如何使用 VB.NET 从数据库中统计记录？
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/34209007/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
How to count records from database using VB.NET ?
提问by Emi
I have the code below:
我有下面的代码：
Dim ds As New DataSet
Dim sda As System.Data.SqlClient.SqlDataAdapter
Dim sSQL As String
Dim strCon As String
sSQL = " .... MY QUERY HERE .... "
strCon = appBase.dbConnString
sda = New System.Data.SqlClient.SqlDataAdapter(sSQL, strCon)
sda.Fill(ds, "MY TABLE FROM DB")
dgRecordsContent.DataSource = ds.Tables("MY TABLE FROM DB")
dgRecordsContent.DataBind()
dgRecordsContent.Visible = True
dbConn.Close()
How can I programatically count the number of rows from the datagrid that I'm showing the values in?
如何以编程方式计算数据网格中显示值的行数？
采纳答案by PHeiberg
Provided that the DataTablebeing filled doesn't already contain any rows, you can get the count using:
假设DataTable被填充的内容不包含任何行，您可以使用以下方法获取计数：
int count = sda.Fill(ds, "MY TABLE FROM DB")
Otherwise you can access the rows in the DataTableusing:
否则，您可以访问使用中的行DataTable：
int count = ds.Tables("MY TABLE FROM DB").Rows.Count
回答by PHeiberg
Dim ds As New DataSet
Dim sda As System.Data.SqlClient.SqlDataAdapter
Dim sSQL As String
Dim strCon As String
sSQL = " .... MY QUERY HERE .... "
strCon = appBase.dbConnString
sda = New System.Data.SqlClient.SqlDataAdapter(sSQL, strCon)
Dim num_rows=sda.Fill(ds, "MY TABLE FROM DB")
MessageBox.Show(num_rows.ToString())
dgRecordsContent.DataSource = ds.Tables("MY TABLE FROM DB")
dgRecordsContent.DataBind()
dgRecordsContent.Visible = True
dbConn.Close()
Please Check This Edit @Emi
请检查此编辑@Emi
回答by PHeiberg
you can use ds.Tables[0].Rows.Count
您可以使用 ds.Tables[0].Rows.Count
