VB.NET Databinding

Sep 17, 2007

hello...

Probably a simple question but I have to ask...using visual basic 2005 express...



I have two tables one with last name and basic info, one with detailed info. Both set up with Primary key and Foreign key.



I have a combo box that displays the last names and then by clicking
the last name, text boxes fill with the "other" data from table1,

however,

there are some text boxes that I would like to fill with data from the table2.

Any pointers??

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DataBinding

Mar 25, 2008

I’m trying to teach myself C# and trying to create a simple (so I thought) little database using Infragistic's UltraWebGrid (Althought my question is more ASPish). Every sample I run across seems to only show the very basics and doesn’t seem to go into anything more than just a simple table and displaying it in a Gird. Which is pretty easy and I can do that all day and night.
Anyway, my database has three tables in a one-to-many relationship. The database is of Trucking companies and which states they service and they can service multiple states.
The database is like this:
Compnies:
TruckerID, Company Name, Address, etc.
ServiceStates:
TruckerID, StateID
StateNames:
StateID, StateName, StateAbbreviation
I would like to show the States that they service in a Hierarchical Grid.
I can write the SQL to do what I want to, basically do an inner join on ServicesStates and StateNames based on the TruckerID. I can sit all day and night getting what  I would like to display in the WebGrid in the query builder on the SQL server. I figured it wouldn’t be much of a stretch to be able to do that in UltraWebGrid (Or whatever floats your boat).
Anyway, on to my question. :)
While browsing the samples on everything, I've figured out, that I will need to use the SqlDataAdapter Class, to access the database. Then I'll need to use the SQLConnection Class, and populate a DataSet.
Now while in VS I can go to WebSite -> Add New Item -> DataSet slap my tables on there and away I go (at least it seems that way). If I do that, what exactly is the difference between doing that and using the dataset class? When I do that, is that not creating the dataset? I see all the classes it created (I named mine Trucking). I see all the SQL statements in the classes.
I imagine I must be missing something *REALLY* simple or this just went way over my head at by at least 40,000 ft.
Thanks,
marly 

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Jun 19, 2008

Hai,i'm new asp.net and vb.net
 i have few textboxes and few dropdownlists.i want to insert data in (.mdf )database with these textboxes and dropdown lists
please anybody can tell me a sample and simple example.
 
Thanking you
 

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Mar 11, 2007

Hi, I have a page created within VS 2005 which uses a detailsView with a SQLDataSource which has insert, edit and delete items allowed with it. The problem is that if I delete a record I dont want to refresh the page as I want to set a label value to say item deleted. The problem then though is to select the item to delete I have a drop down which populates the details view on index change, but if I delete the item I cannot do a databind when its complete because it just binds to the existing dataset and does not do a fresh call on the database.Is there a command I can run to refresh the dataset on click of the delete button?Thanks 

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Mar 4, 2008

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Nov 9, 2006

Hey all,
 I had a few questions about how to properly use the sqldatasource -
I have a form with a single dropdownlist, databound to an sqldatasource that just has a select statement. Over the course of time, the client has requested additional dropdownlists, all of which point to different sqldatasources. After I reached 4 or 5, I noticed the page started to load incredibly slower. I played around with the caching features, and after a good while of reading up on it, finally was able to cache the page /data and notice an increase.
 Later, another 4 dropdownlists were added, 3 of which all take the same data. I assumed if I had 3 dropdownlists, which need the same data, I should use the same sqldatasource. What do you think? My page is behaving unaccepteably slow again.
As a test, I created a new page, and bound it in the same fashion. I slowly added more dropdownlists /sqldatasources, and found it lags a bit on the initial load time (maybe 10-12 seconds of processing time before the page loads). The tables it is pulling data from do not have a primary key, and i'm doing select statements that return roughly 100-200 rows of data (per dropdownlist on average). I'm only selecting 1 column name (no select * here)
 I'm just curious if anyone has experienced similar issues, and also if there is anything I should do as a best practice while working with the sqldatasource. I've used hundreds of these on forms, and never experienced a problem. I only started noticing this on pages that have multiple. Also, when using multiple dropdowns that need the same data (I know that sounds goofy - why have 3 dropdownlists with the same data) should I use 3 individual datasources?
 Thanks for your help in advance,
Mike

