
worksheet.Cells(cellRowIndex, cellColumnIndex) = DataGridView1.Columns(j).HeaderText
Else
worksheet.Cells(cellRowIndex, cellColumnIndex) = DataGridView1.Rows(i).Cells(j).Value
End If
cellColumnIndex += 1
Next
cellColumnIndex = 1
cellRowIndex += 1
Next
基本上,这会遍历行,然后是列。问题出在If
语句和索引i
中。在这个If
语句中,您检查这是否是第一次获取标题。如果是第一次将标题写入excel并继续。这将跳过第一行数据,因为循环变量i
被用作具有赋值的DataGridView行的索引:
worksheet.Cells(cellRowIndex, cellColumnIndex) = DataGridView1.Rows(i).Cells(j).Value
进入j
循环时,i
周围的第一次为零(0)。使用cellRowIndex
进行检查以确定是否需要输出标头。在这种情况下,他们会...输出标题然后退出此if
并循环回到下一个标题。输出所有标头后,退出j
循环并循环回i
循环。这会将i
增加到1并输入j
循环...由于i
在输出标题时已经为0,我们将跳过/错过DataGridView
中的第0行。我希望这是有道理的。
您所拥有的简单解决方案就是在-1处使用以下内容启动i
:
For i As Integer = -1 To DataGridView1.Rows.Count - 2
这将解决您遇到的问题,但代码不易遵循。我建议使用foreach
循环来循环DataGridView
行并将列输出与行输出分开。这确实创建了两个循环,但第一个循环只会循环一次以添加标题。下一个循环遍历所有行。这将使索引更容易处理,并且将来更容易阅读。
For Each column In DataGridView1.Columns
worksheet.Cells(1, column.Index + 1).Value = column.Name
Next
Dim rowIndex = 2
For Each row As DataGridViewRow In DataGridView1.Rows
If Not row.IsNewRow Then
For colIndex As Integer = 0 To DataGridView1.Columns.Count - 1
worksheet.Cells(rowIndex, colIndex + 1).Value = row.Cells(colIndex).Value.ToString
Next
End If
rowIndex += 1
Next
希望这有帮助。