DataGrid能不能直接进行添加、删除、修改类似于pb中的datawindow，如果不行一般怎么做？希望给点代码

Question

能实现，但很麻烦
我一般是把相应数据提出来，在TextBox中修改

Answer 1

分页：
http://blog.csdn.net/allenting/archive/2005/01/27/271073.aspx
datagrid行排序和筛选 ：
http://blog.csdn.net/allenting/archive/2005/01/27/271072.aspx
datagrid的自定义和隐藏栏：
http://blog.csdn.net/allenting/archive/2005/01/27/271069.aspx
datagrid修改：
<form runat="server">  <ASP:DataGrid id="MyDataGrid" runat="server"
       CellPadding = "2"
       EditItemStyle-BackColor="yellow"
       DataKeyField="ISBN"
       OnEditCommand="DoItemEdit"
       OnUpdateCommand="DoItemUpdate"
       OnCancelCommand="DoItemCancel"
       AutoGenerateColumns="False">    <Columns>      <ASP:BoundColumn DataField="ISBN" HeaderText="ISBN" ReadOnly="True" />      <ASP:TemplateColumn HeaderText="Title">
        <ItemTemplate>
          <ASP:Label Text='<%# DataBinder.Eval(Container.DataItem, "Title") %>' runat="server" />
        </ItemTemplate>
        <EditItemTemplate>
          <ASP:TextBox id="txtTitle" Size="60"
               Text='<%# DataBinder.Eval(Container.DataItem, "Title") %>' runat="server" />
        </EditItemTemplate>
      </ASP:TemplateColumn>      <ASP:BoundColumn DataField="PublicationDate" HeaderText="Published" />      <ASP:EditCommandColumn
           EditText="Edit"
           CancelText="Cancel"
           UpdateText="Update" />    </Columns>  </ASP:DataGrid></form><!---------------------------------------------------------------------------><script language="C#" runat="server"> void Page_Load(Object sender, EventArgs e)
{
if (!Page.IsPostBack)
BindDataGrid(); // create data set and bind to grid control
}
void DoItemEdit(Object objSource, DataGridCommandEventArgs objArgs)
{
lblSQL.Text = ""; // clear text from label that shows SQL statement // set the EditItemIndex property of the grid to this item's index
MyDataGrid.EditItemIndex = objArgs.Item.ItemIndex;
BindDataGrid(); // bind the data and display it
}
void DoItemUpdate(Object objSource, DataGridCommandEventArgs objArgs)
{
// get a reference to the title and publication date text boxes
TextBox objTitleCtrl = (TextBox)objArgs.Item.FindControl("txtTitle");
TextBox objPubDateCtrl = (TextBox)objArgs.Item.Cells[2].Controls[0]; // create a suitable SQL statement and execute it
string strSQL = "UPDATE Booklist SET Title='" + objTitleCtrl.Text + "', "
+ "PublicationDate='" + objPubDateCtrl.Text + "' "
+ "WHERE ISBN='" + MyDataGrid.DataKeys[objArgs.Item.ItemIndex] + "'";
ExecuteSQLStatement(strSQL); // set EditItemIndex property of grid to -1 to switch out of Edit mode
MyDataGrid.EditItemIndex = -1;
BindDataGrid(); // bind the data and display it
}
void DoItemCancel(Object objSource, DataGridCommandEventArgs objArgs)
{
// set EditItemIndex property of grid to -1 to switch out of Edit mode
MyDataGrid.EditItemIndex = -1;
BindDataGrid(); // bind the data and display it
}
void ExecuteSQLStatement(string strSQL)
{
// this is where the SQL statement would be executed against the
// original data source. In this example, we're simply displaying
// the statement in a Label on the page
lblSQL.Text = "<b>The SQL statement that would be executed is:</b><br />" + strSQL;
}
void BindDataGrid()
{
// get connection string from ..\global\connect-strings.ascx user control
string strConnect = ctlConnectStrings.OLEDBConnectionString; // create a SQL statement to select some rows from the database
string strSelect = "SELECT * FROM BookList WHERE ISBN LIKE '%18610025%'"; // create a variable to hold an instance of a DataReader object
OleDbDataReader objDataReader; try
{
// create a new Connection object using the connection string
OleDbConnection objConnect = new OleDbConnection(strConnect); // open the connection to the database
objConnect.Open(); // create a new Command using the connection object and select statement
OleDbCommand objCommand = new OleDbCommand(strSelect, objConnect); // execute the SQL statement against the command to get the DataReader
objDataReader = objCommand.ExecuteReader();
}
catch (Exception objError)
{
// display error details
outError.InnerHtml = "<b>* Error while accessing data</b>.<br />"
+ objError.Message + "<br />" + objError.Source + "<p />";
return; //  and stop execution
} // set the DataSource property and bind the grid
MyDataGrid.DataSource = objDataReader;
MyDataGrid.DataBind();
}</script>

