我有以下问题,我正在使用vb.net开发诊所应用程序,医生可以使用复选框添加医疗信息checkbox2.text =" Allergy" textbox15.text是过敏的注释,如果患者的FileNo(Textbox2.text)不存在,我想插入记录,如果确实只是更新了注释,到目前为止我能够点击3次按钮后更新它我不知道为什么????
任何帮助表示赞赏:) 提前谢谢
Dim connection3 As New SqlClient.SqlConnection
Dim command3 As New SqlClient.SqlCommand
Dim adaptor3 As New SqlClient.SqlDataAdapter
Dim dataset3 As New DataSet
connection3.ConnectionString = ("Data Source=(LocalDB)\v11.0;AttachDbFilename=" + My.Settings.strTextbox + ";Integrated Security=True;Connect Timeout=30")
command3.CommandText = "SELECT ID,Type FROM Medical WHERE FileNo='" & TextBox2.Text & "';"
connection3.Open()
command3.Connection = connection3
adaptor3.SelectCommand = command3
adaptor3.Fill(dataset3, "0")
Dim count9 As Integer = dataset3.Tables(0).Rows.Count - 1
If count9 > 0 Then
For countz = 0 To count9
Dim A2 As String = dataset3.Tables("0").Rows(countz).Item("Type").ToString
Dim B2 As Integer = dataset3.Tables("0").Rows(countz).Item("ID")
TextBox3.Text = A2
If A2 = CheckBox1.Text Then
Dim sql4 As String = "update Medical set MNotes=N'" & TextBox22.Text & "' where FileNo='" & TextBox2.Text & "' and Type = '" & CheckBox1.Text & "' and ID='" & B2 & "';"
Dim cmd4 As New SqlCommand(sql4, connection3)
Try
cmd4.ExecuteNonQuery()
Catch ex As Exception
MsgBox(ex.Message)
End Try
ElseIf A2 = CheckBox2.Text Then
Dim sql4 As String = "update Medical set MNotes=N'" & TextBox15.Text & "' where FileNo='" & TextBox2.Text & "' and Type = '" & CheckBox2.Text & "' and ID='" & B2 & "';"
Dim cmd4 As New SqlCommand(sql4, connection3)
Try
cmd4.ExecuteNonQuery()
Catch ex As Exception
MsgBox(ex.Message)
End Try
End If
Next
Else
If CheckBox1.Checked = True Then
Dim sql4 As String = "insert into Medical values('" & CheckBox1.Text & "',N'" & TextBox22.Text & "','" & TextBox2.Text & "')"
Dim cmd4 As New SqlCommand(sql4, connection3)
Try
cmd4.ExecuteNonQuery()
Catch ex As Exception
MsgBox(ex.Message)
End Try
End If
If CheckBox2.Checked = True Then
Dim sql4 As String = "insert into Medical values('" & CheckBox2.Text & "',N'" & TextBox15.Text & "','" & TextBox2.Text & "')"
Dim cmd4 As New SqlCommand(sql4, connection3)
Try
cmd4.ExecuteNonQuery()
Catch ex As Exception
MsgBox(ex.Message)
End Try
End If
End If
答案 0 :(得分:1)
我认为你的一个问题可能与你将表行数减少1然后在0以上测试有关:
Dim count9 As Integer = dataset3.Tables(0).Rows.Count - 1
If count9 > 0 Then
尝试更改为:
Dim count9 As Integer = dataset3.Tables(0).Rows.Count
If count9 > 0 Then
另外,请确保勾选了代码中稍后提到的其中一个复选框(CheckBox1
或CheckBox2
)。
- 编辑 -
对不起 - 没解释原因!原因是.NET中的大多数数组/列表结构都是基于零的(即从0开始计数而不是1)。
答案 1 :(得分:0)
最适合您的行动是通过允许SQL尽其所能来最大限度地提高您的工作效率。假设您使用的是SQL Server 2008,MERGE函数是您提供的条件的绝佳用例。
这是一个基于您的一些代码设计的非常基本的示例:
CREATE PROCEDURE [dbo].[csp_Medical_Merge]
@MType int, @FileNo varchar(20), @MNotes varchar(max), @ID int, @OtherParams
AS
BEGIN
MERGE INTO [DatabaseName].dbo.Medical AS DEST
USING
(
/*
Only deal with data that has changed. If nothing has changed,
then move on.
*/
SELECt @MType, @MNotes, @FileNo, @ID, @OtherParams
EXCEPT
Select [Type], MNotes, FileNo, ID, OtherFields from [DatabaseName].dbo.Medical
) As SRC ON SRC.ID = DEST.ID
WHEN MATCHED THEN
UPDATE SET
DEST.MNOTES = SRC.MNOTES,
DEST.FileNo = SRC.FileNo,
DEST.Type = SRC.Type
WHEN NOT MATCHED BY TARGET THEN
INSERT (FieldsList)
VALUEs (FileNo, MNotes, etc, etc);
END
GO