cannot display the right value of a dropdownlist

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Hello,

I have a grid that contains 3 fields: CityID, BranchID and Edit link.

When i click on the edit link, a web user control page "addFacilty.ascx" is displayed with the right edited items.

"addFacilty.ascx" include 2 dropdown lists ddlCity and ddlBranch and 2 textboxes cityid and branchid

I want that the dropdownlists contain as result:

1-ddlcity: the city having id: cityid.text.tostring()
2-ddlbranch: the branch having id : branchid.text.tostring();

Note that cityid and branchid are two textboxes with Text value is bind to grid. so it is automaically filled.

My problem now is that when i click on edit link of the grid. cityid and branchid of the webUser control page displays the right item. but when i want to use their values, cityid and branchid are treated as if they are empty.

below is the code of "addFacilty.ascx":

ASP.NET

 <asp:DropDownList ID="ddlCity" runat="server" DataSourceID="tblCity" DataTextField="city" DataValueField="cityID" AutoPostBack="true" SelectedValueField='<%#DataBinder.Eval( Container, "DataItem.cityID") %>'>
            </asp:DropDownList>
            <asp:SqlDataSource ID="tblCity" runat="server" ConnectionString="<% $ ConnectionStrings:SmartBookingEngineConn %>" SelectCommand="select cityID,city from viewCityAdmin"></asp:SqlDataSource>
        
<asp:DropDownList ID="ddlBranch" runat="server" DataSourceID="tblBranch"
                DataTextField="Branch" DataValueField="BranchID">
           
            </asp:DropDownList>

            <asp:SqlDataSource ID="tblBranch" runat="server" ConnectionString="<%$ ConnectionStrings:SmartBookingEngineConn %>" SelectCommand="SELECT [BranchID],[Branch] FROM [tblBranch] WHERE ([CityID]=@cityID)">
               <SelectParameters>
                <asp:ControlParameter Name="cityID" ControlID="ddlCity" PropertyName="SelectedValue" Type="String" />
               </SelectParameters>
            </asp:SqlDataSource> 

<telerik:RadTextBox ID="cityid"  runat="server" Height="28px" Visible="true"  Text='<%# DataBinder.Eval( Container, "DataItem.cityID"  ) %>' >
            </telerik:RadTextBox>

 <telerik:RadTextBox ID="branchid"  runat="server" Height="28px" Visible="true" Text='<%# DataBinder.Eval( Container, "DataItem.BranchID")%>' AutoPostBack="true">
            </telerik:RadTextBox>

***addFacilty.ascx.cs:

C#

protected void Page_Load(object sender, EventArgs e)
{
if (cityid.Text.ToString() != "" && branchid.Text.ToString() !=""){                      
string selectedIDCity = cityid.Text.ToString();
tblCity.SelectCommand = "Select * from viewCityAdmin where cityID=@cityid";
tblCity.SelectParameters.Clear();
tblCity.SelectParameters.Add("cityid", selectedIDCity);
tblCity.DataBind();

string selectedIDBranch = branchid.Text.ToString();
tblBranch.SelectCommand = "Select * from tblBranch where BranchID=@branchid";
tblBranch.SelectParameters.Clear();
tblBranch.SelectParameters.Add("branchid", selectedIDBranch);
tblBranch.DataBind();
}
}

thank you in advance.

Posted 16-Dec-12 19:53pm

m_safaaaa

Updated 16-Dec-12 20:10pm

v2

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Comments

chathuranga333 17-Dec-12 4:53am

when you are trying to use the values of dropdownlist's. because its value is readable only in edit mode of the grid.

1 solution

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sisir patro · Answer 1 · 2012-12-17T04:44:00

Solution 1

hi,

Change your code to ...

C#

protected void Page_Load(object sender, EventArgs e)
{
if (cityid.Text.ToString() != "" && branchid.Text.ToString() !=""){
string selectedIDCity = cityid.Text.ToString();
tblCity.SelectCommand = "Select * from viewCityAdmin where cityID="+ selectedIDCity ;
tblCity.SelectParameters.Clear();
tblCity.SelectParameters.Add("cityid", selectedIDCity);
tblCity.DataBind();

string selectedIDBranch = branchid.Text.ToString();
tblBranch.SelectCommand = "Select * from tblBranch where BranchID="+ selectedIDBranch ;
tblBranch.SelectParameters.Clear();
tblBranch.SelectParameters.Add("branchid", selectedIDBranch);
tblBranch.DataBind();
}
}

This may work.
Try this out.

Thanks

Posted 17-Dec-12 4:44am

sisir patro

Comments

m_safaaaa 19-Dec-12 2:24am

Still Not Working, cityid and branchid textboxes are treated as if they are empty

[no name] 19-Dec-12 2:57am

Yes you won't get the values as you are trying to retrieve the value on page load. During page load your text box value are not been containing any values. Pass the cityID and BranchId on link button click and assign that valus on page load.Then you can able to achieve your goal.

m_safaaaa 19-Dec-12 5:17am

But the value of the textbox cityid is binded : <telerik:RadTextBox ID="cityid" runat="server" Height="28px" Visible="true" Text='<%# DataBinder.Eval( Container, "DataItem.cityID" ) %>' > and in page load i can see the right values, but when i want to use it it is treated as if it is empty.