Hi Martin,
From your description, you use the WebForm DataGrid to display and allow
the user to edit the some datas retrieved from the database. However, you
find when the user enter edited data in the datagrid's textbox and update
it, you can't get the new input value at serverside, yes?
From the code you provided, I can't find anything incorrect. Also, I've
made a simple page which use a webform datagrid and when the user hit
"Update" button get the new value in the DataGrid's UpdateCommand event and
it worked well. I've pasted the page's code here, you can also have a test
on your side to see whether it work:
============aspx page==============
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
<title>BindGrid</title>
<meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1">
<meta name="CODE_LANGUAGE" Content="C#">
<meta name="vs_defaultClientScript" content="JavaScript">
<meta name="vs_targetSchema"
content="
http://schemas.microsoft.com/intellisense/ie5">
</HEAD>
<body>
<form id="Form1" method="post" runat="server">
<table width="100%" align="center">
<tr>
<td>
<asp
ataGrid id="dgMain" runat="server" AutoGenerateColumns="False"
AllowSorting="True">
<Columns>
<asp:BoundColumn DataField="index" SortExpression="sort_index"
HeaderText="Index"></asp:BoundColumn>
<asp:BoundColumn DataField="name" SortExpression="sort_name"
HeaderText="Name"></asp:BoundColumn>
<asp:BoundColumn DataField="description"
SortExpression="sort_description"
HeaderText="Description"></asp:BoundColumn>
<asp:EditCommandColumn ButtonType="LinkButton" UpdateText="Update"
HeaderText="Operation" CancelText="Cancel"
EditText="Edit"></asp:EditCommandColumn>
</Columns>
</asp
ataGrid></td>
</tr>
<tr>
<td>
<asp:Button id="btnChangeSortText" runat="server" Text="Change Sort
Text"></asp:Button></td>
</tr>
<tr>
<td></td>
</tr>
</table>
</form>
</body>
</HTML>
==========code behind classs=========
public class BindGrid : System.Web.UI.Page
{
protected System.Web.UI.WebControls.Button btnChangeSortText;
protected System.Web.UI.WebControls.DataGrid dgMain;
private void Page_Load(object sender, System.EventArgs e)
{
if(!IsPostBack)
{
Load_Data();
Bind_Data();
Response.Write("<br>" + Test.name);
}
}
protected void Load_Data()
{
DataTable tb = new DataTable();
tb.Columns.Add("index");
tb.Columns.Add("name");
tb.Columns.Add("description");
tb.Columns.Add("type1",typeof(string));
tb.Columns.Add("type2",Type.GetType("System.String"));
for(int i=1;i<=10;i++)
{
DataRow row = tb.NewRow();
row["index"] = i.ToString();
row["name"] = "Name" + i.ToString();
row["description"] = "Description" + i.ToString();
tb.Rows.Add(row);
}
Session["TEMP_DATA"] = tb;
}
protected void Bind_Data()
{
DataTable tb = (DataTable)Session["TEMP_DATA"];
dgMain.DataSource = tb;
dgMain.DataBind();
((BoundColumn)dgMain.Columns[0]).ReadOnly = true;
}
#region Web Form Designer generated code
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: This call is required by the ASP.NET Web Form Designer.
//
InitializeComponent();
base.OnInit(e);
}
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.dgMain.CancelCommand += new
System.Web.UI.WebControls.DataGridCommandEventHandler(this.dgMain_CancelComm
and);
this.dgMain.EditCommand += new
System.Web.UI.WebControls.DataGridCommandEventHandler(this.dgMain_EditComman
d);
this.dgMain.SortCommand += new
System.Web.UI.WebControls.DataGridSortCommandEventHandler(this.dgMain_SortCo
mmand);
this.dgMain.UpdateCommand += new
System.Web.UI.WebControls.DataGridCommandEventHandler(this.dgMain_UpdateComm
and);
this.dgMain.ItemDataBound += new
System.Web.UI.WebControls.DataGridItemEventHandler(this.dgMain_ItemDataBound
);
this.btnChangeSortText.Click += new
System.EventHandler(this.btnChangeSortText_Click);
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
private void dgMain_UpdateCommand(object source,
System.Web.UI.WebControls.DataGridCommandEventArgs e)
{
TextBox txtName = (TextBox)e.Item.Cells[1].Controls[0];
TextBox txtDesc = (TextBox)e.Item.Cells[2].Controls[0];
Response.Write("<br>UpdateName: " + txtName.Text);
Response.Write("<br>UpdateDescription: " + txtDesc.Text);
dgMain.EditItemIndex = -1;
Bind_Data();
}
private void dgMain_CancelCommand(object source,
System.Web.UI.WebControls.DataGridCommandEventArgs e)
{
dgMain.EditItemIndex = -1;
Bind_Data();
}
private void dgMain_EditCommand(object source,
System.Web.UI.WebControls.DataGridCommandEventArgs e)
{
dgMain.EditItemIndex = e.Item.ItemIndex;
Bind_Data();
}
private void dgMain_SortCommand(object source,
System.Web.UI.WebControls.DataGridSortCommandEventArgs e)
{
Response.Write("<br>" + e.SortExpression);
Bind_Data();
}
private void btnChangeSortText_Click(object sender, System.EventArgs e)
{
dgMain.Columns[1].HeaderText = "fdsaf";
Bind_Data();
}
private void dgMain_ItemDataBound(object sender,
System.Web.UI.WebControls.DataGridItemEventArgs e)
{
if(e.Item.ItemType == ListItemType.Header)
{
Response.Write("<br>" +
e.Item.Cells[1].Controls[0].GetType().ToString());
}
}
}
========================================
Hope helps. Thanks.
Regards,
Steven Cheng
Microsoft Online Support
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