我有以下代码:
Using cmd As SqlCommand = Connection.CreateCommand
cmd.CommandText = "UPDATE someTable SET Value = @Value"
cmd.CommandText &= " WHERE Id = @Id"
cmd.Parameters.AddWithValue("@Id", 1234)
cmd.Parameters.AddWithValue("@Value", "myValue")
cmd.ExecuteNonQuery
End Using
我想知道是否有任何方法来获得最终的SQL语句作为字符串,它应该看起来像这样:
UPDATE someTable SET Value = "myValue" WHERE Id = 1234
如果有人想知道我为什么要这么做
用于记录(失败的)语句
可以将其复制粘贴到企业管理器中进行测试
虽然不完美,这里有一些我为TSQL做的东西-可以很容易地调整为其他口味…如果没有其他的话,它将为你自己的改进提供一个起点:)
这在数据类型和输出参数等方面做得很好,类似于在SSMS中使用“执行存储过程”。我们主要使用sp,所以“text”命令不考虑参数等
public static String ParameterValueForSQL(this SqlParameter sp)
{
String retval = "";
switch (sp.SqlDbType)
{
case SqlDbType.Char:
case SqlDbType.NChar:
case SqlDbType.NText:
case SqlDbType.NVarChar:
case SqlDbType.Text:
case SqlDbType.Time:
case SqlDbType.VarChar:
case SqlDbType.Xml:
case SqlDbType.Date:
case SqlDbType.DateTime:
case SqlDbType.DateTime2:
case SqlDbType.DateTimeOffset:
retval = "'" + sp.Value.ToString().Replace("'", "''") + "'";
break;
case SqlDbType.Bit:
retval = (sp.Value.ToBooleanOrDefault(false)) ? "1" : "0";
break;
default:
retval = sp.Value.ToString().Replace("'", "''");
break;
}
return retval;
}
public static String CommandAsSql(this SqlCommand sc)
{
StringBuilder sql = new StringBuilder();
Boolean FirstParam = true;
sql.AppendLine("use " + sc.Connection.Database + ";");
switch (sc.CommandType)
{
case CommandType.StoredProcedure:
sql.AppendLine("declare @return_value int;");
foreach (SqlParameter sp in sc.Parameters)
{
if ((sp.Direction == ParameterDirection.InputOutput) || (sp.Direction == ParameterDirection.Output))
{
sql.Append("declare " + sp.ParameterName + "\t" + sp.SqlDbType.ToString() + "\t= ");
sql.AppendLine(((sp.Direction == ParameterDirection.Output) ? "null" : sp.ParameterValueForSQL()) + ";");
}
}
sql.AppendLine("exec [" + sc.CommandText + "]");
foreach (SqlParameter sp in sc.Parameters)
{
if (sp.Direction != ParameterDirection.ReturnValue)
{
sql.Append((FirstParam) ? "\t" : "\t, ");
if (FirstParam) FirstParam = false;
if (sp.Direction == ParameterDirection.Input)
sql.AppendLine(sp.ParameterName + " = " + sp.ParameterValueForSQL());
else
sql.AppendLine(sp.ParameterName + " = " + sp.ParameterName + " output");
}
}
sql.AppendLine(";");
sql.AppendLine("select 'Return Value' = convert(varchar, @return_value);");
foreach (SqlParameter sp in sc.Parameters)
{
if ((sp.Direction == ParameterDirection.InputOutput) || (sp.Direction == ParameterDirection.Output))
{
sql.AppendLine("select '" + sp.ParameterName + "' = convert(varchar, " + sp.ParameterName + ");");
}
}
break;
case CommandType.Text:
sql.AppendLine(sc.CommandText);
break;
}
return sql.ToString();
}
这将产生沿着这些线的输出…
use dbMyDatabase;
declare @return_value int;
declare @OutTotalRows BigInt = null;
exec [spMyStoredProc]
@InEmployeeID = 1000686
, @InPageSize = 20
, @InPage = 1
, @OutTotalRows = @OutTotalRows output
;
select 'Return Value' = convert(varchar, @return_value);
select '@OutTotalRows' = convert(varchar, @OutTotalRows);
这个方法现在对我很有效。也许它对某人有用。请原谅所有的冗余。
Public Shared Function SqlString(ByVal cmd As SqlCommand) As String
Dim sbRetVal As New System.Text.StringBuilder()
For Each item As SqlParameter In cmd.Parameters
Select Case item.DbType
Case DbType.String
sbRetVal.AppendFormat("DECLARE {0} AS VARCHAR(255)", item.ParameterName)
sbRetVal.AppendLine()
sbRetVal.AppendFormat("SET {0} = '{1}'", item.ParameterName, item.Value)
sbRetVal.AppendLine()
Case DbType.DateTime
sbRetVal.AppendFormat("DECLARE {0} AS DATETIME", item.ParameterName)
sbRetVal.AppendLine()
sbRetVal.AppendFormat("SET {0} = '{1}'", item.ParameterName, item.Value)
sbRetVal.AppendLine()
Case DbType.Guid
sbRetVal.AppendFormat("DECLARE {0} AS UNIQUEIDENTIFIER", item.ParameterName)
sbRetVal.AppendLine()
sbRetVal.AppendFormat("SET {0} = '{1}'", item.ParameterName, item.Value)
sbRetVal.AppendLine()
Case DbType.Int32
sbRetVal.AppendFormat("DECLARE {0} AS int", item.ParameterName)
sbRetVal.AppendLine()
sbRetVal.AppendFormat("SET {0} = {1}", item.ParameterName, item.Value)
sbRetVal.AppendLine()
Case Else
Stop
End Select
Next
sbRetVal.AppendLine("")
sbRetVal.AppendLine(cmd.CommandText)
Return sbRetVal.ToString()
End Function
这是我用来将存储过程的参数列表输出到调试控制台的:
string query = (from SqlParameter p in sqlCmd.Parameters where p != null where p.Value != null select string.Format("Param: {0} = {1}, ", p.ParameterName, p.Value.ToString())).Aggregate(sqlCmd.CommandText, (current, parameter) => current + parameter);
Debug.WriteLine(query);
这将生成一个类似于下面的控制台输出:
Customer.prGetCustomerDetails: @Offset = 1, Param: @Fetch = 10, Param: @CategoryLevel1ID = 3, Param: @VehicleLineID = 9, Param: @SalesCode1 = bce,
我把这段代码直接放在我希望调试的任何过程的下面,它类似于sql分析器会话,但使用c#。