C# 如何在ASP.NET中使用DropDownList删除GridView中的一行
这是我的设计页面C# 如何在ASP.NET中使用DropDownList删除GridView中的一行,c#,asp.net,C#,Asp.net,这是我的设计页面 <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="newsamplecomb._Default" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitiona
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="newsamplecomb._Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:GridView ID="GridView1" runat="server" ShowFooter="true" AutoGenerateColumns="False"
BackColor="#DEBA84" BorderColor="#DEBA84" BorderStyle="None" BorderWidth="1px"
CellPadding="3" CellSpacing="2" OnSelectedIndexChanged="GridView1_SelectedIndexChanged1"
Height="246px" onrowdatabound="GridView1_RowDataBound" Width="1017px">
<RowStyle BackColor="#FFF7E7" ForeColor="#8C4510" />
<Columns>
<asp:BoundField />
<asp:TemplateField>
<HeaderTemplate>
Rollno<br />
</HeaderTemplate>
<ItemTemplate>
<asp:DropDownList ID="DropDownList1" runat="server" Height="23px" Width="73px"
AutoPostBack="True"
onselectedindexchanged="DropDownList1_SelectedIndexChanged" >
</asp:DropDownList>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField>
<HeaderTemplate>
Name
</HeaderTemplate>
<ItemTemplate>
<asp:TextBox ID="TextBox1" runat="server" Width="155px" ReadOnly="True"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField>
<HeaderTemplate>
English<br />
</HeaderTemplate>
<ItemTemplate>
<asp:TextBox ID="TextBox2" runat="server" Height="17px" Width="103px"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField>
<HeaderTemplate>
Tamil<br />
</HeaderTemplate>
<ItemTemplate>
<asp:TextBox ID="TextBox3" runat="server" Height="16px" Width="103px"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField>
<HeaderTemplate>
Maths
</HeaderTemplate>
<ItemTemplate>
<asp:TextBox ID="TextBox4" runat="server" Height="16px" Width="103px"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField>
<HeaderTemplate>
Science
</HeaderTemplate>
<ItemTemplate>
<asp:TextBox ID="TextBox5" runat="server" Height="16px" Width="103px"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField>
<HeaderTemplate>
Total<br />
</HeaderTemplate>
<ItemTemplate>
<asp:TextBox ID="TextBox6" runat="server" Height="16px" Width="103px"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField>
<HeaderTemplate>
Grade
</HeaderTemplate>
<ItemTemplate>
<asp:TextBox ID="TextBox7" runat="server" Height="16px" Width="103px"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField>
<ItemTemplate>
<asp:Button ID="ButtonAdd" runat="server" OnClick="ButtonAdd_Click1" Text="+" />
<asp:Button ID="Buttondel" runat="server" Text="Del"></asp:Button>
<asp:RequiredFieldValidator ID="rfv" runat="server" ErrorMessage="" ForeColor="White" ControlToValidate="TextBox1" Width="10" Display="None"></asp:RequiredFieldValidator>
</ItemTemplate>
<FooterStyle HorizontalAlign="Right" />
</asp:TemplateField>
</Columns>
<FooterStyle BackColor="#F7DFB5" ForeColor="#8C4510" />
<PagerStyle ForeColor="#8C4510" HorizontalAlign="Center" />
<SelectedRowStyle BackColor="#738A9C" Font-Bold="True" ForeColor="White" />
<HeaderStyle BackColor="#A55129" Font-Bold="True" ForeColor="White" />
</asp:GridView>
</div>
<%-- //<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ErrorMessage="RequiredFieldValidator" ForeColor="White" ControlToValidate="TextBox1" Width="10"></asp:RequiredFieldValidator>--%>
罗尔诺
名称
英语
泰米尔语
数学
科学类
总计
等级
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
var ddl = (DropDownList)e.Row.FindControl("DropDownList1");
string connection_string = ConfigurationManager.ConnectionStrings["DBC"].ConnectionString;
SqlConnection con = new SqlConnection(connection_string);
con.Open();
SqlCommand cmd = new SqlCommand("Select * from stud_table", con);
