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Old January 12th, 2011, 02:37 AM
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Default join two table with gridview


i have web page that save data for stores. These stores have activities, i want to determine the activities for those stores using gridview and dropdownlist. so i make three tables:
- first one is tbOLActivity table:
has fields:
ActivityId int (pk), ActivityName nvarchar(50)
- second one is tbOLStore table:
has fields:
StoreId int (pk), StoreName nvarchar(50), ActivityId int (fk), Address navrchar(50)
-therd one is tbOLStoreActivty table:
has fields :
SerialNo int (pk), StoreId int (fk), ActivityId int (fk), Activity_Status int
i drag dropdownlist in web page called "AcivityCombo" to display the availble activity data
If CtvAct.GetRecords("Fill_ActivityTb") = True Then                 AcivityCombo.DataSource = CtvAct.MainDataset.Tables("tbOLActivity").DefaultView                 AcivityCombo.DataTextField = "ActivityName"                 AcivityCombo.DataValueField = "ActivityId"                 AcivityCombo.DataBind()
and gridview to show the selected activity
the problem is how to select item from this combo and insert it into gridview then save data into the tables
i try this code but it dose not work
Protected Sub AddActivityCnd_Click(ByVal sender As Object, ByVal e As System.Web.UI.ImageClickEventArgs) Handles AddActivityCnd.Click
 Dim sda As New SqlDataAdapter("SELECT dbo.tbOLStoreActivty.StoreId, dbo.tbOLStoreActivty.ActivityId, dbo.tbOLActivity.ActivityName FROM  dbo.tbOLActivity INNER JOIN dbo.tbOLStoreActivty ON dbo.tbOLActivity.ActivityId = dbo.tbOLStoreActivty.ActivityId WHERE tbOLStoreActivty.ActivityId='" & Trim(AcivityCombo.SelectedValue.ToString) & " ' ", con)
        ViewState("ds") = ds
        ActivityGV.DataSource = ds.Tables(0)
 End Sub
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