Gridview update not working - asp.net

Question

When i click on EDIT button in Grid, it amke all fields editable and provides two options(Update and Cancel). In this Grid, there are two dropdownlists, 3 calenders and some textboxes. If i click on update then all the textbox values updated in the database, but all other fields(dropdown and calender) values in database is automatically NULL.
Below is the main page GridView code:
<asp:GridView ID="GridView1" runat="server" CellPadding="5" ForeColor="#333333" width="1000px"
GridLines="None" OnPageIndexChanging="gridView_PageIndexChanging"
AllowSorting="True" OnSorting="gridView_Sorting" AutoGenerateColumns="False" OnRowUpdating="GridView1_RowUpdating"
BorderStyle="Outset" CellSpacing="1" Font-Names="Cambria"
Font-Size="Small" AllowPaging="True" ShowFooter="True"
ShowHeaderWhenEmpty="True"
DataSourceID="SqlDataSource1" onselectedindexchanged="GridView1_SelectedIndexChanged"
>
<AlternatingRowStyle BackColor="White" ForeColor="#284775" />
<Columns>
<asp:BoundField DataField="case_number" HeaderText="Case Number"
SortExpression="case_number" />
<asp:BoundField DataField="case_name" HeaderText="Case Name"
SortExpression="case_name" />
<asp:BoundField DataField="Case_Type_Text" HeaderText="Case Type"
SortExpression="Case_Type_Text" />
<asp:TemplateField HeaderText="Case Status" SortExpression="Case_Status_Text">
<EditItemTemplate>
<asp:DropDownList ID="DropDownList3" runat="server"
DataSourceID="SqlDataSource3" DataTextField="Case_Status_Text" DataValueField="Case_Status_Text"
SelectedValue='<%# Bind("Case_Status_Text") %>'>
</asp:DropDownList>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Bind("Case_Status_Text") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="assigned_date" HeaderText="Assigned Date"
SortExpression="assigned_date" DataFormatString="{0:d}" />
<asp:BoundField DataField="assigned_to" HeaderText="Assigned To"
SortExpression="assigned_to" />
<asp:TemplateField HeaderText="Date Withdrawn" SortExpression="date_withdrawn">
<EditItemTemplate>
<cc1:DatePicker ID="DatePicker5" runat="server" />
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label4" runat="server"
Text='<%# Bind("date_withdrawn", "{0:d}") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Date Delivered" SortExpression="date_delivered">
<EditItemTemplate>
<cc1:DatePicker ID="DatePicker7" runat="server"
/>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label6" runat="server"
Text='<%# Bind("date_delivered", "{0:d}") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="QC By" SortExpression="qc_by">
<EditItemTemplate>
<asp:DropDownList ID="DropDownList5" runat="server"
DataSourceID="SqlDataSource4" DataTextField="User_Name" DataValueField="User_Name"
SelectedValue='<%# Bind("qc_by") %>'>
</asp:DropDownList>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label2" runat="server" Text='<%# Bind("qc_by") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="QC Date" SortExpression="qc_date">
<EditItemTemplate>
<cc1:DatePicker ID="DatePicker6" runat="server"
/>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label5" runat="server" Text='<%# Bind("qc_date", "{0:d}") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Additional Notes">
<EditItemTemplate>
<asp:TextBox ID="TextBox1" runat="server"
Text='<%# Bind("additional_notes") %>' TextMode="MultiLine"></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label3" runat="server" Text='<%# Bind("additional_notes") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:CommandField ShowEditButton="True" ButtonType="Button"
CausesValidation="False" />
</Columns>
<EditRowStyle BackColor="#999999" />
<FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
<RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
<SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
<SortedAscendingCellStyle BackColor="#E9E7E2" />
<SortedAscendingHeaderStyle BackColor="#506C8C" />
<SortedDescendingCellStyle BackColor="#FFFDF8" />
<SortedDescendingHeaderStyle BackColor="#6F8DAE" />
</asp:GridView>
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="<%$ ConnectionStrings:con %>"
ProviderName="<%$ ConnectionStrings:con.ProviderName %>"
SelectCommand="SELECT * FROM [View_Intakesheet]"
UpdateCommand="UPDATE intakesheet SET case_number = #case_number, case_name=#case_name, Case_Type=#case_type, Case_Status = #case_status, assigned_date = #assigned_date, assigned_to = #assigned_to, date_withdrawn= #date_withdrawn, date_delivered= #date_delivered, qc_by = #qc_by, qc_date=#qc_date, additional_notes = #additional_notes WHERE (case_number = #case_number)">
<UpdateParameters>
<asp:Parameter Name="case_number"/>
<asp:Parameter Name="case_name" />
<asp:Parameter Name="case_type" />
<asp:Parameter Name="case_status" />
<asp:Parameter Name="assigned_date" Type="DateTime" />
<asp:Parameter Name="assigned_to" />
<asp:Parameter Name="date_withdrawn" Type="DateTime" />
<asp:Parameter Name="date_delivered" Type="DateTime" />
<asp:Parameter Name="qc_by" />
<asp:Parameter Name="qc_date" Type="DateTime" />
<asp:Parameter Name="additional_notes" />
</UpdateParameters>
</asp:SqlDataSource>
</td>
</tr>
Below is the Update event::
protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
GridViewRow row = (GridViewRow)GridView1.Rows[e.RowIndex];
DropDownList ct = (DropDownList)row.FindControl("case_type");
DropDownList cs = (DropDownList)row.FindControl("case_status");
con.Open();
SqlCommand cmd = new SqlCommand("UPDATE intakesheet SET case_number = #case_number, case_name = #case_name, Case_Type = Case_Type, Case_Status = Case_Status, assigned_date = assigned_date, assigned_to = assigned_to, date_withdrawn= date_withdrawn, date_delivered= date_delivered, qc_by = qc_by, qc_date=qc_date, additional_notes = additional_notes WHERE (case_number = case_number)", immigration);
cmd.ExecuteNonQuery();
GridView1.EditIndex = -1;
con.Close();
bind();
}
public void bind()
{
con.Open();
SqlDataAdapter da = new SqlDataAdapter("select * from intakesheet", con);
DataSet ds = new DataSet();
da.Fill(ds, "intakesheet");
//GridView1.DataSource = ds.Tables[0].DefaultView;
GridView1.DataBind();
con.Close();
}

