GridView用法的修改和删除
（前台）
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"
CellPadding="3" Width="996px"
Height="188px" style="text-align: center" BackColor="White"
BorderColor="#CCCCCC" BorderStyle="None" BorderWidth="1px"
OnRowDeleting="GridView1_RowDeleting" OnRowEditing="GridView1_RowEditing"
OnRowUpdating="GridView1_RowUpdating"
onselectedindexchanged="Page_Load" >
<FooterStyle BackColor="White" ForeColor="#000066" />
<Columns>
<asp:BoundField DataField="ID" HeaderText="ID" ReadOnly="True" />
<%-- <asp:BoundField DataField="Title" HeaderText="新闻标题" />
<asp:BoundField DataField="Contents" HeaderText="新闻内容" />
<asp:BoundField DataField="Type" HeaderText="新闻类型"/>
<asp:BoundField DataField="Author" HeaderText="作者" />
<asp:BoundField DataField="IssueDate" HeaderText="发布时间" />
<asp:CommandField HeaderText="选择" ShowSelectButton="True" />
<asp:CommandField HeaderText="编辑" ShowEditButton="True" />
<asp:CommandField HeaderText="删除" ShowDeleteButton="True" /> --%>
<asp:TemplateField HeaderText="新闻标题">
<ItemTemplate>
<%# Eval("Title") %>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="TBTitle" Text='<%# Eval("Title") %>' runat="server" Width="100px" />
</EditItemTemplate>
<ItemStyle Width="150px" />
</asp:TemplateField>
<asp:TemplateField HeaderText="新闻内容">
<ItemTemplate>
<%# Eval("Contents") %>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="TBContents" Text='<%# Eval("Contents") %>' runat="server" Width="200px" />
</EditItemTemplate>
<ItemStyle Width="350px" />
</asp:TemplateField>
<asp:TemplateField HeaderText="新闻类型">
<ItemTemplate>
<%# Eval("Type") %>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="TBType" Text='<%# Eval("Type") %>' runat="server" AutoPostBack="true" Width="50px" />
</EditItemTemplate>
<ItemStyle Width="50px" />
</asp:TemplateField>
<asp:TemplateField HeaderText="作者">
<ItemTemplate>
<%# Eval("Author")%>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="TBAuthor" Text='<%# Eval("Author") %>' runat="server" Width="100px" />
</EditItemTemplate>
<ItemStyle Width="70px" />
</asp:TemplateField>
<asp:BoundField DataField="IssueDate" HeaderText="发布时间" />
<asp:CommandField ShowDeleteButton="True" ShowEditButton="True" HeaderText="操作" />
</Columns>
<RowStyle ForeColor="#000066" />
<SelectedRowStyle BackColor="#669999" Font-Bold="True" ForeColor="White" />
<HeaderStyle BackColor="#006699" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="White" ForeColor="#000066" HorizontalAlign="Left" />
<SortedAscendingCellStyle BackColor="#F1F1F1" />
<SortedAscendingHeaderStyle BackColor="#007DBB" />
<SortedDescendingCellStyle BackColor="#CAC9C9" />
<SortedDescendingHeaderStyle BackColor="#00547E" />
</asp:GridView>
（后台）
public partial class xinguanli : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{ if (!IsPostBack)
{ GridView1.DataKeyNames = new string[] { "ID" };
bind();
}
}
//删除
protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
{ SqlConnection conn = DB.createSql();
conn.Open();
SqlCommand cmd = new SqlCommand("delete from T_new where ID='" + GridView1.DataKeys[e.RowIndex].Value + "'", conn);
int count = cmd.ExecuteNonQuery();
if (count > 0)
{ Response.Write("<script>alert('删除成功！') </script>");
bind(); }
else {
Response.Write("<script>alert('删除失败！') </script>");
}
}
//编辑 protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
{
GridView1.EditIndex = e.NewEditIndex;
bind();
}
//更新
protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
//string ID = GridView1.DataKeys[e.RowIndex].Values.ToString();
//string Title = ((TextBox)(GridView1.Rows[e.RowIndex].Cells[1].Controls[0])).Text.ToString();
//string Contents = ((TextBox)(GridView1.Rows[e.RowIndex].Cells[2].Controls[0])).Text.ToString();
//string Type = ((TextBox)(GridView1.Rows[e.RowIndex].Cells[3].Controls[0])).Text.ToString();
//string Author = ((TextBox)(GridView1.Rows[e.RowIndex].Cells[4].Controls[0])).Text.ToString();
string ID = GridView1.DataKeys[e.RowIndex].Values[0].ToString();
string Title = ((TextBox)GridView1.Rows[e.RowIndex].FindControl("TBTitle")).Text;
string Contents = ((TextBox)GridView1.Rows[e.RowIndex].FindControl("TBContents")).Text;
string Type = ((TextBox)GridView1.Rows[e.RowIndex].FindControl("TBType")).Text;
string Author = ((TextBox)GridView1.Rows[e.RowIndex].FindControl("TBAuthor")).Text;
string Str = "update T_new set Title='" + Title + "', Contents='" + Contents + "',Type ='" + Type + "', Author ='" + Author + "' where ID=" + ID;
SqlConnection conn = DB.createSql();
conn.Open();
SqlCommand cmd = new SqlCommand(Str,conn);
int Result = cmd.ExecuteNonQuery();
//cmd.ExecuteNonQuery();
cmd.Dispose();
conn.Close();
GridView1.EditIndex = -1;
bind();
//try
//{
// SqlConnection conn = DB.createSql();
// if (conn.State.ToString() == "Closed") conn.Open();
// SqlCommand cmd = new SqlCommand(Str, conn);
// cmd.ExecuteNonQuery();
// cmd.Dispose();
// if (conn.State.ToString() == "Open") conn.Close();
// GridView1.EditIndex = -1;
// bind();
//}
//catch (Exception ex)
//{
// Response.Write("数据库错误，错误原因：" + ex.Message);
// Response.End();
//} }
//取消 protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
{ GridView1.EditIndex = -1;
bind(); }
protected void bind()
{
SqlConnection conn = DB.createSql();
conn.Open();
SqlCommand cmd = new SqlCommand("select * from T_new", conn);
SqlDataAdapter sda = new SqlDataAdapter(cmd);
DataTable dt = new DataTable();
sda.Fill(dt);
GridView1.DataSource =dt;
GridView1.DataKeyNames = new string[]{"ID"}; //{ Convert.ToString(dt.Columns["ID"]) };
GridView1.DataBind();
}
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