您好我正在尝试将一组文本框的值存储到sql数据库中，我已经创建了数据库并编写了sql脚本。当脚本运行时，我已经从我的项目创建了与sql数据库的连接，我得到了错误
＆gt; PLUPROG.exe中发生未处理的“System.NotImplementedException”类型异常
其他信息：未实施方法或操作。
引起了人们的注意。
public static implicit operator SqlCommand(Sqlcommand v)
{
throw new NotImplementedException();
}
我的SQL脚本的代码是
private void btnAddPlu_Click(object sender, EventArgs e)
{
using (SqlConnection sqlConn = new SqlConnection("Data Source = (localdb)\\MSSQLLocalDB; Initial Catalog = PluProg; Integrated Security = True"))
{
string query = "INSERT INTO Departments VALUES (@Name, @Type, @SubDept)";
SqlCommand cmd = new Sqlcommand(query, sqlConn);
cmd.Parameters.Add("@name", SqlDbType.NVarChar, 50).Value = cbDeptName.Text;
cmd.Parameters.Add("@Type", SqlDbType.NVarChar, 50).Value = cbDeptType.Text;
cmd.Parameters.Add("@SubDept", SqlDbType.NVarChar, 50).Value = cbSubDept.Text;
cmd.Connection.Open();
try
{
cmd.ExecuteNonQuery();
}
catch ()
答案 0 :(得分：-1)
我真的不知道你在问什么，但我感觉很糟糕，你已经问了两次，显然没有想到任何事情。看看这个，看看有什么能回答你的问题。以下内容未经优化/概括 - 只是基本的东西，您可以通过自己的方式了解什么是什么并改进。
public SqlConnection getConn()
{
return new SqlConnection(getConnString());
}
public string getConnString()
{
return @"Data Source=lily.arvixe.com;Initial Catalog=WM_Crawler;Persist Security Info=True;User ID={myUser};Password={MyPass};Connection Timeout=7000";
}
//This is how you flush a DataTable
public void saveDataTable(string tableName, DataTable table)
{
using (SqlConnection conn = getConn())
{
conn.Open();
using (var bulkCopy = new SqlBulkCopy(conn))//, SqlBulkCopyOptions.KeepIdentity))
{
// my DataTable column names match my SQL Column names, so I simply made this loop. However if your column names don't match, just pass in which datatable name matches the SQL column name in Column Mappings
foreach (DataColumn col in table.Columns)
{
bulkCopy.ColumnMappings.Add(col.ColumnName, "["+col.ColumnName+"]");
}
bulkCopy.BulkCopyTimeout = 8000;
bulkCopy.DestinationTableName = tableName;
bulkCopy.BatchSize = 10000;
bulkCopy.EnableStreaming = true;
//bulkCopy.SqlRowsCopied += BulkCopy_SqlRowsCopied;
//bulkCopy.NotifyAfter = 10000;
bulkCopy.WriteToServer(table);
}
conn.Close();
}
}
//this is how you select one field from one row
public object scalar(string sql)
{
object ret;
using (SqlConnection conn = getConn())
{
conn.Open();
using (SqlCommand com = conn.CreateCommand())
{
com.CommandText = sql;
ret = com.ExecuteScalar();
}
conn.Close();
}
return ret;
}
//this is how you execute a command using SQL string (admin functions)
public void nonQuery(string sql)
{
using(SqlConnection conn = getConn())
{
conn.Open();
using(SqlCommand com = conn.CreateCommand())
{
com.CommandText = sql;
com.CommandTimeout = 5900;
com.ExecuteNonQuery();
}
conn.Close();
}
}
// This is how you execute a query using a predefined, parameterized command (user input)
public void nonQuery_With_Command(SqlCommand com)
{
using (SqlConnection conn = getConn())
{
conn.Open();
using (com)
{
com.Connection = conn;
com.ExecuteNonQuery();
}
conn.Close();
}
}
//this is how you execute several commands under one connection (sql or stored procedure)
public void nonQuery_List_Command(List<SqlCommand> comList)
{
using (SqlConnection conn = getConn())
{
conn.Open();
foreach (SqlCommand com in comList)
{
using (com)
{
com.Connection = conn;
try
{
com.ExecuteNonQuery();
}
catch(Exception n1)
{
Console.WriteLine(n1.Message);
Console.WriteLine(com.Parameters[1].Value.ToString());
}
}
}
conn.Close();
}
}
//This returns column names from a specific table (example of a datareader)
private List<string> get_Column_Names(string tableName)
{
List<string> ret = new List<string>();
using (SqlConnection conn = getConn())
{
conn.Open();
using(SqlCommand com = conn.CreateCommand())
{
com.CommandText = "select column_Name from INFORMATION_SCHEMA.COLUMNS where table_Name = '" + tableName + "'";
com.CommandTimeout = 600;
SqlDataReader read = com.ExecuteReader();
while (read.Read())
{
ret.Add(Convert.ToString(read[0]));
}
}
conn.Close();
}
return ret;
}
//This converts a reader to a class using fields. It is not optimized and is inefficient, but allows you to see what's happening. Yu can optimize it yourself
public static object[] sql_Reader_To_Type(Type t, SqlDataReader r)
{
List<object> ret = new List<object>();
while (r.Read())
{
FieldInfo[] f = t.GetFields();
object o = Activator.CreateInstance(t);
for (int i = 0; i < f.Length; i++)
{
string thisType = f[i].FieldType.ToString();
switch (thisType)
{
case "System.String":
f[i].SetValue(o, Convert.ToString(r[f[i].Name]));
break;
case "System.Int16":
f[i].SetValue(o, Convert.ToInt16(r[f[i].Name]));
break;
case "System.Int32":
f[i].SetValue(o, Convert.ToInt32(r[f[i].Name]));
break;
case "System.Int64":
f[i].SetValue(o, Convert.ToInt64(r[f[i].Name]));
break;
case "System.Double":
double th;
if (r[f[i].Name].GetType() == typeof(DBNull))
{
th = 0;
}
else
{
th = Convert.ToDouble(r[f[i].Name]);
}
}
try { f[i].SetValue(o, th); }
catch (Exception e1)
{
throw new Exception("can't convert " + f[i].Name + " to double - value =" + th);
}
break;
case "System.Boolean":
f[i].SetValue(o, Convert.ToInt32(r[f[i].Name]) == 1 ? true : false);
break;
case "System.DateTime":
f[i].SetValue(o, Convert.ToDateTime(r[f[i].Name]));
break;
default:
throw new Exception("Missed data type in sql select ");
}
}
ret.Add(o);
}
return ret.ToArray();
}
//these are basic (rudimentary) ways of converting class to DataTable
public static DataTable create_DataTable_From_Generic_Class(Type t)
{
DataTable d = new DataTable();
PropertyInfo[] pI = t.GetProperties();
for (int i = 0; i < pI.Length; i++)
{
DataColumn dC = new DataColumn(pI[i].Name, pI[i].PropertyType);
d.Columns.Add(dC);
}
return d;
}
public static object[] Create_Datatable_Row_From_Generic_Class(Type t, object instance, DataTable dt)
{
PropertyInfo[] p = t.GetProperties();
object[] ret = new object[dt.Columns.Count];
for (int i = 0; i < dt.Columns.Count; i++)
{
var temp = t.GetProperty(dt.Columns[i].ColumnName);
ret[i] = temp.GetValue(instance);
}
return ret;
}