关于datagrid更新的问题！

[usxue]

我想在winform中的datagrid中更新我刚修改过的东西，怎么更新？
比如，在一个winform中的datagrid显示数据库中的内容，但是我现在想修改一些内容，更新呢？
谢谢！！！

[cctaiyang]

数据库aa中表 people：People.sql

if exists (select * from dbo.sysobjects where
id = object_id(N'[dbo].[People]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
drop table [dbo].[People]
GO

CREATE TABLE [dbo].[People] (
[pkID] [int] IDENTITY (1, 1) NOT NULL ,
[FirstName] [char] (100) COLLATE Chinese_PRC_CI_AS NULL ,
[LastName] [char] (100) COLLATE Chinese_PRC_CI_AS NULL
) ON [PRIMARY]
GO

EditDataGridCS.aspx

<%@ Page Language="c#" debug="true"%>
<%@ Import Namespace="System.Data"%>
<%@ Import Namespace="System.Data.SqlClient" %>

<script runat="server">

//make first sql
String sql = "";
String strCnn = "Data Source=.;Initial Catalog=aa;User Id=sa;Password=;";
//create a datasource function
public ICollection CreateDataSource () {
SqlConnection conn = new SqlConnection(strCnn);

SqlDataAdapter db_sqladaptor = new SqlDataAdapter(sql,conn);

DataSet ds = new DataSet();
db_sqladaptor.Fill(ds,"MyDataResult");

DataView myView = ds.Tables["MyDataResult"].DefaultView;
return myView;
}


//do page load

public void Page_Load(Object sender, EventArgs e) {
strCnn = "Data Source=.;Initial Catalog=aa;User Id=sa;Password=;";

if (!IsPostBack)
{
sql = "Select * FROM People";
People.DataSource = CreateDataSource();
People.DataBind();
}

}

public void Page_Grid(Object sender, DataGridPageChangedEventArgs e)
{
sql = "Select * FROM People";
// Set CurrentPageIndex to the page the user clicked.
People.CurrentPageIndex = e.NewPageIndex;

// Rebind the data.
People.DataSource = CreateDataSource();
People.DataBind();

}

public void People_Edit(Object sender, DataGridCommandEventArgs e)
{
sql = "Select * FROM People";

People.EditItemIndex = e.Item.ItemIndex;
People.DataSource = CreateDataSource();
People.DataBind();

}

public void People_Cancel(Object sender, DataGridCommandEventArgs e)
{
sql = "Select * FROM People";
People.EditItemIndex = -1;
People.DataSource = CreateDataSource();
People.DataBind();

}

public void People_Update(Object sender, DataGridCommandEventArgs e)
{
string FirstName = ((TextBox)e.Item.Cells[1].Controls[1]).Text;
string LastName = ((TextBox)e.Item.Cells[2].Controls[1]).Text;

SqlConnection connUpdate = new SqlConnection(strCnn);
connUpdate.Open();
String sql_edit = "UPDATE People " +
"SET FirstName = '" + FirstName.Replace("'","''")+ "'," +
"LastName = '" + LastName.Replace("'","''")+ "'" +
" WHERE pkID = " + e.Item.Cells[0].Text;

SqlCommand sqlCommandUpdate = new SqlCommand(sql_edit,connUpdate);
sqlCommandUpdate.ExecuteNonQuery();
connUpdate.Close();

sql = "Select * FROM People";
People.EditItemIndex = -1;
People.DataSource = CreateDataSource();
People.DataBind();

}

public void People_Delete(Object sender, DataGridCommandEventArgs e) {

SqlConnection connDel = new SqlConnection(strCnn);
connDel.Open();
String sql_Del = "DELETE FROM People " +
" WHERE pkID = " + e.Item.Cells[0].Text;

SqlCommand sqlCommandDel = new SqlCommand(sql_Del,connDel);
sqlCommandDel.ExecuteNonQuery();
connDel.Close();

sql = "Select * FROM People";
People.EditItemIndex = -1;
People.DataSource = CreateDataSource();
People.DataBind();

}

</script>

<font face="arial" size="3">
<b>Edit People</b>
</font>
<br>

<form runat="server">

<asp:DataGrid id="People" runat="server"
BorderColor="green"
Width="640"
PageSize="5"
AllowPaging="true"
OnPageIndexChanged="Page_Grid"
BorderWidth="1"
CellPadding="3"
AutoGenerateColumns="false"
ShowHeader="true"
Visible="true"

OnEditCommand="People_Edit"
OnCancelCommand="People_Cancel"
OnUpdateCommand="People_Update"
OnDeleteCommand="People_Delete">

