ASP.NET----GridView多种用法，以及在后台取对应列的值
在对GridView进行操作时，经常要取一列或者多列的值，比如 点击某一个行的编辑按钮， 对该行数据进行修改。
取数据主键的方法: 比如主键为: DataKeyNames="book_class_id"
后台可以这样取: this.GV_borrow.DataKeys[1].Value.ToString()
不同用法的GridView的取值方法也不相同。
用法一:
<asp:GridView ID="GVStud" runat="server" DataKeyNames="book_class_id"
AllowPaging="True" AutoGenerateColumns="False" CellPadding="4" PageSize="8"
ForeColor="#333333" GridLines="None" OnPageIndexChanging="GVStud_PageIndexChanging"
OnRowEditing="GVStud_RowEditing" OnRowUpdating="GVStud_RowUpdating"
OnRowDeleting="GVStud_RowDeleting" OnRowCancelingEdit="GVStud_RowCancelingEdit"
Width="650px" >
<PagerSettings FirstPageText="第一页" LastPageText="最后页"
NextPageText="下一页" PreviousPageText="前一页" />
<FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
<Columns>
<asp:BoundField DataField="book_class_id" HeaderText="编号" ReadOnly="True" />
<asp:TemplateField HeaderText="类名">
<ItemTemplate>
<%# Eval("book_class_name")%>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="nameEdit" Text='<%# Eval("book_class_name") %>' runat="server" Width="140px" />
</EditItemTemplate>
<ItemStyle Width="150px" />
</asp:TemplateField>
<asp:CommandField HeaderText="操作"
ShowEditButton="True" ButtonType="Button" UpdateText="修改" >
<ItemStyle Width="100px"></ItemStyle>
</asp:CommandField>
<asp:TemplateField ShowHeader="False">
<ItemTemplate>
<asp:LinkButton ID="LinkButton1" runat="server"
CommandName="Delete" Text="删除" OnClientClick="return confirm('您确认删除该记录吗?');" CausesValidation="False" ></asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
</Columns>
<EditRowStyle BackColor="#999999" />
<RowStyle HorizontalAlign="Center" BackColor="#F7F6F3" ForeColor="#333333" Height="20px" />
<SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
<HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<AlternatingRowStyle BackColor="White" ForeColor="#284775" />
</asp:GridView>
后台事件代码：
public void BindStud()
{
string type = "type";
string sql = "select * from book_class order by book_class_id ";
DataSet ds = new DataSet();
ds = CC.GetDataSet(sql, type);
GVStud.DataSource = ds.Tables[0];
GVStud.DataBind();
}
protected void GVStud_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
this.GVStud.PageIndex = e.NewPageIndex;
BindStud();
}
protected void GVStud_RowEditing(object sender, GridViewEditEventArgs e)
{
GVStud.EditIndex = e.NewEditIndex;
BindStud();
}
protected void GVStud_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
}
protected void GVStud_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
{
GVStud.EditIndex = -1;
BindStud();
}
protected void GVStud_RowDeleting(object sender, GridViewDeleteEventArgs e)
{}
主键内容值的提取方法：
String id = GVStud.DataKeys[e.RowIndex].Value.ToString();
对应编辑列的值的提取方法：
string type_title = ((TextBox)GVStud.Rows[e.RowIndex].FindControl("nameEdit")).Text.ToString();
<asp:GridView ID="GV_borrow" runat="server" DataKeyNames="borrow_id"
AutoGenerateColumns="False" CellPadding="4"
ForeColor="#333333" GridLines="None" OnRowCommand="GV_RowCommand"
Width="650px" >
<FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
<Columns>
<asp:BoundField DataField="borrow_id" HeaderText="编号" />
<asp:BoundField DataField="book_id" HeaderText="书编号" />
<asp:BoundField DataField="book_name" HeaderText="书名" />
<asp:BoundField DataField="user_id" HeaderText="借书人" />
<asp:BoundField DataField="value" HeaderText="是否续借" />
<asp:BoundField DataField="borrow_time" HeaderText="借书时间" />
<asp:BoundField DataField="return_time" HeaderText="应还时间" />
<asp:BoundField DataField="borrow_state" HeaderText="状态" />
<asp:BoundField DataField="owe_money" HeaderText="欠款" />
<asp:TemplateField ShowHeader="False">
<ItemTemplate>
<asp:LinkButton ID="update" OnClientClick="showUpdate()" runat="server" CausesValidation="false" CommandName="up" CommandArgument='<%# bind("book_id") %>' Text="还书">
</asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
</Columns>
<RowStyle ForeColor="#000066" />
<FooterStyle BackColor="White" ForeColor="#000066" />
<PagerStyle BackColor="White" ForeColor="#000066" HorizontalAlign="Left" />
<SelectedRowStyle BackColor="#669999" Font-Bold="True" ForeColor="White" />
<HeaderStyle BackColor="#006699" Font-Bold="True" ForeColor="White" />
</asp:GridView>
CommandArgument传多值
<asp:ImageButton ID="editImageButton" runat="server" ImageUrl="~/images/bt_edit.gif" CommandArgument='<%#Eval("dict_id")+","+Eval("dict_type")%>' onclick="editImageButton_Click" Height="20" Width="20" />
object[] arg=e.CommandArgument.ToString().Split(','); //注意是单引号
string arg0=arg[0].ToString();
string arg1=arg[1].ToString();
在绑定数据时还可以用后台的函数先进行处理:
如下:
<ItemTemplate>
登录名 :
<%# Eval("login_name")%>
<br /> <br />
真实姓名 :
<%# Eval("real_name")%>
<br /> <br />
管理员类别 :<%# getClassName1(DataBinder.Eval(Container.DataItem,"dbo_type").ToString()) %>
.cs中有代码:
public string getClassName1(string winery_id)
{
string type = "dbo_login_type";
string sql = "select dbo_name from dbo_login_type where dbo_type='" + winery_id + "'";
DataSet ds = new DataSet();
ds = CC.GetDataSet(sql, type);
string ClassName = "";
ClassName = ds.Tables[0].Rows[0][0].ToString();
return ClassName;
}