Web Forms :: Post Form To Other Page?
Sep 23, 2010
I want to be able to post my form data to another page based on the result of a validation done on server (and not via javascript). As an example, let's say the user captures a customer number and then captures the phone number of the customer on page A. When the user clicks on the submit button, the page posts back. Then, in the button click event, I need to check in the database if the customer number exists. If it exists, I need to post the data to page B so that user can input the next information. If it does not, I need to stay on the first page and show an error message telling the user that the customer does not exists.
I do not want to use Response.Redirect cause that would mean that page B would lose the form data coming from page A. I know about crosspage postbacks but that just turn the problem the other way around (if I post directly to page B, how do I get back to page A with the form data and show the error message?)...I know about Server.Transfer too but I would like to avoid that method because I know there are down sides to it too...I tried setting the button target URL to page B after validating from the database but it does not automatically redirect to Page B, it still shows up Page A and then if you click again on the button you are taken to page B. I know I could setup a javascript to automatically call the click on the button to post the page the second time automatically to the Page B but I don't like that method (if the user has slow internet, he sees the page twice and once the user is on page B, he can't use the back button cause he would be automatically redirected back to Page B because of the script).So, is there a way to change the request target after the button's click code has been handled???
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[Code]....
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[Code]....
[Code]....
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[code]...
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[code]...
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<form method="post" action="http://poston.domain.com/" enctype="multipart/form-data"> <input type="hidden" name="function" value="somevalue"> <input type="text" name="username" value="somevalue2"> <input type="text" name="password" value="somevalue3"> <input type="file" name="picture"> <input type="text" name="pictto" value="0"> <input type="submit" value="Send"></form>
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Public function GetResult(ByVal File As Byte)) as stringDim request As HttpWebRequest = CType(WebRequest.Create("http://poston.domain.com), HttpWebRequest)request.Method = "POST"request.KeepAlive = TrueDim boundary As String = "-------------------------" + DateTime.Now.Ticks.ToString("x")Dim header As String = vbCrLf & "--" + boundary + vbCrLfDim footer As String = vbCrLf & "--" + boundary + vbCrLfrequest.ContentType = String.Format("multipart/form-data; boundary={0}", boundary)Dim contents As StringBuilder = New StringBuilder()contents.Append(vbCrLf)contents.Append(header)contents.Append("Content-Disposition: form-data; name=""function""" & vbCrLf)contents.Append(vbCrLf)<br/>contents.Append("functionname1")contents.Append(header)contents.Append("Content-Disposition: form-data; name=""username""" & vbCrLf)contents.Append(vbCrLf)contents.Append(myusername)contents.Append(header)contents.Append("Content-Disposition: form-data; name=""password""" & vbCrLf)contents.Append(vbCrLf)contents.Append(mypassword)contents.Append(header)contents.Append("Content-Disposition: form-data; name=""pictto""" & vbCrLf)contents.Append(vbCrLf)contents.Append("0")contents.Append(header) contents.Append("Content-Disposition: form-data; name=""picture""; filename=""Untitled.jpg""" + vbCrLf)contents.Append("Content-Type: image/jpeg" + vbCrLf)contents.Append(vbCrLf)Dim BodyBytes As Byte() = Encoding.UTF8.GetBytes(contents.ToString())Dim footerBytes As Byte() = Encoding.UTF8.GetBytes(footer)request.ContentLength = BodyBytes.Length + File.Length + footerBytes.LengthDim requestStream As Stream = request.GetRequestStream()requestStream.Write(BodyBytes, 0, BodyBytes.Length)requestStream.Write(File, 0, File.Length)requestStream.Write(footerBytes, 0, footerBytes.Length)requestStream.Flush()requestStream.Close()Dim ret As String = NewStreamReader(request.GetResponse.GetResponseStream).ReadToEndreturn retend function
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Dec 20, 2010
Using .Net framework 4.0I have a .net search application that reads values from regular html webforms submitted via the Post method. So the code to process these forms uses Request.form and looks like
[Code]....
