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string.Concat 返回 string.Empty

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This commit is contained in:
敬洪波 2021-06-11 11:22:45 +08:00
parent 0c7c073e82
commit 50ba957e27
1 changed files with 17 additions and 4 deletions
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15
Providers/FreeSql.Provider.Dameng/DamengUtils.cs
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@ -30,7 +30,14 @@ namespace FreeSql.Dameng
case DmDbType.Char: case DmDbType.Char:
case DmDbType.VarChar: case DmDbType.VarChar:
case DmDbType.Text: case DmDbType.Text:
if (value == null)
{
value = (string)null;
}
else
{
value = string.Concat(value); value = string.Concat(value);
}
break; break;
} }
var ret = new DmParameter { ParameterName = QuoteParamterName(parameterName), DmSqlType = dbtype, Value = value }; var ret = new DmParameter { ParameterName = QuoteParamterName(parameterName), DmSqlType = dbtype, Value = value };
@ -56,8 +63,14 @@ namespace FreeSql.Dameng
case DmDbType.Char: case DmDbType.Char:
case DmDbType.VarChar: case DmDbType.VarChar:
case DmDbType.Text: case DmDbType.Text:
if(value != null) if (value == null)
{
value = (string)null;
}
else
{
value = string.Concat(value); value = string.Concat(value);
}
break; break;
} }
} }