Web Forms :: Can't Compare Data Of One Dropdown List With Another DDL
Apr 22, 2010
I have a web form where there are couple of DDL's; DDL1 and DDL2 respectively. I want the DDL2 to be populated based on the selection made in DDL1. From the DDL1, I just want to extract the first three digits of the value selected in DDL1 and use it in the WHERE clause of SQL query which is used to generate DDL2.
My prob is that I am not able to extract the first three digits out of DDL1 and use it in the WHERE clause of DDL2. I have pasted all my code below:
Protected Sub DropDownList2_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs)
Dim ddl1Value As String = DropDownList1.SelectedValue
ddl1Value = (ddl1Value.Substring(0, 3))
SqlDataSource3.SelectParameters(0).DefaultValue = ddl1Value
SqlDataSource3.DataBind()
End Sub
Code for DDL2:
<asp:DropDownList ID="DropDownList2" runat="server" CssClass="style29"
DataSourceID="SqlDataSource3" DataTextField="IXC_Vendor_Name"
AutoPostBack="True" AppendDataBoundItems="true"
DataValueField="IXC_Vendor_Name" Height="24px" Width="338px"
onselectedindexchanged="DropDownList10_SelectedIndexChanged">
<asp:ListItem Selected = "True" Text = " " Value = " " ></asp:ListItem>
</asp:DropDownList>.......
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Oct 10, 2010
I am stuck at this point "Displaying a dropdown list of Categories with a --None -- Option. I want the gridview control to display 2 dropdown list one in read-only mode and the other in edit mode. When a record is in read-only mode, the dropdownlist's enabled property will be set to false."When it's on a read-only mode, it doesn't display the selected Category. it shows but the "No Category". When i click on edit to edit or change category, it doesn't display the selected category.
The example is given below( I am reading the book Sams Teach yourself ASP.NET 2.0 by Scott Mitchell. page 628)
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<asp:SqlDataSource ID="picturesDataSource" runat="server"
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DeleteCommand="DELETE FROM [Pictures] WHERE [PictureID] = @PictureID"
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<DeleteParameters>
<asp:Parameter Name="PictureID" Type="Int32" />
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<InsertParameters>
<asp:Parameter Name="UserId" />
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<asp:Parameter Name="Title" Type="String" />
<asp:Parameter Name="Description" Type="String" />
<asp:Parameter Name="UploadedOn" Type="DateTime" />
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<SelectParameters>
<asp:ControlParameter ControlID="UserIdValue" Name="UserId" PropertyName="Text"/>
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<UpdateParameters>
<asp:Parameter Name="UserId"/>
<asp:Parameter Name="CategoryID" Type="Int32" />
<asp:Parameter Name="Title" Type="String" />
<asp:Parameter Name="Description" Type="String" />
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<br />
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ConnectionString="<%$ ConnectionStrings:ConnectionString %>"
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<asp:ControlParameter ControlID="UserIdValue" Name="UserId" PropertyName="Text" />
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<br />
<asp:SqlDataSource ID="maxPictureIDDataSource" runat="server"
ConnectionString="<%$ ConnectionStrings:ConnectionString %>" SelectCommand="SELECT MAX(PictureID)
FROM Pictures
WHERE UserId = @UserId">
<SelectParameters>
<asp:ControlParameter ControlID="UserIdValue" Name="UserId"
PropertyName="Text" />
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<br />
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<br />
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<EditRowStyle BackColor="#2461BF" />
<FieldHeaderStyle BackColor="#DEE8F5" Font-Bold="True" />
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<InsertItemTemplate>
<asp:DropDownList ID="pictureCategory" DataSourceID="categoriesDataSource"
runat="server" DataTextField="Name" DataValueField="CategoryID"
SelectedValue='<%# Bind("CategoryID") %>'
Visible='<%# Bind("CategoryID") %>' AppendDataBoundItems="True">
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</asp:TemplateField>
<asp:TemplateField HeaderText="Title" SortExpression="Title">
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<asp:TextBox ID="TextBox2" runat="server" Text='<%# Bind("Title") %>'></asp:TextBox>
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<InsertItemTemplate>
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<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server"
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<asp:Label ID="Label2" runat="server" Text='<%# Bind("Title") %>'></asp:Label>
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</asp:TemplateField>
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<asp:TextBox ID="TextBox3" runat="server" Text='<%# Bind("Description") %>'></asp:TextBox>
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[Code]....
here i include my coding...
when i compile it..it show the data wit the noted data..
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[code]....
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Here is the source code:
[Code]....
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1. I am new to ASP and I can not get this to work:
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}
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code
<asp:TemplateField
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[Code]....
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<p>
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I am using gridview for my application, in the grid i am using dropdown list for two columns ,It's working when i run my application but when i am edit application ddl can't show the editable data ( it show only select).And one more thing that two columns are interrelated , one ddl(Itemgroup) is connected with(ItemName).
View 2 Replies
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A piece of my code:
[Code]....
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</ItemTemplate>
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</FooterTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
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Jan 25, 2011
I have created a dynamic dropdownlist. I need to get the selected values from the dynamic list and store it my sql database.
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Dec 7, 2010
my C# web application contain accessing of database on the basis of datas selected from a dropdown list.. and my pblm is i cant access the first entry from the dropdown, dropdown list contains different dates,when user select one date from dropdown it will redirect to another page.. the page shows details from database on the basis of this particular date.....my C# dropdown's selected index changed code is shown below:-
[Code]....
and HTML code corresponding to this is:-
[Code]....
i cant access the first data from dropdwn,even it cant redirect to target page.. other entries (the 2nd 3rd entrie etc) was accessible and it shows the details from database on the basis of that corresponding value(usually some date).
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