我正在尝试使用两个级别实现树视图数据网格。
我的数据绑定如下:
private void BindData()
{
string sqlQuery = "SELECT dept_code, dept_name FROM Department";
conn = new SqlConnection();
conn.ConnectionString = @"Data Source=.\SQLEXPRESS;AttachDbFilename=C:\Users\saher\Documents\TreeTest\TreeDemo\App_Data\TreeData.mdf;Integrated Security=True;User Instance=True";
try
{
if (conn.State == System.Data.ConnectionState.Closed)
{
conn.Open();
}
SqlDataAdapter adapter = new SqlDataAdapter(sqlQuery, conn);
DataSet ds = new DataSet();
adapter.Fill(ds, "DepInfo");
DataGrid1.DataSource = ds;
DataGrid1.DataBind();
}
catch (Exception e)
{
Response.Write("An Error Has occured!");
//Response.End();
Response.Write(e.ToString());
}
finally
{
if (conn.State == System.Data.ConnectionState.Open)
{
conn.Close();
}
}
}
我的数据网格的ItemDataBound函数如下:
protected void DataGrid1_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
{
//If your page size is 10, only 10 sub queries will be done.
if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
{
string newSqlQuery = "SELECT S.staff_name FROM Staff as S where S.dep_code ='" + e.Item.Cells[1].Text + "'";
//Here I am grabbing the additional data and putting it
//into mini datagrids…
//If you wish to just use labels, or other controls, just
//bind the data as you
//wish, and render to html as I did.
DataSet ds = this.RunQuery(newSqlQuery);
DataGrid NewDg = new DataGrid();
NewDg.AutoGenerateColumns = false;
NewDg.Width = Unit.Percentage(100.00);
DataGridTemplate temp = new DataGridTemplate(ListItemType.Item, "staffCol");
TemplateColumn tempCol = new TemplateColumn();
tempCol.ItemTemplate = temp;
BoundColumn bound = new BoundColumn();
bound.DataField = "staff_name";
NewDg.Columns.Add(tempCol);
NewDg.Columns.Add(bound);
NewDg.DataSource = ds;
NewDg.DataBind();
SetProps(NewDg);
subGrids.Add(NewDg); // subGrids is a private ArrayList I have to store the grids.
/**
System.IO.StringWriter sw = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter htw = new System.Web.UI.HtmlTextWriter(sw);
datagrid.RenderControl(htw);
string DivStart = "<DIV id=’uniquename" + e.Item.ItemIndex.ToString() + "‘ style=’DISPLAY: none;’>";
string DivBody = sw.ToString();
string DivEnd = "</DIV>";
string FullDIV = DivStart + DivBody + DivEnd;
int LastCellPosition = e.Item.Cells.Count - 1;
int NewCellPosition = e.Item.Cells.Count - 2;
e.Item.Cells[0].ID = "CellInfo" + e.Item.ItemIndex.ToString();
if (e.Item.ItemType == ListItemType.Item)
{
e.Item.Cells[LastCellPosition].Text = e.Item.Cells[LastCellPosition].Text +
"</td><tr><td bgcolor=’f5f5f5′></td><td colspan=’" +
NewCellPosition + "‘>" + FullDIV;
}
else
{
e.Item.Cells[LastCellPosition].Text = e.Item.Cells[LastCellPosition].Text +
"</td><tr><td bgcolor=’d3d3d3′></td><td colspan=’" +
NewCellPosition + "‘>" + FullDIV;
}
**/
System.IO.StringWriter sw = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter htw = new System.Web.UI.HtmlTextWriter(sw);
