[英]Vb.net data misplaced
使用Visual Studio 2010,我正在开发一个vb.net应用程序,其中需要在一个表中存储10000条以上的记录。 表格格式为
|empno |year |january|february| march |april |may |june |july |august |September |october |november |december| total|
样本数据:
101 2010 10000 15000 25000
101 2011 15000 20000 35000
101 2012 20000 25000 45000
101 2013 25000 30000 55000
102 2008 1000 1500 2500
102 2009 1500 2000 3500
102 2010 10000 15000 25000
102 2011 15000 20000 35000
102 2012 20000 25000 45000
102 2013 25000 30000 55000
现在的问题是,当我将数据插入此表时,它没有正确存储。 我的意思是,似乎
102 2012 20000 25000 45000
101 2010 10000 15000 25000
101 2011 15000 20000 35000
101 2012 20000 25000 45000
101 2013 25000 30000 55000
102 2008 1000 1500 2500
102 2009 1500 2000 3500
102 2010 10000 15000 25000
102 2011 15000 20000 35000
102 2013 25000 30000 55000
在每组数据中,一年的记录都存储在表格的顶部。 因此,当我显示特定员工的记录时,它无法正确显示(我的意思是顺序不对)。 例如:对于empno 102,结果类似于
102 2012 20000 25000 45000
102 2008 1000 1500 2500
102 2009 1500 2000 3500
102 2010 10000 15000 25000
102 2011 15000 20000 35000
102 2013 25000 30000 55000
我认为按年份排序不是解决方案。 因为,它一年有很多记录。
我检查了所有记录。 只有一些记录存在此问题。 我对这个问题及其解决方法一无所知。 任何人都可以这样做的原因是什么,如何避免?
提前致谢
编辑:代码
If yodor1 <= 2015 Then
up = 2015
ElseIf yodor1 <= 2025 Then
up = 2025
ElseIf yodor1 <= 2035 Then
up = 2035
ElseIf yodor1 <= 2045 Then
up = 2045
End If
con.Open()
txt = "select * from pension where empno='" & TextBox5.Text & "' "
cmd = New SqlCommand(txt, con)
reader = cmd.ExecuteReader()
While reader.Read
If yodor1 <= up Then
flag = False
display2.grid1.set_TextMatrix(a, 0, reader("year"))
display2.grid1.set_TextMatrix(a, 1, reader("january"))
display2.grid1.set_TextMatrix(a, 2, reader("february"))
display2.grid1.set_TextMatrix(a, 3, reader("march"))
display2.grid1.set_TextMatrix(a, 4, reader("april"))
display2.grid1.set_TextMatrix(a, 5, reader("may"))
display2.grid1.set_TextMatrix(a, 6, reader("june"))
display2.grid1.set_TextMatrix(a, 7, reader("july"))
display2.grid1.set_TextMatrix(a, 8, reader("august"))
display2.grid1.set_TextMatrix(a, 9, reader("septemper"))
display2.grid1.set_TextMatrix(a, 10, reader("october"))
display2.grid1.set_TextMatrix(a, 11, reader("november"))
display2.grid1.set_TextMatrix(a, 12, reader("december"))
a = a + 1
yodor1 = yodor1 + 1
ElseIf yodor1 <= (up + 10) Then
flag = False
display2.grid2.set_TextMatrix(b, 0, reader("year"))
display2.grid2.set_TextMatrix(b, 1, reader("january"))
display2.grid2.set_TextMatrix(b, 2, reader("february"))
display2.grid2.set_TextMatrix(b, 3, reader("march"))
display2.grid2.set_TextMatrix(b, 4, reader("april"))
display2.grid2.set_TextMatrix(b, 5, reader("may"))
display2.grid2.set_TextMatrix(b, 6, reader("june"))
display2.grid2.set_TextMatrix(b, 7, reader("july"))
display2.grid2.set_TextMatrix(b, 8, reader("august"))
display2.grid2.set_TextMatrix(b, 9, reader("septemper"))
display2.grid2.set_TextMatrix(b, 10, reader("october"))
display2.grid2.set_TextMatrix(b, 11, reader("november"))
display2.grid2.set_TextMatrix(b, 12, reader("december"))
b = b + 1
yodor1 = yodor1 + 1
ElseIf yodor1 <= (yodor + 19) Then
flag = False
DISPLAY3.grid2.set_TextMatrix(f, 0, reader("year"))
DISPLAY3.grid2.set_TextMatrix(f, 1, reader("january"))
DISPLAY3.grid2.set_TextMatrix(f, 2, reader("february"))
DISPLAY3.grid2.set_TextMatrix(f, 3, reader("march"))
DISPLAY3.grid2.set_TextMatrix(f, 4, reader("april"))
DISPLAY3.grid2.set_TextMatrix(f, 5, reader("may"))
DISPLAY3.grid2.set_TextMatrix(f, 6, reader("june"))
DISPLAY3.grid2.set_TextMatrix(f, 7, reader("july"))
DISPLAY3.grid2.set_TextMatrix(f, 8, reader("august"))
DISPLAY3.grid2.set_TextMatrix(f, 9, reader("septemper"))
DISPLAY3.grid2.set_TextMatrix(f, 10, reader("october"))
DISPLAY3.grid2.set_TextMatrix(f, 11, reader("november"))
DISPLAY3.grid2.set_TextMatrix(f, 12, reader("december"))
f = f + 1
yodor1 = yodor1 + 1
ElseIf yodor1 < (yodor + 30) Then
flag = False
DISPLAY3.grid1.set_TextMatrix(c, 0, reader("year"))
DISPLAY3.grid1.set_TextMatrix(c, 1, reader("january"))
DISPLAY3.grid1.set_TextMatrix(c, 2, reader("february"))
DISPLAY3.grid1.set_TextMatrix(c, 3, reader("march"))
DISPLAY3.grid1.set_TextMatrix(c, 4, reader("april"))
DISPLAY3.grid1.set_TextMatrix(c, 5, reader("may"))
DISPLAY3.grid1.set_TextMatrix(c, 6, reader("june"))
DISPLAY3.grid1.set_TextMatrix(c, 7, reader("july"))
DISPLAY3.grid1.set_TextMatrix(c, 8, reader("august"))
DISPLAY3.grid1.set_TextMatrix(c, 9, reader("septemper"))
DISPLAY3.grid1.set_TextMatrix(c, 10, reader("october"))
DISPLAY3.grid1.set_TextMatrix(c, 11, reader("november"))
DISPLAY3.grid1.set_TextMatrix(c, 12, reader("december"))
c = c + 1
yodor1 = yodor1 + 1
End If
End While
reader.Close()
con.Close()
首先,最好使用参数化查询来防止SQL注入 。 在查询中添加ORDER BY
子句以按year
对记录进行排序
尝试这个 :
txt = "select * from pension where empno= @empno ORDER BY year"
cmd = New SqlCommand(txt, con)
cmd.Parameters.AddWithValue("@empno", TextBox5.Text)
最后,我找到了答案。 我用过Clear()方法
display2.grid1.clear()
display2.grid2.clear()
DISPLAY3.grid1.clear()
DISPLAY3.grid2.clear()
现在我的问题解决了
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