从sql server生成年龄。 VB.NET

Question

你能告诉我如何从0-5开始从sql server获取年龄等等，并在文本框或标签中输入总数吗？请点击链接查看样品 Generate Ages

谢谢你！

Answer 1

你的意思是

Dim sql As String = "SELECT age_column FROM your_table WHERE age_column BETWEEN '0' AND '5'"
'The above line selects the all records where age is between 0-5 (Change the variables)

Dim da As New OleDbDataAdapter(sql, connectionstring)
Dim ds As New DataSet
Dim dt as new DataTable

da.Fill(ds)
dt = ds.Tables(0).Copy()

' Above code stores the results in an iterable table

Dim i As Integer = 0

For Each dr as DataRow in dt.Rows
i = i + 1
Next

TextBox1.Text = i

 'i will be the total number of records where age is between 0-5, and display it in a `TextBox`

然而，你的问题非常糟糕，通常人们不会花太多精力去回答它，因为你已经不费力了。