Databases
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    <p>Try this it work on my machine on your code on aspx.cs page:</p> <pre><code> protected void GridView1_RowUpdating1(object sender, GridViewUpdateEventArgs e) { string id = GridView1.DataKeys[e.RowIndex].Values["duty_slip_no"].ToString(); Label duty_slip_no = (Label)GridView1.Rows[e.RowIndex].FindControl("lbldutyslip"); TextBox txtdate = (TextBox)GridView1.Rows[e.RowIndex].FindControl("txtdate"); SqlCommand cmd = new SqlCommand("update add_duty_slip set slip_date='" + txtdate.Text + "',company='" + txtcompany.Text + "' where duty_slip_no=" + id, con); con.Open(); cmd.ExecuteNonQuery(); GridView1.EditIndex = -1; con.Close(); lblMessage.Text = "Update Successfully"; } </code></pre> <p>and on aspx page:</p> <pre><code> &lt;asp:GridView ID="GridView1" DataKeyNames="duty_slip_no" runat="server" AutoGenerateDeleteButton="True" AutoGenerateEditButton="True" onrowcancelingedit="GridView1_RowCancelingEdit" onrowdeleting="GridView1_RowDeleting1" onrowediting="GridView1_RowEditing1" onrowupdated="GridView1_RowUpdated" onrowupdating="GridView1_RowUpdating1" AutoGenerateColumns="False"&gt; &lt;Columns&gt; &lt;asp:TemplateField HeaderText="Date"&gt; &lt;EditItemTemplate&gt; &lt;asp:TextBox ID="txtdate" runat="server" Text='&lt;%#Eval("slip_date") %&gt;'/&gt; &lt;/EditItemTemplate&gt; &lt;ItemTemplate&gt; &lt;asp:Label ID="lbldate" runat="server" Text='&lt;%#Eval("slip_date") %&gt;'/&gt; &lt;/ItemTemplate&gt; &lt;/asp:TemplateField&gt; &lt;asp:TemplateField HeaderText="company"&gt; &lt;EditItemTemplate&gt; &lt;asp:TextBox ID="txtcompany" runat="server" Text='&lt;%#Eval("company") %&gt;'/&gt; &lt;/EditItemTemplate&gt; &lt;ItemTemplate&gt; &lt;asp:Label ID="lblcompany" runat="server" Text='&lt;%#Eval("company") %&gt;'/&gt; &lt;/ItemTemplate&gt; &lt;/asp:TemplateField&gt; &lt;/Columns&gt; &lt;/asp:GridView&gt; </code></pre> <p>same for other columns also it work on my machine</p>
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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