Asp.net GridView行命令事件和保存文本
我已设置GridView:Asp.net GridView行命令事件和保存文本,asp.net,gridview,postback,Asp.net,Gridview,Postback,我已设置GridView: <asp:GridView id="GridView1" Runat="server" AutoGenerateColumns="False" OnRowCommand = "GridView1_RowCommand" EnableViewState="true"> <Columns> <asp:TemplateField HeaderText="Delete" ItemStyle-HorizontalAlign="C
<asp:GridView id="GridView1" Runat="server" AutoGenerateColumns="False" OnRowCommand = "GridView1_RowCommand" EnableViewState="true">
<Columns>
<asp:TemplateField HeaderText="Delete" ItemStyle-HorizontalAlign="Center">
<ItemTemplate><asp:Button runat="server" ID="Delete" ImageUrl="~/images/Close.gif" CommandName="DeleteRow" CommandArgument="<%# CType(Container,GridViewRow).RowIndex %>"/></ItemTemplate></asp:TemplateField>
<asp:TemplateField HeaderText="Comment" ItemStyle-Width="175px">
<ItemTemplate><textarea class="raTextBox" id="txtItemComment" rows="4" cols="30"></textarea></ItemTemplate></asp:TemplateField>
</Columns>
</asp:GridView>
GridView在页面加载时进行数据绑定,如下所示:
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
If Not IsPostBack Then
Session("CalledModule") = "RCMT0021"
Else
With ViewState
_intRepor = CInt(.Item("Report"))
End With
End If
DataBind() //Gridview Load
End Sub
Public Sub DataBind()
Dim clsDatabase As New clsDatabase
Dim cmd As New OleDbCommand()
Try
cmd.CommandText = "SELECT A, B FROM WHERE C = ? ORDER BY A"
Dim report As New OleDbParameter("@Report", _intReportNumber)
cmd.Parameters.Add(report)
cmd.Connection = clsDatabase.Open_DB()
Dim dReader As OleDbDataReader
dReader = cmd.ExecuteReader(CommandBehavior.CloseConnection)
Dim dt As New DataTable
dt.Columns.Add(New DataColumn("PictureURL", GetType(String)))
dt.Columns.Add(New DataColumn("Seq", GetType(Int16)))
dt.Columns.Add(New DataColumn("ReportNumber", GetType(String)))
Do While (dReader.Read())
Dim dr As DataRow = dt.NewRow()
_strComments = dReader(0).ToString
dr("Seq") = dReader.GetInt16(1)
dr("PictureURL") = "GetImages.aspx?report=" + _intReportNumber.ToString + "&seq=" + dReader.GetInt16(1).ToString
dr("ReportNumber") = _intReportNumber.ToString
dt.Rows.Add(dr)
Loop
GridView1.DataSource = dt
GridView1.DataBind()
Catch err As Exception
End Try
End Sub
我的问题是:
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
If Not IsPostBack Then
Session("CalledModule") = "RCMT0021"
Else
With ViewState
_intRepor = CInt(.Item("Report"))
End With
End If
DataBind() //Gridview Load
End Sub
Public Sub DataBind()
Dim clsDatabase As New clsDatabase
Dim cmd As New OleDbCommand()
Try
cmd.CommandText = "SELECT A, B FROM WHERE C = ? ORDER BY A"
Dim report As New OleDbParameter("@Report", _intReportNumber)
cmd.Parameters.Add(report)
cmd.Connection = clsDatabase.Open_DB()
Dim dReader As OleDbDataReader
dReader = cmd.ExecuteReader(CommandBehavior.CloseConnection)
Dim dt As New DataTable
dt.Columns.Add(New DataColumn("PictureURL", GetType(String)))
dt.Columns.Add(New DataColumn("Seq", GetType(Int16)))
dt.Columns.Add(New DataColumn("ReportNumber", GetType(String)))
Do While (dReader.Read())
Dim dr As DataRow = dt.NewRow()
_strComments = dReader(0).ToString
dr("Seq") = dReader.GetInt16(1)
dr("PictureURL") = "GetImages.aspx?report=" + _intReportNumber.ToString + "&seq=" + dReader.GetInt16(1).ToString
dr("ReportNumber") = _intReportNumber.ToString
dt.Rows.Add(dr)
Loop
GridView1.DataSource = dt
GridView1.DataBind()
Catch err As Exception
End Try
End Sub
因此,GridView基本上有三个可见列—注释字段、图片字段和带有删除按钮(图像)的字段,用于从数据库中删除图片(以及注释,如果有的话)。第四列是隐藏列,用于跟踪图像的图像ID。为了简单起见,我没有包括图片和其他专栏
- 用户可以添加注释,当他单击“保存更改”按钮时,应为图片保存相应的注释
- 选择图像”打开一个ModalDialogBox,使用户可以选择图像。关闭后,它会导致回发,并重新绑定gridview以显示用户刚刚选择的图像。因此,我需要GridView在回发时重新绑定,或者找到一种解决方法。
- 删除图像按钮(在gridview中)应从数据库中删除图像和注释
textarea
有runat=“server”
)
aspx.cs:
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
BindGrid();
}
}
protected void BindGrid()
{
var items = new List<string>();
