如何解决获取异常为没有为一个或多个必需参数提供值
我遇到异常,因为一个或多个必需参数未给出值。 如果我使用colsToBeSelected =“ *”(现在进行评论),它可以正常工作,但是使用当前代码,我会报错。
using (var cmd = _oleDbConnection.CreateCommand())
{
cmd.UpdatedRowSource = UpdateRowSource.Both;
var sheets = _oleDbConnection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables,new object[] { null,null,"TABLE" });
var entityName = typeof(TEntity).Name.ToLower();
string colsToBeSelected = "";
if (entityName.IndexOf("alternate_credit_card") > -1)
colsToBeSelected = isHeaderRowExists ? "[CardRefID],[Key],[MIS_Field1],[MIS_Field2],[ValidatingCarrier],[OtherCarriers],[Card Vendor],[Card],[Expiration],[Precedence],[AlertEmail],[maxTktAmt],[IRP_remark] "
: "[F1] AS [CardRefID],[F2] AS [Key],[F3] AS [MIS_Field1],[F4] AS [MIS_Field2],[F5] AS [ValidatingCarrier],[F6] AS [OtherCarriers],[F7] AS [Card Vendor],[F8] AS [Card],[F9] AS [Expiration],[F10] AS [Precedence],[F11] AS [AlertEmail],[F12] AS [maxTktAmt],[F13] AS [IRP_remark] ";
//colsToBeSelected = "* ";
else
colsToBeSelected = isHeaderRowExists ? "[Value]" : "[F1] AS [VALUE]";
var sqlQuery = "SELECT " + colsToBeSelected + "FROM[" + sheets.Rows[0]["TABLE_NAME"].ToString() + "] ";
cmd.CommandText = sqlQuery;
using (var adapter = new OleDbDataAdapter(cmd))
{
excelDs = new DataSet();
adapter.Fill(excelDs);
}
}
}
}
catch (Exception ex)
{
throw ex;
}
错误的屏幕截图 Error
文件的标题栏如下
版权声明:本文内容由互联网用户自发贡献,该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务,不拥有所有权,不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容, 请发送邮件至 dio@foxmail.com 举报,一经查实,本站将立刻删除。