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POASP.NET Populate a dropdownlist based on the changed event in another dropdown
 

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  1. POASP.NET Populate a dropdownlist based on the changed event in another dropdown
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    <p>I want to populate the dropdownlist ddVerantwortlich1 with the people with the proper credentials based on the selected process step ddProzessschritt1</p> <p>It doesn't work if I want to change it using datasource and databind i have to manually loop through the table in the dataset returned from the query. then it works. but not otherwise...</p> <p>What's the problem? Here my code:</p> <pre><code>Protected Sub ddProzessschritt1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles ddProzessschritt1.SelectedIndexChanged 'StefanSteiger.Debug.MsgBox("index changed!") Dim dsProcessResponsibleDataSet As Data.DataSet = New DataSet Dim strSQL As String = "SELECT BE_ID, (BE_Name + ' ' +BE_Vorname) as UserName FROM T_Benutzer WHERE BE_ID IN " strSQL += "(SELECT BEBG_BE FROM T_Benutzer_Benutzergruppen WHERE BEBG_BG IN " strSQL += "(SELECT ZO_BG_ID FROM T_DMS_ZO_Prozesse_Berechtigungen WHERE ZO_PROC_UID = '" + ddProzessschritt1.SelectedValue.ToString + "')) ORDER BY UserName" If StefanSteiger.DBcmds.GetDataSet(strSQL, dsProcessResponsibleDataSet) &gt; 0 Then Me.ddVerantwortlich1.Items.Clear() For Each row As Data.DataRow In dsProcessResponsibleDataSet.Tables(0).Rows 'StefanSteiger.Debug.MsgBox(row("UserName").ToString + " ¦ " + row("BE_ID").ToString) ddVerantwortlich1.Items.Add(New ListItem(row("UserName"), row("BE_ID"))) Next 'Me.ddVerantwortlich1.Dispose() 'Me.ddProzessschritt1.DataSource = dsProcessResponsibleDataSet.Tables(0) 'Me.ddVerantwortlich1.DataTextField = "UserName" 'Me.ddVerantwortlich1.DataValueField = "BE_ID" 'Me.ddVerantwortlich1.DataBind() Else 'Me.ddProzessschritt1.Dispose() ddVerantwortlich1.Items.Add(New ListItem("Niemand verantwortlich.", Nothing)) End If End Sub </code></pre>
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USJeremy Stein
    1. USStefan Steiger
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
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      1. PTAnswer
    1. This table or related slice is empty.
    1. COAt first glance I don't see the problem. Can you elaborate on the unwanted behavior you are experiencing? What do you see when debugging (is the data set populated? is the code block that populates the DDL executed?).
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      1. POASP.NET Populate a dropdownlist based on the changed event in another dropdown
      1. USMayo
    2. COIs this a web app (ASP.NET) or a desktop app (WinForms)? Postbacks and loasing state may be your problems if it's a web app.
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      1. POASP.NET Populate a dropdownlist based on the changed event in another dropdown
      1. USDavid
 

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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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