C# 使用ItemTemplate隐藏GridView列
我在.aspx页面中有一个GridView,我想基于aspx.cs BindData方法隐藏该页面中的列。我试过使用下面的代码,但无法隐藏。我正在使用Asp.net和C 下面是我的GridView和列,我还包括了按钮点击代码C# 使用ItemTemplate隐藏GridView列,c#,asp.net,data-binding,gridview,C#,Asp.net,Data Binding,Gridview,我在.aspx页面中有一个GridView,我想基于aspx.cs BindData方法隐藏该页面中的列。我试过使用下面的代码,但无法隐藏。我正在使用Asp.net和C 下面是我的GridView和列,我还包括了按钮点击代码 <GridView> <Columns> <asp:BoundField DataField="id" HeaderText="Id" SortExpression="id" Visible="
<GridView>
<Columns>
<asp:BoundField DataField="id" HeaderText="Id" SortExpression="id"
Visible="false" />
<asp:TemplateField HeaderText="RollNo" >
<ItemTemplate>
<%# Eval("st_rollno")%>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="tbsturollno" runat="Server"
Text='<%# Eval("st_rollno") %>'></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Name">
<ItemTemplate>
<%# Eval("st_name")%>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="tbstuname" runat="Server"
Text='<%# Eval("st_name") %>'></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Theory">
<ItemTemplate>
<%# Eval("theory")%>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="tbtheory" runat="Server"
Text='<%# Eval("theory") %>'></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Total" >
<ItemTemplate>
<%# Eval("ttotal")%>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="tbtheorytotal" runat="Server"
Text='<%# Eval("ttotal") %>'></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Lab" >
<ItemTemplate>
<%# Eval("lab")%>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="tblab" runat="Server"
Text='<%# Eval("lab") %>'>
</asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Total" >
<ItemTemplate>
<%# Eval("ltotal")%>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="tblabtotal" runat="Server"
Text='<%# Eval("ltotal") %>'></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Tutorial" >
<ItemTemplate>
<%# Eval("tutorial")%>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="tbtutorial" runat="Server"
Text='<%# Eval("tutorial") %>'></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Total" >
<ItemTemplate>
<%# Eval("tutotal")%>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="tbtutorialtotal" runat="Server"
Text='<%# Eval("tutotal") %>'></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
</Columns>
</GridView>
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();
}
使用GrideView.DataBind调用回发,将撤消对前端所做的任何更改。尝试在数据绑定后对列执行此操作。使列可见=false应该可以正常工作。。。对于一个简单的问题来说,实现预渲染是过分的。
<asp:GridView runat="server" ID="GridView1"
AutoGenerateColumns="False" OnPreRender="GridView_PreRender">
<Columns>
<asp:BoundField DataField="LastName" HeaderText="LastName" />
<asp:BoundField DataField="FirstName" HeaderText="FirstName" />
</Columns>
</asp:GridView>
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
var users = new List<User>
{
new User {FirstName = "John", LastName = "Doe"},
new User {FirstName = "Marry", LastName = "Newton"},
new User {FirstName = "Joe", LastName = "Black"}
};
GridView1.DataSource = users;
GridView1.DataBind();
}
}
protected void GridView_PreRender(object sender, EventArgs e)
{
foreach (DataControlField column in GridView1.Columns)
if (column.HeaderText == "FirstName")
column.Visible = false;
}