datagrid.RenderControl(htw);
string DivStart = "<DIV id=\"uniquename" + e.Item.ItemIndex.ToString() + "\" style=\"display:none\";’>";
string DivBody = sw.ToString();
string DivEnd = "</DIV>";
string FullDIV = DivStart + DivBody + DivEnd;
int LastCellPosition = e.Item.Cells.Count - 1;
int NewCellPosition = e.Item.Cells.Count - 2;
e.Item.Cells[0].ID = "CellInfo" + e.Item.ItemIndex.ToString();
if (e.Item.ItemType == ListItemType.Item)
{
e.Item.Cells[LastCellPosition].Text = e.Item.Cells[LastCellPosition].Text +
"</td><tr id =row" + e.Item.ItemIndex.ToString() + "><td bgcolor=’000000′></td><td colspan=’" +
NewCellPosition + "‘>" + FullDIV;
}
else
{
e.Item.Cells[LastCellPosition].Text = e.Item.Cells[LastCellPosition].Text +
"</td><tr id =row" + e.Item.ItemIndex.ToString() + "><td bgcolor=’d3d3d3′></td><td colspan=’" +
NewCellPosition + "‘>" + FullDIV;
}
//============Set up javascript methods.=============
e.Item.Cells[0].Attributes["onclick"] = "HideShowPanel('uniquename" +
e.Item.ItemIndex.ToString() + "'); ChangePlusMinusText('" +
e.Item.Cells[0].ClientID + "'); SetExpandedDIVInfo('" +
e.Item.Cells[0].ClientID + "','" + this.txtExpandedDivs.ClientID +
"', 'uniquename" + e.Item.ItemIndex.ToString() + "');";
e.Item.Cells[0].Attributes["onmouseover"] = "this.style.cursor='pointer'";
e.Item.Cells[0].Attributes["onmouseout"] = "this.style.cursor='pointer'";
Session["checkSession"] = subGrids; // I store the ArrayList in the session so that I won't loose the dataGrids after a post back.
}
}
我的原始数据网格有一个带复选框的模板列,我生成的数据网格也有两列,一列是人员名称,另一列是带复选框的模板列。 我唯一坚持的是,我想检查我为每一行制作的NewDg girds中的所有复选框。
即使我为网格设置了唯一的ID, FindControl(id)
函数对我的dataGrid也不起作用(找到null)。
这就是为什么我在列表中填充网格并将其存储在会话中。
这是我的checkedChange事件连接到我的DataGrid1(父网格)中AutoPostback = true的复选框。
protected void Check_Change(object s, EventArgs ev)
{
ArrayList gridList = (ArrayList)Session["checkSession"];
foreach (DataGridItem i in DataGrid1.Items)
{
string newSqlQuery = "SELECT S.staff_name FROM Staff as S where S.dep_code ='" + i.Cells[1].Text + "'";
CheckBox b = (CheckBox)i.Cells[2].Controls[1];
if (b.Checked)
{
DataGrid dg = (DataGrid)gridList[0];
foreach (DataGridItem item in dg.Items)
{
CheckBox myBox = (CheckBox)item.Cells[0].Controls[0];
myBox.Checked = true;
}
}
}
}
这不起作用。我调试了,我的List已填充,我有正确数量的datagrids但复选框没有改变。我错过了什么?我需要以一种方式解决这个问题,我可以获取所选项目并将其插入我的数据库中。我想知道为什么不能改变动态生成的dataGrid?
谢谢,
答案 0 :(得分:0)
我通过在项目模板中使用带有数据网格的转发器来做类似的事情。
基于点击转发器中的行/行上的按钮,我将“切换”模板中的面板可见性,在该回发期间显示或隐藏网格,我还将数据绑定子网格。所以我只对可见网格进行数据绑定,而不是所有行中的所有网格。
它看起来像这样(对不起,如果不是从头部撞击这样做的话):
<asp:Repeater ...>
<ItemTemplate>
<tr>
<td> ... </td>
<td>
<asp:Panel ..>
<asp:GridView ...>
...
</asp:GridView>
</asp:Panel>
</td>
</tr>
</ItemTemplate>
</asp:Repeater>
在页面加载时,如果!IsPostback绑定转发器。 在转发器行中的项目的行事件: 1.切换该行可见的面板 2.获取数据 3.传递到行内的网格。 4.数据绑定网格
获取不同的视图只需在转发器的项模板中使用不同的面板。
似乎效果很好,效率非常高。
此外: 我在一个单独的自定义控件中有子网格,以保持代码整洁,并防止大量代码隐藏在文件后面的1个代码中。