在我的项目中,我使用随机数生成器函数生成随机字符并将其存储在数据库中,数字生成正确但在插入数据期间抛出异常“字符串或二进制数据将是截短的”
我的代码:
protected void trigger()
{
try
{
DataSet ds = ExamManagement.SP.table2_SP_Selectall().GetDataSet();
if (ds.Tables[0].Rows.Count > 0)
{
string a = RandomNumberGenerator(4);
string b = RandomNumberGenerator(4);
string c = RandomNumberGenerator(4);
ExamManagement.SP.table1_insert(a,b,c).Execute();
}
}
catch (SqlException ex)
{
ClientMessaging("Error :"+ex);
}
}
public static string RandomNumberGenerator(int length)
{
System.Security.Cryptography.RandomNumberGenerator rng = System.Security.Cryptography.RandomNumberGenerator.Create();
char[] chars = new char[length];
//based on your requirment you can take only alphabets or number
string validChars = "aAbBcCdDeEfFgGhHiIjJkKlLmMnNoOpPqQrRsStTuUvVwWxXzZ";
byte[] bytes = new byte[length-1];
for (int i = 0; i < length; i++)
{
rng.GetBytes(bytes);
Random rnd = new Random(bytes[0]);
chars[i] = validChars[rnd.Next(validChars.Length)];
}
return (new string(chars));
}
我的SQL Server表格结构:
Column1, nvarchar(100),null
Column2, nvarchar(100),null
Column3, nvarchar(100),null
我的改变存储过程是,
Create Procedure Table1_insert
(
@col1 varchar(max),
@col2 varchar(max),
@col3 varchar(max)
)
as
BEGIN
BEGIN TRY
Insert into Table1(Column1,Column2,Column3) values (@col1,@col2,@col3)
END TRY
BEGIN CATCH
IF @@TRANCOUNT > 0
ROLLBACK
DECLARE @ErrMsg nvarchar(4000), @ErrSeverity int
SELECT @ErrMsg = ERROR_MESSAGE(),
@ErrSeverity = ERROR_SEVERITY()
RAISERROR(@ErrMsg, @ErrSeverity, 1)
END CATCH
END
答案 0 :(得分:0)
检查您的存储过程。您可能忘了在参数上指定长度。例如。 @ p1 nvarchar(1000)
答案 1 :(得分:0)
数据库中存在的列变量大小比我发送的可变数据小,因此我得到错误字符串或二进制数据将被截断
我通过增加DB中变量的大小来解决错误