Answer 1

SqlCommand cmd = new SqlCommand("UPDATE intakesheet SET case_number = #case_number, case_name = #case_name, Case_Type = Case_Type, Case_Status = Case_Status, assigned_date = assigned_date, assigned_to = assigned_to, date_withdrawn= date_withdrawn, date_delivered= date_delivered, qc_by = qc_by, qc_date=qc_date, additional_notes = additional_notes WHERE (case_number = case_number)", immigration);
change this line
mainly problem with these
Case_Type = Case_Type, Case_Status = Case_Status, in update query
DropDownList ct = (DropDownList)row.FindControl("case_type");
DropDownList cs = (DropDownList)row.FindControl("case_status")
;
send ct.SelectedIndex.value if want to send ids if you have bind with its value
if you want send selected index
then
send
dt.SelectedText
like
Case_Type = ct.SelectedItem.Text, Case_Status = cs.SelectedItem.Text
check this line
DropDownList cs = (DropDownList)row.FindControl("DropDownList3")
similary give the correct id for case type
in above line you are passing the ids of dropdown, you should send either its selected value of its selected index
changes
SqlCommand cmd = new SqlCommand("UPDATE intakesheet SET case_number = #case_number, case_name = #case_name, Case_Type = Case_Type, Case_Status = Case_Status, assigned_date = assigned_date, assigned_to = assigned_to, date_withdrawn= date_withdrawn, date_delivered= date_delivered, qc_by = qc_by, qc_date=qc_date, additional_notes = additional_notes WHERE (case_number = case_number)", immigration);
cmd.parameters.add("#case_number",sqldbtype.nvarchar).value = case_number // the string variable of case number
do similar for others parameters

Answer 2

I also had a problem with a GridView that was not updating. Inspection of the e.Newvalues Dictionary in the GridView's RowUpdating event showed that the old values for the record were being sent to the database UPDATE query. DataKeyNames was not my problem; I had it set correctly. The WHERE clause of my SELECT query referenced a control parameter against a TextBox on my form. I had inadvertently set EnableViewState for this textbox to "False". Because of this, the GridView was rebinding itself before the UPDATE occurred. Setting EnableViewState on the TextBox to "True" fixed the problem. Here is the code to see the UPDATE parameters:
Protected Sub MyGridView_RowUpdating _
(sender As Object, e As System.Web.UI.WebControls.GridViewUpdateEventArgs) _
Handles MyGridView.RowUpdating
' Inspect the parameters being sent to the database for an ASP NET GridView UPDATE.
Dim I As Integer
I = 0
For Each MVO As System.Collections.DictionaryEntry In e.OldValues
If MVO.Value Is DBNull.Value OrElse MVO.Value Is Nothing Then
Debug.Print(I.ToString + ": " + MVO.Key + " Value: ")
Else
Debug.Print(I.ToString + ": " + MVO.Key + " Value: " + MVO.Value.ToString)
End If
I += 1
Next MVO
I = 0
For Each MVN As System.Collections.DictionaryEntry In e.NewValues
If MVN.Value Is DBNull.Value OrElse MVN.Value Is Nothing Then
Debug.Print(I.ToString + ": " + MVN.Key + " Value: ")
Else
Debug.Print(I.ToString + ": " + MVN.Key + " Value: " + MVN.Value.ToString)
End If
I += 1
Next MVN
End Sub