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Apr 18, 2007

We are tired of null values coming out of from the database and we are directly coding behind UI decleratively.
We set up a null value coding standarts but I wonder what are the disadvantages to our approach
DataType         The default value we send                 ALLOW NULL 
int,bit,decimal                          0                                   NOnvarchar(string)                  " "(one space)                       NOdatetime                                                                       YESbinary                                                                           YES
*in datetime we do not allow nulls in places such as _CREATEDATE and _LASTMODIFYDATE fields.
What are other approaches for null besides writing your own layer to handle it ?

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May 28, 2006

Hello,
I would like to databind a textbox (the Text property) and I have try the following syntax:
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but there's no Datasource property for this control. I have defined a SqlDatasource object but can I link it to my Textbox. I have looked at the properties of the control: there's a Expressions section in which I can configure a connection string but thar's all.
When I run the page I have no error but the textbox field is empty.
Thanks for your help.

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Sep 18, 2007

Does anybody know a good way to get a (near) live view of a sqlce database that doesn't involve ResultSets? I tried to use a resultset with the Sensitive option set, but it doesn't like the joins that I have to do in order to have the data make sense to the user.

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Apr 27, 2006

I have a windows form containing some text boxes and radio buttons bount to an SQL Server database, with code like the following:

this.tbBorrowerLastName.DataBindings.Add (new Binding("Text", dsData.Tables["Results"],"BorrowerLastName"();

this.rbMale.DataBindings.Add(new Binding("Checked", dsData.Tables["Results"],"Male"))

If I add a new row and try to move there using the code below, nothing happens (neither movement to a new position nor error message), unless I remove the radio button bindings. (The same thing occurs if I attempt to move to any record that has a null value in the database field for a radio button).

myLastRow = dsData.Tables["Results"].NewRow();

dsData.Tables["Results"].Rows.Add(myLastRow);

I attempt to move by changing the value of the position property of the BindingContext object.

How can I retain the radio button bindings and still be able to add and move to a new row?

Any help would be appreciated.

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Feb 19, 2008

Hello Everyone!

I am getting started with DataBinding with SSE 2005 and VC#

The problem i am facing is that i need to bind a group of radio buttons eg: Duration Type: Days, Weeks, Months, Years.

The field type in the database is tinyint and the values are 1,2,3,4 for Days, Weeks, Months and Years respectively.

How can i bind a group of radio buttons to the tinyint data in table?

Any help/hint is appericiated.

Thankyou for taking the time to read this.