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Apr 19, 2010
See what happens when you answer my questions! I come back! No good deed goes unpunished. I've built an Update form where my visitor can update data in dbase. I have a formview with several dropdown lists; none of which will update the table (all the textboxes, checkboxes and even Ajax enabled calendar work just fine). In the form below, visitor selects a CareerCluster from the ddl. Upon postback, the next ddl (pathwayListBox) populates with related data using the CareerCluster.selectedvalue in a query. At the same time, tsaOrgsDropDownList is also populated based upon the first ddl (CareerCluster).
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<FooterStyle BackColor="#C6C3C6" ForeColor="Black" />
<RowStyle BackColor="#DEDFDE" ForeColor="Black" />
<EditItemTemplate>
<table align="center" width="700" border="1" cellpadding="10" cellspacing="2" bgcolor="White">
<%--A whole bunch of textboxes goes here--%>
<tr>
<td bgcolor="#dadada">
<strong>Number of HS Credits:</strong> <span>(Standards-based districts use the <em>Other</em> form field.)</span>
</td>
<td bgcolor="#FCCCCC">
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<asp:ListItem Selected="True" Value="0">--Choose One--</asp:ListItem>
<asp:ListItem>0.5</asp:ListItem>
<asp:ListItem>1.0</asp:ListItem>
</asp:DropDownList>
</td>
</tr>
<tr>
<td bgcolor="#dadada">
<strong>Career Cluster:</strong>
</td>
<td bgcolor="#FCCCCC">
<span><font color="red">Note: you must reselect Career Cluster from the list.</font></span><br />
<asp:DropDownList ID="careerCluster" runat="server" AutoPostBack="True" TabIndex="4">
<asp:ListItem Selected="True" Value="0">--Choose One--</asp:ListItem>
<asp:ListItem Value="1">Agriculture, Food & Natural Resources</asp:ListItem>
<asp:ListItem Value="2">Architecture & Construction</asp:ListItem>
</asp:DropDownList>
</td>
</tr>
<tr>
<td bgcolor="#dadada">
<strong>Pathways:</strong> <span>(Pathway as defined in the Cluster/Pathway model.)</span>
</td>
<td bgcolor="#FCCCCC">
<span><font color="red">Note: you must reselect Course Pathway from the list or enter Other Pathway in the form field provided.</font></span><br />
<asp:ListBox ID="pathwayListBox" runat="server" DataSourceID="CTECourses" DataTextField="ClusterPathway" DataValueField="ClusterPathway" SelectionMode="Multiple" Style="margin-left: 0px" TabIndex="5" Rows="3">
<asp:ListItem Selected="True" Value="0">--Choose One--</asp:ListItem>
</asp:ListBox>
<asp:SqlDataSource ID="CTECourses" runat="server" ConnectionString="<%$ ConnectionStrings:CareerTechEducationConnectionString %>" SelectCommand="SELECT [ClusterName], [ClusterPathwayID], [ClusterPathway], [ClusterCode] FROM [lkClustersPathways]
WHERE ([ClusterCode] = @ClusterCode)">
<SelectParameters>
<asp:ControlParameter ControlID="careerCluster" Name="ClusterCode" PropertyName="SelectedValue" Type="Int32" />
</SelectParameters>
</asp:SqlDataSource>
</td>
</tr>
<tr>
<td align="center" bgcolor="#4A3C8C" colspan="2">
<asp:Label ID="occupationalStandardsLabel" runat="server" Font-Bold="True" ForeColor="White" Text="Occupational Standards"></asp:Label>
</td>
</tr>
<tr>
<td bgcolor="#dadada">
<strong>Source of Occupational Standards:</strong>
</td>
<td bgcolor="#FCCCCC">
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<asp:ListItem Selected="True">--Choose One--</asp:ListItem>
</asp:DropDownList>
<asp:SqlDataSource ID="SqlDataSource3" runat="server" ConnectionString="<%$ ConnectionStrings:CareerTechEducationConnectionString %>" SelectCommand="SELECT [TSAOrgID], [TSAOrganization] FROM [lkTSAOrgs] WHERE ([TSAClusterID] = @TSAClusterID)">
