ExecuteScalar() 返回 0 值

Question

我搜索了这个标题，但没有找到有用的东西。

看看我的代码：

string q = "exec searchUser {0}";
q = string.Format(q, id);

SqlCommand cm2 = new SqlCommand();
cm2.Connection = sqlCon;
cm2.CommandText = q;

SqlDataAdapter sqldadapter1 = new SqlDataAdapter(cm2);

DataTable dataTabel1 = new DataTable();
sqldadapter1.Fill(dataTabel1);

if (sqlCon.State != ConnectionState.Open)
{
    sqlCon.Open();
}

cm2.ExecuteNonQuery();

if (sqlCon.State != ConnectionState.Closed)
{
    sqlCon.Close();
}

string uname = dataTabel1.Rows[0][1].ToString();
string logName = dataTabel1.Rows[0][2].ToString();
//DateTime.Now;
int countTrue = listBox_checked.Items.Count;
int countFalse = listBox_LogicFault.Items.Count;

MessageBox.Show(countTrue+"");
MessageBox.Show(countFalse+"");
MessageBox.Show(DateTime.Now.ToString());

DateTime time = DateTime.Now;
//string format = "yyyy-MM-dd HH:mm:ss";

string query_insertReport = "exec insertReport {0},{1},{2},'{3}',{4}, {5},'{6}'";            
query_insertReport = string.Format(query_insertReport, id, uname, logName, time, countFalse, countTrue, sendFilename.filename);

SqlCommand cmdInsertReport = new SqlCommand();
cmdInsertReport.Connection = sqlCon;
cmdInsertReport.CommandText = query_insertReport;

if(sqlCon.State != ConnectionState.Open)
{
    sqlCon.Open();
}

int idd = Convert.ToInt32 (cmdInsertReport.ExecuteScalar());
MessageBox.Show(idd+"report ID value");    

if (sqlCon.State != ConnectionState.Closed)
{
    sqlCon.Close();
}

MessageBox.Show("Report Inserted");

我的代码的第二部分有一个问题，我想将报告插入到报告表中，并使用ExecuteScalar() 获取每条记录的报告ID，因为我想将它插入到其他表中。插入已成功完成，但 ExecuteScalar() 返回 0 值（错误值）。我在报告表中有一些记录，数字从 32 开始。有什么问题？

这是我的存储过程：

ALTER PROCEDURE [dbo].[insertReport]
    @userID int,
    @userName nvarchar(50),
    @logicName nvarchar(50),
    @date datetime,
    @faultNumber int,
    @trueNumber int,
    @fileName nvarchar(MAX)
AS
    INSERT INTO Reports ([UserID], [UserName], [LogicName], [Date],[FaultNumber], [TrueNumber], [filename]) 
    VALUES (@userID, @userName, @logicName, @date, @faultNumber, @trueNumber, @fileName)

Answer 1

我知道出了什么问题。问题是 SQl 代码不是 C# 和 ADO.net。我需要添加此行代码。

select CAST (SCOPE_IDENTITY() As int)

在我修改我的程序后，现在 ExecuteScalar() 返回真值。 完整的程序代码：

ALTER procedure [dbo].[insertReport]
@userID int,
@userName nvarchar(50),
@logicName nvarchar(50),
@date datetime,
@faultNumber int,
@trueNumber int,
@fileName nvarchar(MAX)

as

INSERT into Reports ([UserID],[UserName],[LogicName],[Date],[FaultNumber],[TrueNumber],[filename]) values (@userID,@userName,@logicName,@date,@faultNumber,@trueNumber,@fileName)
select CAST (SCOPE_IDENTITY() As int)