Question

我相信我的编码有问题。据我所知，这不是按日期过滤的。请帮忙

SQL代码：

SELECT
   CONVERT(char(80), i.InvDate,3) AS InvDate,
   i.InvoiceNo,
   i.EmployerCode,
   i.TaxAmount + i.SubTotal AS Amount,
   '' AS Payment,
   pd.GivenName
FROM
   dbo.Invoice i
INNER JOIN 
   dbo.PatientDetails pd ON (pd.MedicalRecordID = i.MedicalRecordID)

C＃代码：

SqlCommand objCmd = new SqlCommand("SELECT CONVERT(char(80), i.InvDate,3) AS InvDate, 
    i.InvoiceNo,
    i.EmployerCode,
    i.TaxAmount + i.SubTotal AS Amount,
    '' AS Payment,
    pd.GivenName 
FROM
    dbo.Invoice i 
INNER JOIN dbo.PatientDetails pd ON (pd.MedicalRecordID = i.MedicalRecordID) 
WHERE (InvDate >= CONVERT(datetime, '" + dtpFrom.Text + "', 105 )) 
    AND (InvDate <= CONVERT(datetime, '" + dtpTo.Text + "', 105))," , objConn);

这就是我想要实现的目标：

http://i47.tinypic.com/167trt3.png

这就是我得到的：

http://i50.tinypic.com/28m2z5x.png

在我从这里被踢之前。我会做一些修改。

编辑：

DateTime是105格式（dd-mm-yyyy）

WHERE (InvDate >= CONVERT(datetime, '" + dtpFrom.Text + "', 105 )) 
AND (InvDate <= CONVERT(datetime, '" + dtpTo.Text + "', 105))

这应该从特定日期中选择。 EG：2012年10月11日至2012年10月15日。

即使没有DateTimepicker，输出也不会显示“GivenName”

Answer 1

最好的方法是以dd / MMM / yyyy格式格式化输入。它更好地帮助SqlServer识别月和日。我强烈建议您在与SqlServer通信时使用MMM格式。

DateTime fromDate, toDate;
fromDate = DateTime.Parse(dtpFrom.Text);
toDate = DateTime.Parse(dtpTo.Text);

SqlCommand objCmd = new SqlCommand("SELECT CONVERT(char(80), i.InvDate,3) AS InvDate, 
i.InvoiceNo,
i.EmployerCode,
i.TaxAmount + i.SubTotal AS Amount,
'' AS Payment,
pd.GivenName 
FROM    dbo.Invoice i 
INNER JOIN dbo.PatientDetails pd ON (pd.MedicalRecordID = i.MedicalRecordID) 
WHERE datediff(d, '" + fromDate.ToString("dd/MMM/yyyy") + "', i.InvDate) >=0  
AND datediff(d, '" + toDate.ToString("dd/MMM/yyyy") + "', i.InvDate) <=0", objConn);

或者如果你有任何约束要做，如上所述，使用CONVERT（）

转换输入

SqlCommand objCmd = new SqlCommand("SELECT CONVERT(char(80), i.InvDate,3) AS InvDate, 
i.InvoiceNo,
i.EmployerCode,
i.TaxAmount + i.SubTotal AS Amount,
'' AS Payment,
pd.GivenName 
FROM    dbo.Invoice i 
INNER JOIN dbo.PatientDetails pd ON (pd.MedicalRecordID = i.MedicalRecordID) 
WHERE datediff(d, CONVERT(datetime, '" + dtpFrom.Text + "', 105 ), i.InvDate) >=0  
AND datediff(d, CONVERT(datetime, '" + dtpTo.Text + "', 105 ), i.InvDate) <=0", objConn);

Answer 2

问题是由于将日期类型转换为char，过滤可能无法按预期工作。尝试使用datediff，它可以解决问题。

SqlCommand objCmd = new SqlCommand("SELECT CONVERT(char(80), i.InvDate,3) AS InvDate, 
i.InvoiceNo,
i.EmployerCode,
i.TaxAmount + i.SubTotal AS Amount,
'' AS Payment,
pd.GivenName 
FROM    dbo.Invoice i 
INNER JOIN dbo.PatientDetails pd ON (pd.MedicalRecordID = i.MedicalRecordID) 
WHERE datediff(d, '" + dtpFrom.Text + "', i.InvDate) >=0  
AND datediff(d, '" + dtpTo.Text + "', i.InvDate) <=0", objConn);

SQL Server和C＃的输出不同

2 个答案: