C# 存储过程不更新数据
我试图将数据表传递给存储过程。该表有四列,C# 存储过程不更新数据,c#,sql,sql-server,stored-procedures,C#,Sql,Sql Server,Stored Procedures,我试图将数据表传递给存储过程。该表有四列,oldDemobility,OldIndex,newDemobility和NewIndex。它被传递到一个存储过程,该存储过程应该更新拼图表中的所有行,并使用旧索引和难度将行更改为新索引和难度。“拼图”表格没有改变,我也不知道为什么。我不确定问题是在代码中还是在数据库查询中 下面是调用存储过程的C代码: var Form = context.Request.Form; DataTable table = new DataTable(); ta
oldDemobility
,OldIndex
,newDemobility
和NewIndex
。它被传递到一个存储过程,该存储过程应该更新拼图表中的所有行,并使用旧索引和难度将行更改为新索引和难度。“拼图”
表格没有改变,我也不知道为什么。我不确定问题是在代码中还是在数据库查询中
下面是调用存储过程的C代码:
var Form = context.Request.Form;
DataTable table = new DataTable();
table.Columns.Add("OldDifficulty");
table.Columns.Add("OldIndex");
table.Columns.Add("NewDifficulty");
table.Columns.Add("NewIndex");
foreach (var key in Form.Keys)
{
var Old = key.ToString().Split('_');
var New = Form[key.ToString()].Split('_');
if (Old == New || New.Length == 1 || Old.Length == 1) continue;
table.Rows.Add(Old[0], int.Parse(Old[1]), New[0], int.Parse(New[1]));
}
using (var con = new SqlConnection(SqlHelper.ConnectionString))
{
con.Open();
using (var com = new SqlCommand("RearrangePuzzles", con))
{
com.CommandType = CommandType.StoredProcedure;
com.Parameters.Add(new SqlParameter("ChangedPuzzles", table)
{ SqlDbType = SqlDbType.Structured });
com.ExecuteNonQuery();
}
con.Close();
}
ALTER PROCEDURE [dbo].[RearrangePuzzles]
@ChangedPuzzles ChangedPuzzlesTable READONLY
AS
UPDATE p
SET
NthPuzzle = cp.NewIndex,
Difficulty = cp.NewDifficulty
FROM
Puzzles p JOIN
@ChangedPuzzles cp ON cp.OldIndex = p.NthPuzzle AND cp.OldDifficulty = p.Difficulty
下面是存储过程:
var Form = context.Request.Form;
DataTable table = new DataTable();
table.Columns.Add("OldDifficulty");
table.Columns.Add("OldIndex");
table.Columns.Add("NewDifficulty");
table.Columns.Add("NewIndex");
foreach (var key in Form.Keys)
{
var Old = key.ToString().Split('_');
var New = Form[key.ToString()].Split('_');
if (Old == New || New.Length == 1 || Old.Length == 1) continue;
table.Rows.Add(Old[0], int.Parse(Old[1]), New[0], int.Parse(New[1]));
}
using (var con = new SqlConnection(SqlHelper.ConnectionString))
{
con.Open();
using (var com = new SqlCommand("RearrangePuzzles", con))
{
com.CommandType = CommandType.StoredProcedure;
com.Parameters.Add(new SqlParameter("ChangedPuzzles", table)
{ SqlDbType = SqlDbType.Structured });
com.ExecuteNonQuery();
}
con.Close();
}
ALTER PROCEDURE [dbo].[RearrangePuzzles]
@ChangedPuzzles ChangedPuzzlesTable READONLY
AS
UPDATE p
SET
NthPuzzle = cp.NewIndex,
Difficulty = cp.NewDifficulty
FROM
Puzzles p JOIN
@ChangedPuzzles cp ON cp.OldIndex = p.NthPuzzle AND cp.OldDifficulty = p.Difficulty
你知道为什么表没有更新吗?我的SQL有问题吗?检查表类型ChangedPuzzlesTable中字段的顺序,它必须与datatable相同。顺序上的任何更改都可能导致此问题
通过添加try-catch检查错误
try
{
using (var con = new SqlConnection(SqlHelper.ConnectionString))
{
con.Open();
using (var com = new SqlCommand("RearrangePuzzles", con))
{
com.CommandType = CommandType.StoredProcedure;
com.Parameters.Add(new SqlParameter("ChangedPuzzles", table)
{ SqlDbType = SqlDbType.Structured });
com.ExecuteNonQuery();
}
con.Close();
}
}
catch (Exception ex)
{
// ex will show you the error
}
看起来一切正常,除了:
com.Parameters.Add(new SqlParameter("ChangedPuzzles", table)
{ SqlDbType = SqlDbType.Structured });
我想改为:
com.Parameters.Add(new SqlParameter("@ChangedPuzzles", table)
{ SqlDbType = SqlDbType.Structured });
@
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使用SQL Server Profiler查看是否实际执行了此查询。您的SQL Server版本是什么?com.Parameters.Add(new-SqlParameter(“ChangedPuzzles”,table)=>com.Parameters.Add(new-SqlParameter(“@ChangedPuzzles”,table)),也可能是这样,但在下结论之前知道确切的错误会有所帮助。