<SelectParameters>
<asp:ControlParameter ControlID="careerCluster" Name="TSAClusterID" PropertyName="SelectedValue" Type="Int32" />
</SelectParameters>
</asp:SqlDataSource>
</td>
</tr>
<%--A whole bunch of textboxes, checkboxes and other stuff goes here--%>
<tr>
<td bgcolor="#dadada">
<strong>What is the Summative Assessment (Technical Skills Assessment) for this course:?</strong>
</td>
<td bgcolor="#FCCCCC">
<span><font color="red">Note: you must reselect Summative Assessment from the list or enter Other Summative Assessment in the form field provided.</font></span><br />
<asp:DropDownList ID="tsaDropDownList" runat="server" AutoPostBack="false" DataSourceID="TSAs" DataTextField="TSA" DataValueField="TSAID" Width="300">
</asp:DropDownList>
<asp:SqlDataSource ID="TSAs" runat="server" ConnectionString="<%$ ConnectionStrings:CareerTechEducationConnectionString %>" SelectCommand="SELECT [TSAID], [TSA] FROM [lkTSAs] WHERE ([TSAOrgID] = @TSAOrgID)">
<SelectParameters>
<asp:ControlParameter ControlID="tsaOrgsDropDownList" Name="TSAOrgID" PropertyName="SelectedValue" Type="Int32" />
</SelectParameters>
</asp:SqlDataSource>
</td>
</tr>
<%--A whole bunch of textboxes goes here--%>
<tr>
<td align="center" bgcolor="#dadada">
<asp:Button ID="UpdateButton" runat="server" CausesValidation="True" CommandName="Update" Text="Update" />
<br />
<span><font color="maroon">* All fields except the Tech Prep Information are required.</font></span></div>
</td>
<td align="center" bgcolor="#dadada">
<asp:Button ID="UpdateCancelButton" runat="server" CausesValidation="False" CommandName="Cancel" Text="Cancel" />
</td>
</tr>
</tr>
</table>
</EditItemTemplate>
</asp:FormView>
<asp:SqlDataSource ID="formviewSqlDataSource" runat="server" ConnectionString="<%$ ConnectionStrings:CareerTechEducationConnectionString %>" SelectCommand="SELECT * FROM tblCTECourses WHERE (CTECourseID = @CTECourseID)" UpdateCommand="UPDATE tblCTECourses
SET HSCredits = @HSCredits, CareerCluster = @CareerCluster, Pathways = @Pathways, TSAOrgs = @TSAOrgs, TSA = @TSA, LastUpdate = GETDATE() WHERE (CTECourseID = @CTECourseID)">
<SelectParameters>
<asp:SessionParameter Name="CTECourseID" SessionField="CTECourseID" Type="Int32" />
</SelectParameters>
<UpdateParameters>
<asp:FormParameter FormField="numHSCreditsDropDownList" Name="HSCredits" Type="String" />
<asp:FormParameter FormField="HSCreditsOtherTextBox" Name="HSCreditsOther" Type="String" />
<asp:FormParameter FormField="careerCluster" Name="CareerCluster" Type="Int32" />
<asp:FormParameter FormField="pathwayListBox" Name="Pathways" Type="String" />
<asp:FormParameter FormField="tsaOrgsDropDownList" Name="TSAOrgs" Type="Int32" />
<asp:FormParameter FormField="tsaDropDownList" Name="TSA" Type="String" />
<asp:FormParameter FormField="TSAOtherTextBox" Name="TSAOther" Type="String" />
</UpdateParameters>
</asp:SqlDataSource>
In the codebehind I've tried to set selectedvalue to session variable upon selected index changed like this:
Protected Sub numHSCreditsDropDownList_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs)
Session("HSCredit") = DirectCast(courseUpdateFormView.FindControl("numHSCreditsDropDownList"), DropDownList).SelectedValue
End Sub
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Jul 19, 2010
I need to delete all the item what I seleted or I Checked.so I collect all the ID I selected .
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