从数据库中读取并填充DataTable [英] Read from database and fill DataTable

问题描述

我通过 DataReader 获取一组数据并分配给一个字符串.现在我需要用查询字段填充 DataTable 列.DataTable 连接到网格以显示填充的数据.

I'm getting a set of data by a DataReader and assigning to a string. Now I need to fill the DataTable columns with the query fields. The DataTable is connected to a grid to display the filled data.

查询是:

strSQL = "SELECT EmpCode,EmpID,EmpName FROM dbo.Employee

DataTable 列是 EmpCode、EmpID、EmpName.

我需要读取查询并分配给DataTable 的列并填充表格.我试过如下，但我没有得到正确的输出，

I need to read the query and assign to the columns of DataTable and fill the table. I have tried as below but i dont get the proper output,

Me.DtShifts.Tables("NonAllocated").Clear()
Me.DtShifts.Tables("NonAllocated").Load(dr)

推荐答案

Connection 对象仅用于说明.DataAdapter 是关键位:

Connection object is for illustration only. The DataAdapter is the key bit:

Dim strSql As String = "SELECT EmpCode,EmpID,EmpName FROM dbo.Employee"
Dim dtb As New DataTable
Using cnn As New SqlConnection(connectionString)
  cnn.Open()
  Using dad As New SqlDataAdapter(strSql, cnn)
    dad.Fill(dtb)
  End Using
  cnn.Close()
End Using

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