我在 SQL Server 2005 中为员工详细信息创建了一个插入命令的存储过程,其中一个参数是我已用作varbinary
表中数据类型的图像。
但是当我在存储过程中添加该参数时,我收到以下错误-
不允许从数据类型 varchar 到 varbinary 的隐式转换。使用 CONVERT 函数运行此查询。
存储过程:
(
@Employee_ID nvarchar(10)='',
@Password nvarchar(10)='',
@Security_Question nvarchar(50)='',
@Answer nvarchar(50)='',
@First_Name nvarchar(20)='',
@Middle_Name nvarchar(20)='',
@Last_Name nvarchar(20)='',
@Employee_Type nvarchar(15)='',
@Department nvarchar(15)='',
@Photo varbinary(50)=''
)
insert into Registration
(
Employee_ID,
Password,
Security_Question,
Answer,
First_Name,
Middle_Name,
Last_Name,
Employee_Type,
Department,
Photo
)
values
(
@Employee_ID,
@Password,
@Security_Question,
@Answer,
@First_Name,
@Middle_Name,
@Last_Name,
@Employee_Type,
@Department,
@Photo
)
表结构:
Column Name Data Type Allow Nulls
Employee_ID nvarchar(10) Unchecked
Password nvarchar(10) Checked
Security_Question nvarchar(50) Checked
Answer nvarchar(50) Checked
First_Name nvarchar(20) Checked
Middle_Name nvarchar(20) Checked
Last_Name nvarchar(20) Checked
Employee_Type nvarchar(15) Checked
Department nvarchar(15) Checked
Photo varbinary(50) Checked
vb.net中调用存储过程的代码->
公共函数提交(ByVal obj As UserData,ByVal opt As String)作为布尔值
Using cnn As New SqlConnection(conn)
Using cmd As New SqlCommand
cmd.Connection = cnn
If opt = "Submit" Then
cmd.CommandText = "sp_emp_Registration"
End If
cmd.CommandType = CommandType.StoredProcedure
cmd.Parameters.Add(New SqlParameter("@Employee_ID", obj.EmpID))
cmd.Parameters.Add(New SqlParameter("@Password", obj.Pwd))
cmd.Parameters.Add(New SqlParameter("@Security_Question", obj.SecQues))
cmd.Parameters.Add(New SqlParameter("@Answer", obj.Ans))
cmd.Parameters.Add(New SqlParameter("@First_Name", obj.Firstname))
cmd.Parameters.Add(New SqlParameter("@Middle_Name", obj.Middlename))
cmd.Parameters.Add(New SqlParameter("@Last_Name", obj.Lastname))
cmd.Parameters.Add(New SqlParameter("@Employee_Type", obj.EmpType))
cmd.Parameters.Add(New SqlParameter("@Department", obj.dept))
cmd.Parameters.Add(New SqlParameter("@Photo", obj.photo))
cnn.Open()
Try
If (cmd.ExecuteNonQuery() > 0) Then
cnn.Close()
Return True
Else
Return False
End If
Catch ex As Exception
Return False
End Try
End Using
End Using
End Function
我不知道该怎么办..谁能给我一些建议或解决方案?提前致谢。