for (int i = 0; i < 10; i++)
{
items.Add(i + ";comment" + i.ToString());
}
GridView1.DataSource = items;
GridView1.DataBind();
}
protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "DeleteRow")
{
var idx = Convert.ToInt32(e.CommandArgument);
var cmt = GridView1.Rows[idx].FindControl("txtItemComment") as System.Web.UI.HtmlControls.HtmlTextArea;
cmt.Value = DateTime.Now.ToString();
}
}
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
var item = e.Row.DataItem.ToString().Split(";".ToCharArray());
var del = e.Row.FindControl("Delete") as Button;
del.CommandName = "DeleteRow";
del.CommandArgument = item[0];
var cmt = e.Row.FindControl("txtItemComment") as System.Web.UI.HtmlControls.HtmlTextArea;
cmt.Value = item[1];
}
}
受保护的无效页面加载(对象发送方,事件参数e)
{
如果(!Page.IsPostBack)
{
BindGrid();
}
}
受保护的void BindGrid()
{
var items=新列表();
对于(int i=0;i<10;i++)
{
添加(i+“注释”+i.ToString());
}
GridView1.DataSource=项目;
GridView1.DataBind();
}
受保护的void GridView1_row命令(对象发送方,GridViewCommandEventArgs e)
{
如果(e.CommandName==“DeleteRow”)
{
var idx=Convert.ToInt32(e.CommandArgument);
var cmt=GridView1.Rows[idx].FindControl(“txtItemComment”)作为System.Web.UI.HtmlControls.HtmlTextArea;
cmt.Value=DateTime.Now.ToString();
}
}
受保护的void GridView1_RowDataBound(对象发送方,GridViewRowEventArgs e)
{
如果(e.Row.RowType==DataControlRowType.DataRow)
{
var item=e.Row.DataItem.ToString().Split(“;”.ToCharArray());
var del=e.Row.FindControl(“删除”)作为按钮;
del.CommandName=“DeleteRow”;
del.CommandArgument=项[0];
var cmt=e.Row.FindControl(“txtItemComment”)作为System.Web.UI.HtmlControls.HtmlTextArea;
cmt.值=项目[1];
}
}
试试这个结构
aspx页面:(注意textarea
有runat=“server”
)
aspx.cs:
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
BindGrid();
}
}
protected void BindGrid()
{
var items = new List<string>();
for (int i = 0; i < 10; i++)
{
items.Add(i + ";comment" + i.ToString());
}
GridView1.DataSource = items;
GridView1.DataBind();
}
protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "DeleteRow")
{
var idx = Convert.ToInt32(e.CommandArgument);
var cmt = GridView1.Rows[idx].FindControl("txtItemComment") as System.Web.UI.HtmlControls.HtmlTextArea;
cmt.Value = DateTime.Now.ToString();
}
}
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
var item = e.Row.DataItem.ToString().Split(";".ToCharArray());
var del = e.Row.FindControl("Delete") as Button;
del.CommandName = "DeleteRow";
del.CommandArgument = item[0];
var cmt = e.Row.FindControl("txtItemComment") as System.Web.UI.HtmlControls.HtmlTextArea;
cmt.Value = item[1];
}
}
受保护的无效页面加载(对象发送方,事件参数e)
{
如果(!Page.IsPostBack)
{
BindGrid();
}
}
受保护的void BindGrid()
{
var items=新列表();
对于(int i=0;i<10;i++)
{
添加(i+“注释”+i.ToString());
}
GridView1.DataSource=项目;
GridView1.DataBind();
}
受保护的void GridView1_row命令(对象发送方,GridViewCommandEventArgs e)
{
如果(e.CommandName==“DeleteRow”)
{
var idx=Convert.ToInt32(e.CommandArgument);
var cmt=GridView1.Rows[idx].FindControl(“txtItemComment”)作为System.Web.UI.HtmlControls.HtmlTextArea;
cmt.Value=DateTime.Now.ToString();
}
}
受保护的void GridView1_RowDataBound(对象发送方,GridViewRowEventArgs e)
{
如果(e.Row.RowType==DataControlRowType.DataRow)
{
var item=e.Row.DataItem.ToString().Split(“;”.ToCharArray());
var del=e.Row.FindControl(“删除”)作为按钮;
del.CommandName=“DeleteRow”;
del.CommandArgument=项[0];
var cmt=e.Row.FindControl(“txtItemComment”)作为System.Web.UI.HtmlControls.HtmlTextArea;
cmt.值=项目[1];
}
}
你试过什么?您是否将断点放在GridView1_row命令(…)中?在您的代码中,没有
保存更改
按钮。另外,请发布gridview的数据绑定代码。这将有助于解决RowCommand
问题。如果没有,请尝试将DataBind()函数放入其中postback@tunmisefasipe:是的,它从未到达断点。@karthi:我不能这样做,因为当我加载页面时,以及当ModalDialog关闭时,gridview需要进行数据绑定,然后在页面上回发。你试过什么?您是否将断点放在GridView1_row命令(…)中?在您的代码中,没有保存更改
按钮。另外,请发布gridview的数据绑定代码。这将有助于解决RowCommand
问题。如果没有,请尝试将DataBind()函数放入其中postback@tunmisefasipe:是的,它从未到达断点。@karthi:我不能这样做,因为当我加载页面时,以及当ModalDialog关闭时,gridview需要进行数据绑定,并在页面上回发。我更新了帖子,为您提供有关我的问题的更多信息。注释框将是用户输入字段,每个字段随附一张图片,用于对该图片进行注释。它们都需要在c上更新