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Jan 22, 2007

Hello,
I have a page with a detailsview where I can add articles (Generated by visual studio). Now the table contains a field (Autor) wich must contain the username of the Autor from the article. But when I run my page now I have to give it in manually ( in a textbox). I've searching for a way to bind the Profile Username with the insert Sql Query, @Autor value.
I tought maybe I should insert the value of the Profile username in the textbox and put the textbox visibel on false.
But When i saw the component code I saw that Text= is already bound, so it's not possible to insert a value<asp:TextBox ID="auteurTextBox" Visible="true" runat="server" Text='<%# Bind("auteur") %>'> Here is whole the page code (line 23 is the textbox). 1 <asp:FormView ID="FormView1" runat="server" DataKeyNames="id" DataSourceID="SqlDataSource1" AllowPaging="True" CellPadding="4" ForeColor="#333333" style="left: 30%; position: relative">
2 <EditItemTemplate>
3 <asp:Label ID="idLabel1" Visible="false" runat="server" Text='<%# Eval("id") %>'></asp:Label>
4 <asp:TextBox ID="auteurTextBox" Visible="false" runat="server" Text='<%# Bind("auteur") %>'>
5 </asp:TextBox>
6 soort:
7 <asp:TextBox ID="soortTextBox" runat="server" Text='<%# Bind("soort") %>'>
8 </asp:TextBox><br />
9 titel:
10 <asp:TextBox ID="titelTextBox" runat="server" Text='<%# Bind("titel") %>'>
11 </asp:TextBox><br />
12 text:
13 <asp:TextBox ID="textTextBox" Height="200px" TextMode="MultiLine" Rows="20" Width="260px" runat="server" Text='<%# Bind("text") %>'>
14 </asp:TextBox><br />
15 <asp:LinkButton ID="UpdateButton" runat="server" CausesValidation="True" CommandName="Update"
16 Text="Update">
17 </asp:LinkButton>
18 <asp:LinkButton ID="UpdateCancelButton" runat="server" CausesValidation="False" CommandName="Cancel"
19 Text="Cancel">
20 </asp:LinkButton>
21 </EditItemTemplate>
22 <InsertItemTemplate>
23 <asp:TextBox ID="auteurTextBox" Visible="true" runat="server" Text='<%# Bind("auteur") %>'>
24 </asp:TextBox><br />
25 Soort:
26 <asp:TextBox ID="soortTextBox" runat="server" Text='<%# Bind("soort") %>'>
27 </asp:TextBox><br />
28 titel:
29 <asp:TextBox ID="titelTextBox" runat="server" Text='<%# Bind("titel") %>'>
30 </asp:TextBox><br />
31 text:
32 <asp:TextBox ID="textTextBox" runat="server" Text='<%# Bind("text") %>'>
33 </asp:TextBox><br />
34 <asp:LinkButton ID="InsertButton" runat="server" CausesValidation="True" CommandName="Insert"
35 Text="Insert">
36 </asp:LinkButton>
37 <asp:LinkButton ID="InsertCancelButton" runat="server" CausesValidation="False" CommandName="Cancel"
38 Text="Cancel">
39 </asp:LinkButton>
40 </InsertItemTemplate>
41 <ItemTemplate>
42 <asp:Label ID="idLabel" Visible="false" runat="server" Text='<%# Eval("id") %>'></asp:Label><br />
43 <asp:Label ID="auteurLabel" Visible="false" runat="server" Text='<%# Bind("auteur") %>'></asp:Label><br />
44 soort:
45 <asp:Label ID="soortLabel" runat="server" Text='<%# Bind("soort") %>'></asp:Label><br />
46 titel:
47 <asp:Label ID="titelLabel" runat="server" Text='<%# Bind("titel") %>'></asp:Label><br />
48 text:
49 <asp:Label ID="textLabel" runat="server" Text='<%# Bind("text") %>'></asp:Label><br />
50 <asp:LinkButton ID="EditButton" runat="server" CausesValidation="False" CommandName="Edit"
51 Text="Edit">
52 </asp:LinkButton>
53 <asp:LinkButton ID="DeleteButton" runat="server" CausesValidation="False" CommandName="Delete"
