datareader

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Difference between (string)reader[0] and reader[0].ToString()

Is there a difference between DataReader[0].ToString() and (string)D开发者_如何学GoataReader[0]?[详细]

2023-03-05 04:13 分类：问答
No records are added to DataTable in Linq Select from DbCommand.ExecuteReader

This code looks like it should work, in fact it compil开发者_如何学运维es and runs. However, the records from the cmd.ExecuetReader() (and there are records,) are not being added to dt as expected. An[详细]

2023-02-24 22:35 分类：问答
Reading a date using DataReader

I read a string using this format开发者_运维百科 with a data reader. How can I read in a date using similar format?[详细]

2023-02-23 22:14 分类：问答
What is the best approach to bind data to ReportViewer control? (DataAdapter vs DataReader)

I have 2 approaches to bind data to ReportViewer 开发者_如何转开发control. Which one is better? Could you please give me some advice?[详细]

2023-02-22 06:13 分类：问答
Mysql/C# error: There is already an open DataReader associated with this Connection which must be closed first

I have a piece of code to execute a mysqlcommand but sometimes it throws the exception There is already an open DataReader associated with this Connection which must be closed first[详细]

2023-02-20 17:17 分类：问答
DataReader returns no rows -- rows are present in database

Okay world, I\'m having some trouble. No, this is not \'homework\' I\'ve got some code which needs to do two things:[详细]

2023-02-19 22:43 分类：问答
Fetching multiple recordset using Oracledatareader - c# [closed]

This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time,or an extraordinarily narrow situation that is not generally applic[详细]

2023-02-18 00:08 分类：问答
combobox with for each loop

Hi I am a student do开发者_Go百科 anybody know after populating the combobox with the database values. How to display the same value in the text box.When I select a name in the comboboxthe same name s[详细]

2023-02-12 23:43 分类：问答
SqlDataReader problems

开发者_开发百科I have a problem when storing data into a SqlDataReader. When i assing the sdr variable, at the point where connection.close(), the sdr variable becomes empty. Why?[详细]

2023-02-11 05:02 分类：问答
Button can't forward me to next page

Following is the code for the button but when I click the button, it does not forward 开发者_JAVA技巧me to the desired page. Is there something wrong with my DataReader loop?[详细]

2023-02-10 13:18 分类：问答