C# c中的索引超出范围异常#
这是我的数据访问层C# c中的索引超出范围异常#,c#,sql-server,stored-procedures,indexoutofrangeexception,C#,Sql Server,Stored Procedures,Indexoutofrangeexception,这是我的数据访问层 public string GetMinISecPer(ISecuritySummmary iSecObj) { try { string miniSecPer = null; SelectCommand cmd = new SelectCommand(SPConst.GetMinIsecPer); cmd["@Sub
public string GetMinISecPer(ISecuritySummmary iSecObj)
{
try
{
string miniSecPer = null;
SelectCommand cmd = new SelectCommand(SPConst.GetMinIsecPer);
cmd["@SubISUName"] = iSecObj.SubISUName;
using (DBDataReaderWrapper reader = cmd.Execute())
{
while (reader.Read())
{
double miniSecPercent = Convert.ToDouble(reader.String["testValue"]);
miniSecPer = Convert.ToString(miniSecPercent);
}
}
return miniSecPer;
}
catch (Exception e)
{
return "";
}
}
这是我的存储过程
ALTER PROCEDURE [dbo].[GetMinIsecPer]
@SubISUName varchar(max)
AS
BEGIN
DECLARE @MinIsecPer float;
DECLARE @testValue varchar(20);
set @testValue='value';
set @MinIsecPer=(select MIN(iSecComplPer) from ISecurityStatistics IST
left outer join Relationship R on R.Id=IST.RelationshipId
left outer join SubISU SI on SI.Id=R.SubISUId
where SI.SubISUName=@SubISUName and UploadedDate=(SELECT MAX(UploadedDate) FROM ISecurityStatistics))
set @testValue=(select cast(@MinIsecPer as varchar(20)))
select cast(@testValue as varchar(20))
SELECT
SQL_VARIANT_PROPERTY(@testValue, 'BaseType'),
SQL_VARIANT_PROPERTY(@testValue, 'Precision'),
SQL_VARIANT_PROPERTY(@testValue, 'Scale'),
SQL_VARIANT_PROPERTY(@testValue, 'MaxLength')
END
我的SP的输出是
(No column name)
72
(No column name) (No column name) (No column name) (No column name)
varchar 0 0 20
在此SP iam中,从表ISecurityStatistics获取最小百分比,subISU和Relationship是主表,用于获取iam作为参数传递给它的subISUName
但在DataAccessLayer中,iam将错误设置为“索引超出范围异常”
请帮我解决这个问题。。提前感谢。这是因为您试图通过名称访问该值,即使尚未设置名称 使用以下任一选项:
reader[0].ToString()
或者您可以将该列命名为:
select cast(@testValue as varchar(20)) As [testValue]
然后调用当前所做的操作。这是因为您试图通过名称访问该值,即使尚未设置名称 使用以下任一选项:
reader[0].ToString()
或者您可以将该列命名为:
select cast(@testValue as varchar(20)) As [testValue]
然后调用您当前正在执行的操作