54 Text="Delete">
55 </asp:LinkButton>
56 <asp:LinkButton ID="NewButton" runat="server" CausesValidation="False" CommandName="New"
57 Text="New">
58 </asp:LinkButton>
59 </ItemTemplate>
60 <FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
61 <EditRowStyle BackColor="#2461BF" />
62 <RowStyle BackColor="#EFF3FB" />
63 <PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" />
64 <HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
65 </asp:FormView>
66 <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConflictDetection="CompareAllValues"
67 ConnectionString="<%$ ConnectionStrings<img src="images/smilies/biggrinn.gif" border="0" alt="">atabankConnectie %>" DeleteCommand="DELETE FROM [artikel2] WHERE [id] = @original_id AND [auteur] = @original_auteur AND [soort] = @original_soort AND [titel] = @original_titel AND [text] = @original_text"
68 InsertCommand="INSERT INTO [artikel2] ([auteur], [soort], [titel], [text]) VALUES (@auteur, @soort, @titel, @text)"
69 OldValuesParameterFormatString="original_{0}" SelectCommand="SELECT * FROM [artikel2] WHERE [auteur] = @auteur"
70 UpdateCommand="UPDATE [artikel2] SET [auteur] = @auteur, [soort] = @soort, [titel] = @titel, [text] = @text WHERE [id] = @original_id AND [auteur] = @original_auteur AND [soort] = @original_soort AND [titel] = @original_titel AND [text] = @original_text">
71 <DeleteParameters>
72 <asp src="images/smilies/tongue.gif" border="0" alt="">arameter Name="original_id" Type="Int32">
73 <asp src="images/smilies/tongue.gif" border="0" alt="">arameter Name="original_auteur" Type="String">
74 <asp src="images/smilies/tongue.gif" border="0" alt="">arameter Name="original_soort" Type="String">
75 <asp src="images/smilies/tongue.gif" border="0" alt="">arameter Name="original_titel" Type="String">
76 <asp src="images/smilies/tongue.gif" border="0" alt="">arameter Name="original_text" Type="String">
77 </DeleteParameters>
78 <UpdateParameters>
79 <asp src="images/smilies/tongue.gif" border="0" alt="">arameter Name="auteur" Type="String">
80 <asp src="images/smilies/tongue.gif" border="0" alt="">arameter Name="soort" Type="String">
81 <asp src="images/smilies/tongue.gif" border="0" alt="">arameter Name="titel" Type="String">
82 <asp src="images/smilies/tongue.gif" border="0" alt="">arameter Name="text" Type="String">
83 <asp src="images/smilies/tongue.gif" border="0" alt="">arameter Name="original_id" Type="Int32">
84 <asp src="images/smilies/tongue.gif" border="0" alt="">arameter Name="original_auteur" Type="String">
85 <asp src="images/smilies/tongue.gif" border="0" alt="">arameter Name="original_soort" Type="String">
86 <asp src="images/smilies/tongue.gif" border="0" alt="">arameter Name="original_titel" Type="String">
87 <asp src="images/smilies/tongue.gif" border="0" alt="">arameter Name="original_text" Type="String">
88 </UpdateParameters>
89 <InsertParameters>
90 <asp src="images/smilies/tongue.gif" border="0" alt="">arameter Name="auteur" Type="String">
91 <asp src="images/smilies/tongue.gif" border="0" alt="">arameter Name="soort" Type="String">
92 <asp src="images/smilies/tongue.gif" border="0" alt="">arameter Name="titel" Type="String">
93 <asp src="images/smilies/tongue.gif" border="0" alt="">arameter Name="text" Type="String">
94 </InsertParameters>
95 </asp:SqlDataSource>
96 </LoggedInTemplate>
97 </asp:LoginView>
98 </asp:Content>
99
 
