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POhow to hide templatefield in gridview
 

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  1. POhow to hide templatefield in gridview
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    <p>I am repeating this question because i am not able to find answer from anywhere.</p> <p>I Have a <code>GridView</code> in .aspx page. I want to hide columns based on aspx.cs <code>BindData()</code> method.</p> <p>I have tried using below code but not able to hide. I am using Asp.net with C#.</p> <p>Below is my <code>GridView</code> with columns and I have also included the <code>Button</code> click code.</p> <p>If I <code>select "T-L"</code> which is in below <code>else-if Ladder</code> i am getting this <code>error</code></p> <p><strong>DataBinding: 'System.Data.DataRowView' does not contain a property with the name 'tutorial'.</strong><br> I have marked a test case error in .aspx</p> <p>For temporary to make my program work i am using 4 gridview to bind 4 query,which is not feasible...How can i hide templatefield invisible based on conditions... plz help me..</p> <pre><code>&lt;GridView&gt; &lt;Columns&gt; &lt;asp:BoundField DataField="id" HeaderText="Id" SortExpression="id" Visible="false" /&gt; &lt;asp:TemplateField HeaderText="RollNo" &gt; &lt;ItemTemplate&gt; &lt;%# Eval("st_rollno")%&gt; &lt;/ItemTemplate&gt; &lt;EditItemTemplate&gt; &lt;asp:TextBox ID="tbsturollno" runat="Server" Text='&lt;%# Eval("st_rollno") %&gt;'&gt;&lt;/asp:TextBox&gt; &lt;/EditItemTemplate&gt; &lt;/asp:TemplateField&gt; &lt;asp:TemplateField HeaderText="Name"&gt; &lt;ItemTemplate&gt; &lt;%# Eval("st_name")%&gt; &lt;/ItemTemplate&gt; &lt;EditItemTemplate&gt; &lt;asp:TextBox ID="tbstuname" runat="Server" Text='&lt;%# Eval("st_name") %&gt;'&gt;&lt;/asp:TextBox&gt; &lt;/EditItemTemplate&gt; &lt;/asp:TemplateField&gt; &lt;asp:TemplateField HeaderText="Theory"&gt; &lt;ItemTemplate&gt; &lt;%# Eval("theory")%&gt; &lt;/ItemTemplate&gt; &lt;EditItemTemplate&gt; &lt;asp:TextBox ID="tbtheory" runat="Server" Text='&lt;%# Eval("theory") %&gt;'&gt;&lt;/asp:TextBox&gt; &lt;/EditItemTemplate&gt; &lt;/asp:TemplateField&gt; &lt;asp:TemplateField HeaderText="Total" &gt; &lt;ItemTemplate&gt; &lt;%# Eval("ttotal")%&gt; &lt;/ItemTemplate&gt; &lt;EditItemTemplate&gt; &lt;asp:TextBox ID="tbtheorytotal" runat="Server" Text='&lt;%# Eval("ttotal") %&gt;'&gt;&lt;/asp:TextBox&gt; &lt;/EditItemTemplate&gt; &lt;/asp:TemplateField&gt; &lt;asp:TemplateField HeaderText="Lab" &gt; &lt;ItemTemplate&gt; &lt;%# Eval("lab")%&gt; &lt;/ItemTemplate&gt; &lt;EditItemTemplate&gt; &lt;asp:TextBox ID="tblab" runat="Server" Text='&lt;%# Eval("lab") %&gt;'&gt; &lt;/asp:TextBox&gt; &lt;/EditItemTemplate&gt; &lt;/asp:TemplateField&gt; &lt;asp:TemplateField HeaderText="Total" &gt; &lt;ItemTemplate&gt; &lt;%# Eval("ltotal")%&gt; &lt;/ItemTemplate&gt; &lt;EditItemTemplate&gt; &lt;asp:TextBox