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds);
// con.Close();
ddl.DataSource = ds;
ddl.DataTextField = "Rollno";
ddl.DataValueField = "Rollno";
ddl.DataBind();
ddl.Items.Insert(0, new ListItem("--Select--", "0"));
}
}
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
dpditemdesc( sender,e);
DropDownList box1 = (DropDownList)GridView1.Rows[x].Cells[1].FindControl("DropDownList1");
if (box1.Text != "")
{
for (int i = 0; i < GridView1.Rows.Count; i++)
{
GridView1.Rows[i].Cells[2].Enabled = false;
GridView1.Rows[i].Cells[3].Enabled = false;
GridView1.Rows[i].Cells[4].Enabled = false;
GridView1.Rows[i].Cells[5].Enabled = false;
GridView1.Rows[i].Cells[6].Enabled = false;
GridView1.Rows[i].Cells[7].Enabled = false;
GridView1.Rows[i].Cells[8].Enabled = false;
}
}
else
{
for (int i = 0; i < GridView1.Rows.Count; i++)
{
GridView1.Rows[i].Cells[2].Enabled = true;
GridView1.Rows[i].Cells[3].Enabled = true;
GridView1.Rows[i].Cells[4].Enabled = true;
GridView1.Rows[i].Cells[5].Enabled = true;
GridView1.Rows[i].Cells[6].Enabled = true;
GridView1.Rows[i].Cells[7].Enabled = true;
GridView1.Rows[i].Cells[8].Enabled = true;
}
}
}
public void dpditemdesc(object sender, EventArgs e)
{
DropDownList ddl = (DropDownList)sender;
GridViewRow row = (GridViewRow)ddl.NamingContainer;
x = row.RowIndex;
TextBox box = (TextBox)GridView1.Rows[x].Cells[2].FindControl("TextBox1");
if (box.Text == "")
{
try
{
x = Convert.ToInt32(Session["ct"].ToString());
x++;
Session["ct"] = x.ToString();
}
catch
{
x = 0;
Session["ct"] = x.ToString();
}
}
if (ddl.SelectedIndex != 0)
{
string connection_string = ConfigurationManager.ConnectionStrings["DBC"].ConnectionString;
SqlConnection con = new SqlConnection(connection_string);
DropDownList box1 = (DropDownList)GridView1.Rows[x].Cells[1].FindControl("DropDownList1");
TextBox box2 = (TextBox)GridView1.Rows[x].Cells[2].FindControl("TextBox1");
TextBox box3 = (TextBox)GridView1.Rows[x].Cells[3].FindControl("TextBox2");
TextBox box4 = (TextBox)GridView1.Rows[x].Cells[4].FindControl("TextBox3");
TextBox box5 = (TextBox)GridView1.Rows[x].Cells[5].FindControl("TextBox4");
TextBox box6 = (TextBox)GridView1.Rows[x].Cells[6].FindControl("TextBox5");
TextBox box7 = (TextBox)GridView1.Rows[x].Cells[7].FindControl("TextBox6");
TextBox box8 = (TextBox)GridView1.Rows[x].Cells[8].FindControl("TextBox7");
SqlCommand cmd = new SqlCommand("select * from stud_table where Rollno='" + box1.Text + "'", con);
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds);
box2.Text = ds.Tables[0].Rows[0][1].ToString();
box3.Text = ds.Tables[0].Rows[0][2].ToString();
box4.Text = ds.Tables[0].Rows[0][3].ToString();
box5.Text = ds.Tables[0].Rows[0][4].ToString();
box6.Text = ds.Tables[0].Rows[0][5].ToString();
box7.Text = ds.Tables[0].Rows[0][6].ToString();
box8.Text = ds.Tables[0].Rows[0][7].ToString();
}
else
{
// box.Text = "";
Response.Write("<Script>alert('Please Select Item Description')</script>");
}
}
}
}
受保护的无效GridView1\u行数据绑定（对象发送方，GridViewRowEventArgs e）
{
如果（e.Row.RowType==DataControlRowType.DataRow）
{
var ddl=（DropDownList）e.Row.FindControl（“DropDownList1”）；
字符串连接\u string=ConfigurationManager.ConnectionString[“DBC”].ConnectionString；
SqlConnection con=新的SqlConnection（连接\u字符串）；
con.Open（）；
SqlCommand cmd=新的SqlCommand（“从螺柱表格中选择*”，con）；
SqlDataAdapter da=新的SqlDataAdapter（cmd）；
数据集ds=新数据集（）；
da.填充（ds）；
//con.Close（）；
ddl.DataSource=ds；
ddl.DataTextField=“Rollno”；
ddl.DataValueField=“Rollno”；
ddl.DataBind（）；
Insert（0，newlistItem（“--Select--”，“0”）；
}
}
受保护的void DropDownList1\u SelectedIndexChanged（对象发送方，事件参数e）
{
dpdtemdesc（发送方，e）；
DropDownList box1=（DropDownList）GridView1.Rows[x]。Cells[1]。FindControl（“DropDownList1”）；
如果（box1.Text！=“”）
{
对于（int i=0；i