SQL Server 和 C# 的输出不同

我相信我的编码有问题。我猜它不是按日期过滤。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# code:

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：

这就是我得到的：

在我被踢出这里之前。我将进行一些编辑。

EDIT:

日期时间采用 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，输出也不显示“GivenName”

最好的方法是将输入格式化为 dd/MMM/yyyy 格式。它更好地帮助Sql Server识别月份和日期。我强烈建议您在与 Sql Server 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，如果您有任何限制，请使用 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);