Answer 2

winform的
http://community.csdn.net/Expert/topic/3736/3736668.xml?temp=.3619806

Answer 3

对于一个主从界面，你们也是用textbox吗？

Answer 4

DataGrid里数据不好验证他的完整性！还是提出来处理比较好！就用他来显示数据就行了！

Answer 5

DataGrid 不是DataWindow 如果在最后保存的时候验证还行、如果要用户数据立刻验证那种
好像不行、
其实.net的对象基本上是离散的、不像PB 几乎 DataWindow 就可以主宰一切了、
想打造 比较完美的操作比较 
各种对象相互配合如：Grid //最终显示到客户的控件DataView //[相当于数据库中的试图]可以对数据进行排序、筛选等操作 一个DataTable 可对应多个 View
DataSet //[相当于一个数据库]
DataTable //相当于一个表
BindingManagerBase //管理绑定到相同数据源和数据成员的所有 Binding 对象。
如绑定后的数据现在所在的行, 还有行移动等一些很有用的事件都在在这里.当然进行一系列操作后还需要将数据更新回数据库
需要使用
[Ole|SQL|Oracle]Command //基本封装 sql 语句的操作
[Ole|SQL|Oracle]DataAdapter //使用4个commad 包括更新插入修改等数据库操作
MSDN 里有很多例子.下面就是一个ms-help://MS.VSCC.2003/MS.MSDNQTR.2003FEB.2052/vbcon/html/vbwlkwalkthroughdisplayingdatafromsingletableinwindowsform.htm或在msdn 搜索  窗体中的简单数据访问下面有个例子(copy 后保存成 .eml文件用  Outlook Express 开就好了)Subject: Fw: 
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Answer 6

to：yanyzty(歪打正着),把数据提到textbox里面还是比较好的，但这个提取过程应该怎么做啊？

Answer 7

here
http://www.syncfusion.com/FAQ/WinForms/FAQ_c44c.asp

Answer 8

可以这么做：
在dataGrid的双击事件dataGrid1_DoubleClick中写如下代码  //第一列的数据
this.textBox1.Text = this.dataGrid1[this.dataGrid1.CurrentRowIndex,0].ToString(); 
   //第二列的数据
this.textBox2.Text = this.dataGrid1[this.dataGrid1.CurrentRowIndex,1].ToString();
and so on~~ 然后双击dataGrid1的行首部分  即可取出dataGrid的单元格的值

Answer 9

private void dataGridView_CurrentCellChanged(object sender, System.EventArgs e)
{

string temp = dataGridView[Convert.ToInt32(dataGridView.CurrentCell.RowNumber),0].ToString();
DataAccess data = new DataAccess();
//判断是否点中的是CheckBox列，以保证其值正确更改
if(dataGridView.CurrentCell.ColumnNumber == 12)
{
//判断CheckBox单元格的值，并根据其值更新数据库
if(dataGridView[Convert.ToInt32(dataGridView.CurrentCell.RowNumber),12].ToString() == "False")
{
dataGridView[Convert.ToInt32(dataGridView.CurrentCell.RowNumber),12] = true;
string query_sql = "update accounttype set accflag = '1' where id = '" + temp + "'";
data.ExecuteSQL(query_sql);
}
else if(dataGridView[Convert.ToInt32(dataGridView.CurrentCell.RowNumber),12].ToString() == "True")
{
dataGridView[Convert.ToInt32(dataGridView.CurrentCell.RowNumber),12] = false;
string query_sql = "update accounttype set accflag = '0' where id = '" + temp + "'";
data.ExecuteSQL(query_sql);
}
}
else
{
//选中的不是CheckBox列就跳出此过程
return;
}
}
取值是一样的，你看看吧