ID="tblabtotal" runat="Server" Text='&lt;%# Eval("ltotal") %&gt;'&gt;&lt;/asp:TextBox&gt; &lt;/EditItemTemplate&gt; &lt;/asp:TemplateField&gt; &lt;asp:TemplateField HeaderText="Tutorial" &gt; &lt;ItemTemplate&gt; *Error is HERE &lt;%# Eval("tutorial")%&gt; &lt;/ItemTemplate&gt; &lt;EditItemTemplate&gt; &lt;asp:TextBox ID="tbtutorial" runat="Server" Text='&lt;%# Eval("tutorial") %&gt;'&gt;&lt;/asp:TextBox&gt; &lt;/EditItemTemplate&gt; &lt;/asp:TemplateField&gt; &lt;asp:TemplateField HeaderText="Total" &gt; &lt;ItemTemplate&gt; &lt;%# Eval("tutotal")%&gt; &lt;/ItemTemplate&gt; &lt;EditItemTemplate&gt; &lt;asp:TextBox ID="tbtutorialtotal" runat="Server" Text='&lt;%# Eval("tutotal") %&gt;'&gt;&lt;/asp:TextBox&gt; &lt;/EditItemTemplate&gt; &lt;/asp:TemplateField&gt; &lt;/Columns&gt; &lt;/GridView&gt; private void BindData() { DataTable dt = new DataTable(); using (SqlConnection con = new SqlConnection(ConnectionString)) { if (stype.Equals("L")) { query = "SELECT [id], [st_rollno], [st_name], [lab], [ltotal] FROM [Attendence_Subject_Wise] WHERE (([branch_name] = @branch_name) AND ([scode] = @scode) AND ([sem_no] = @sem_no) AND ([sess_no] = @sess_no)) ORDER BY [st_rollno]"; GridView1.Columns[3].Visible = false; GridView1.Columns[4].Visible = false; GridView1.Columns[7].Visible = false; GridView1.Columns[8].Visible = false; } else if (stype.Equals("T")) { query = "SELECT [id], [st_rollno], [st_name], [theory], [ttotal] FROM [Attendence_Subject_Wise] WHERE (([branch_name] = @branch_name) AND ([scode] = @scode) AND ([sem_no] = @sem_no) AND ([sess_no] = @sess_no)) ORDER BY [st_rollno]"; GridView1.Columns[5].Visible = false; GridView1.Columns[6].Visible = false; GridView1.Columns[7].Visible = false; GridView1.Columns[8].Visible = false; } else if (stype.Equals("T-L")) { GridView1.Columns[7].Visible = false; GridView1.Columns[8].Visible = false; query = "SELECT [id], [st_rollno], [st_name], [theory], [ttotal], [lab], [ltotal] FROM [Attendence_Subject_Wise] WHERE (([branch_name] = @branch_name) AND ([scode] = @scode) AND ([sem_no] = @sem_no) AND ([sess_no] = @sess_no)) ORDER BY [st_rollno]"; } else { query = "SELECT [id], [st_rollno], [st_name],[theory], [ttotal], [lab], [ltotal], [tutorial], [tutotal] FROM [Attendence_Subject_Wise] WHERE (([branch_name] = @branch_name) AND ([scode] = @scode) AND ([sem_no] = @sem_no) AND ([sess_no] = @sess_no)) ORDER BY [st_rollno]"; } com = new SqlCommand(query); com.Parameters.Add("@branch_name", dept); com.Parameters.Add("@scode", dpsubject.SelectedItem.Text.ToString()); com.Parameters.Add("@sem_no", Int32.Parse(dpsemno.SelectedItem.Text.ToString())); com.Parameters.Add("@sess_no",Int32.Parse(dpsessional.SelectedItem.Text.ToString())); using (SqlDataAdapter sda = new SqlDataAdapter()) { com.Connection = con; con.Open(); sda.SelectCommand = com; sda.Fill(dt); GridView1.DataSource = dt; GridView1.DataBind(); con.Close(); } } } protected void bsubmit_Click(object sender, EventArgs e) { this.BindData(); } </code></pre>
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