 Can somebody help me?

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DataBinding: 'System.Data.DataRowView' Does Not Contain A Property With The Name

Feb 16, 2007

Here's a new one I came across that stumped me for a bit.
DataBinding: 'System.Data.DataRowView' does not contain a property with the name 'xxxx'.
It appears that one of my dropdown menus was referencing the old SqlDataSource1for its data source id.
I had already changed the name of the of the id to something else though.
To fix it, I just updated the reference to the new name.
 
Thought I'd share, just in case
 

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DataBinding: 'System.Data.DataRowView' Does Not Contain A Property With The Name 'RMID'.

Aug 11, 2006

I m trying to UPDATE database using FormView and SqlDataSource and here is my code:
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<UpdateParameters>
<asp:FormParameter FormField="txtFName" Name="FIRSTNAME" />
<asp:FormParameter FormField="txtLName" Name="LASTNAME" />
<asp:FormParameter FormField="ddlSkillCat" Name="SKILLCATID" />
<asp:FormParameter FormField="ddlRM" Name="RMID" />
<asp:FormParameter FormField="ddlAMGroup" Name="AMGROUPID" />
<asp:FormParameter FormField="txtSkillset" Name="SKILLSET" />
<asp:FormParameter FormField="ddlStatus" Name="STATUSID" Type="Int16" />
<asp:FormParameter FormField="txtLocation" Name="LOCATION" />
<asp:FormParameter FormField="txtComments" Name="COMMENTS"/>
<asp:FormParameter FormField="txtProfile" Name="PROFILE" />
<asp:FormParameter FormField="cbAvailable" Name="ISAVAILABLE" />
<asp:QueryStringParameter Type="Int32"
Name="ID"
QueryStringField="id" />
</UpdateParameters>

</asp:SqlDataSource>
//*******************************************************************
<asp:FormView DefaultMode="Edit" ID="FormView1" runat="server" DataSourceID="sqlDS1" DataKeyNames="id">
<EditItemTemplate>
<tr>
<td class="blacktextbold">
Resource Manager:
</td>
<td class="blacktext">
<asp:DropDownList ID="ddlRM" CssClass="blacktext" runat="server" DataSource="<%#GetRM()%>" DataTextField="RMName" DataValueField="userID" SelectedValue="<%#Bind('RMID')%>" AppendDataBoundItems="true">
<asp:ListItem Value="-1">--Select RM--</asp:ListItem>
</asp:DropDownList>
<asp:CustomValidator ID="cvRM" runat="server" ValidationGroup="gpInsert" ControlToValidate="ddlRM" ClientValidationFunction="validateDropdown" OnServerValidate="servervalidateDropdown" Display="Dynamic" ErrorMessage="Required Field" CssClass="redtextsmallbold" />
</td>
</tr>
//********************************************************
here is my GetRM() function:
protected DataSet GetRM()
{
string strConnection = ConfigurationManager.ConnectionStrings["myDB"].ToString();
SqlConnection objConnection = new SqlConnection(strConnection);
String sqlSkillCats = "SELECT Roles.roleID, Roles.roleName, UsersInRoles.userID, UsersInRoles.roleID AS Expr1, Users.firstName + ' ' + Users.lastName AS RMName, Users.id AS Expr2" +
" FROM Users INNER JOIN" +
" UsersInRoles ON Users.id = UsersInRoles.userID CROSS JOIN" +
" Roles" +
" WHERE (Roles.roleName = 'accountmanager') AND (UsersInRoles.roleID = Roles.roleID) ORDER BY Users.firstName";
SqlDataAdapter objAdapter = new SqlDataAdapter(sqlSkillCats, objConnection);
objConnection.Open();
//ddlDataSet = new DataSet();
try
{
objAdapter.Fill(dsConsultantRM, "ConsultantRM");
}
catch (Exception ex)
{
Response.Write(ex.Message);
}
objConnection.Close();
return dsConsultantRM;
}//******************************************************************
i get this error when i load the page:DataBinding: 'System.Data.DataRowView' does not contain a property with the name 'RMID'.
basically i m trying to UPDATE database using the value selected in the DropDownList, can anyone tell me whats wrong here...PLZ HELP!