<HeaderStyle BorderColor="White" BackColor="black"
ForeColor="White"
Font-Bold="True"
Font-Name="Arial"
Font-Size="9" HorizontalAlign="Center"/>

<ItemStyle BorderColor=""
BackColor="#FFFFF0"
ForeColor="Black"
Font-Name="Arial"
Font-Size="8"
Font-Bold="False" HorizontalAlign="Center"/>

<EditItemStyle BorderColor=""
BackColor="#FFFFF0"
ForeColor="Black"
Font-Name="Arial"
Font-Size="7"
Font-Bold="False" HorizontalAlign="Center"/>

<PagerStyle Mode="NumericPages" Font-Size="8"/>

<Columns>

<asp:BoundColumn HeaderText="ID" ReadOnly="true" DataField="pkID"/>

<asp:TemplateColumn>

<HeaderTemplate>
<b> First Name </b>
</HeaderTemplate>

<ItemTemplate>
<asp:Label
Text='<%# DataBinder.Eval(Container.DataItem, "FirstName").ToString().Trim() %>'
runat="server"/>
</ItemTemplate>


<EditItemTemplate>
<asp:TextBox id="FirstName" Text='
<%# DataBinder.Eval(Container.DataItem, "FirstName").ToString().Trim() %>'
runat="server" Width="100%"/>
</EditItemTemplate>

</asp:TemplateColumn>

<asp:TemplateColumn>

<HeaderTemplate>
<b> Last Name </b>
</HeaderTemplate>

<ItemTemplate>
<asp:Label
Width="200"
Text='<%# DataBinder.Eval(Container.DataItem, "LastName").ToString().Trim() %>'
runat="server"/>
</ItemTemplate>

<EditItemTemplate>
<asp:TextBox id="LastName" Text='<br>
<%# DataBinder.Eval(Container.DataItem, "LastName").ToString().Trim() %>'
runat="server" Width="100%"/>
</EditItemTemplate>

</asp:TemplateColumn>

<asp:EditCommandColumn
ButtonType="LinkButton"
CancelText="Cancel"
EditText="Edit"
UpdateText="Update" />

<asp:ButtonColumn Text= "Delete" CommandName="Delete"></asp:ButtonColumn>

</Columns>

</asp:DataGrid>

</form>

[usxue]

能不能给我一个WINFORM的例子？？谢了！

[cctaiyang]

试试这个
http://dev.csdn.net/develop/article/24/24148.shtm

[lldwolf]

private SqlConnection conn;
private SqlDataAdapter dataAdapter;
private DataSet saveData;


//装载数据
conn = new SqlConnection("user id=sa;data source=localhost;persist security info=true;initial catalog=Northwind;password=sa");
this.saveData = new DataSet();
string sql = "select top 10 CustomerID, CompanyName from Customers";
this.dataAdapter = new SqlDataAdapter(sql, conn);
this.dataAdapter.Fill(this.saveData);

this.dataGrid1.SetDataBinding(this.saveData, this.saveData.Tables[0].TableName);
conn.Close();


//修改数据..........
......


//保存数据
string sql = "update customers set companyname = @companyname where customerid = @customerid";
SqlCommand cmd = new SqlCommand(sql, this.conn);
SqlParameter parm = cmd.Parameters.Add("@customerid", SqlDbType.NChar, 10, "customerid");
parm.SourceVersion = DataRowVersion.Original;
cmd.Parameters.Add("@companyname", SqlDbType.NVarChar, 80, "companyname");
this.dataAdapter.UpdateCommand = cmd;
this.dataAdapter.Update(this.saveData);
MessageBox.Show("OK！");

[usxue]

我意思是在显示的数据中，我修改后，
怎样的更新数据：da.Update(ds.GetChanges(),comboBox4.SelectedItem.ToString());
怎样的获取我的ds.GetChanges()的dataset？？？

[jiafan123]

重新查迅数据
再绑定datagird

[tajlolo]

要想重新显示，只需要两个步骤：
首选调用Clear方法，然后再Fill。

[wh8254]

楼上地贴了那么多，是Web的吧！晕！
更新数据库后，在作一次邦定不就可以了

可以通过这样：
DataTable dt = new DataTable();
dt = (DataTable)DataGrid.DataSource

然后把dt加到DataSet中，就可以了！

[ywood]

这样的问题不要拿出来问了,用DataAdapter来更新!建议你买一本关于ADO.NET的书来看一看

[qozms]

DataAdapter
update方法

[usxue]

各位老大，你们怎么不看看我提的问题啊？
我是说，在datagrid中修改数据，然后怎样保存这些修改的数据！！！

[lldwolf]

偶的方法难道不行？

[usxue]

搞定了，谢谢各位了