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Sep 16, 2006

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Mar 22, 2007

Hi,Seems like a lot of people are having a similiar problem that I am having right now, but I am not able to find the solution to it. On the Page_load event, the gridview does display the data from database. When I click a button to insert the same data but different Waste_Profile_Num value, it gives me the databinding error. Component_Profile_ID is declared as an Identity and it is the primary key to the table. Anyway help???Ok, the following are code that I have:  1 <asp:SqlDataSource ID="sqlDSMaterialComposition" runat="server" ConnectionString="<%$ ConnectionStrings:HAZConnectionString %>"
2 SelectCommand="SELECT dbo.Component_Profile.Component_Profile_ID AS Component_Profile_ID, dbo.Component.Component, dbo.Component_Profile.Concentration, dbo.Component_Profile.Range, dbo.Component_Profile.Waste_Profile_Num, dbo.Component.Component_ID FROM dbo.Component INNER JOIN dbo.Component_Profile ON dbo.Component.Component_ID = dbo.Component_Profile.Component_ID WHERE (dbo.Component_Profile.Waste_Profile_Num = @Waste_Profile_Num)">
3 <SelectParameters>
4 <asp:SessionParameter Name="Waste_Profile_Num" SessionField="Waste_Profile_Num" Type="Int32" />
5 </SelectParameters>
6 </asp:SqlDataSource>
7
8
9 <asp:GridView ID="GridViewMaterialComposition"
10 runat="server"
11 DataKeyNames="Component_Profile_ID,Component_ID"
12 AutoGenerateColumns="False" ShowFooter="true">
13 <Columns>
14 <asp:BoundField DataField="Component" HeaderText="Component" SortExpression="Component" FooterText="Total"/>
15 <asp:TemplateField HeaderText="Concentration" FooterStyle-Font-Bold="true">
16 <ItemTemplate>
17 <%# SumConcentration(decimal.Parse(Eval("Concentration").ToString())).tostring("N2") %>
18 </ItemTemplate>
19 <FooterTemplate>
20 <%# GetConcentration().tostring("N2") %>
21 </FooterTemplate>
22 </asp:TemplateField>
23 <asp:BoundField DataField="Range" HeaderText="Range" SortExpression="Range" />
24 <asp:BoundField DataField="Component_Profile_ID" HeaderText="Component_Profile_ID" ReadOnly="True" SortExpression="Component_Profile_ID" Visible="true" />
25 <asp:BoundField DataField="Component_ID" HeaderText="Component_ID" ReadOnly="True" SortExpression="Component_ID" Visible="true"/>
26 <asp:BoundField DataField="Waste_Profile_Num" HeaderText="Waste_Profile_Num" ReadOnly="true" SortExpression="Waste_Profile_Num" Visible="true" />
27 <asp:CommandField ShowEditButton="true" />
28 <asp:TemplateField Visible="false">
29 <ItemTemplate>
30 <asp:Label ID="lblComponentProfileID" runat="Server" Text='<% # Eval("Component_Profile_ID") %>'></asp:Label>
31 <asp:Label ID="lblComponentID" runat="Server" Text='<% # Eval("Component_ID") %>'></asp:Label>
32 </ItemTemplate>
33 </asp:TemplateField>
34 </Columns>
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2 sqlDSMaterialComposition.SelectCommand = sqlSelect
3 Try
4 Dim dvComposition As Data.DataView = CType(sqlDSMaterialComposition.Select(DataSourceSelectArguments.Empty), Data.DataView)
5 For Each dr As Data.DataRow In dvComposition.Table.Rows
6 insertSql = "INSERT INTO Component_Profile ([Range], [Concentration], [Component_ID], [Waste_Profile_Num]) "
7 insertSql &= "VALUES (" & dr("Range").ToString.Trim & ", " & dr("Concentration").ToString.Trim & ", " & dr("Component_ID").ToString.Trim & ", " & CInt(Session("Waste_Profile_Num").ToString()) & ")"
8 sqlDSMaterialComposition.InsertCommand = insertSql
9 sqlDSMaterialComposition.Insert()
10 Next
11 Catch ex As Exception
12
13 End Try
    

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Mar 13, 2008

I am actually a newbie to asp.net and i m using ASP.net 3.5 i.e, VWD 2008. i am using it for the first time as my tool to develop a website for my final year project. i am planning to develop an online job recruitment site like www.monster.com. Rigth now i am confused how will i manage my database. i've learned to use databinding concept of SQL SERVER in VWD 2008 but will it be enough to handle such huge # of Job postings and employers and as well as Resumes in pdf of word format? or do i have to create a separate databse in SQL Server and to connect it with my website? i am confused at the moment. please help me in this matter.
Regards,
Jigzy

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