我在如何为GridView停用Delete Button rowindex = 0时遇到问题。
其次，我想Delete点击Row Delete Button GridView。
我的DataSource仅用于获取数据。我使用k创建新行，并将其作为GridView的{{1}}投放。
<asp:gridview ID="Gridview1" runat="server" ShowFooter="true" AutoGenerateColumns="false" AutoGenerateDeleteButton="true" OnRowDeleting="Gridview1_RowDeleting">
<Columns>
<asp:BoundField DataField="RowNumber" HeaderText="Row Number" />
<asp:TemplateField HeaderText="WorkDone">
<ItemTemplate>
<asp:TextBox ID="txtWorkDone" runat="server"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Total Time spent">
<ItemTemplate>
<asp:DropDownList runat="server" ID="ddlHours">
<asp:ListItem Selected="True">1</asp:ListItem>
<asp:ListItem>2</asp:ListItem>
<asp:ListItem>3</asp:ListItem>
<asp:ListItem>4</asp:ListItem>
<asp:ListItem>5</asp:ListItem>
<asp:ListItem>6</asp:ListItem>
<asp:ListItem>7</asp:ListItem>
<asp:ListItem>8</asp:ListItem>
<asp:ListItem>9</asp:ListItem>
</asp:DropDownList>
</ItemTemplate>
<FooterStyle HorizontalAlign="Right" />
<FooterTemplate>
<asp:Button ID="btnAddNewRow" runat="server" Text="Add New Row"
onclick="btnAddNewRow_Click" CausesValidation="false"/>
</FooterTemplate>
</asp:TemplateField>
</Columns>
</asp:gridview>
但我无法弄清楚在事件RowDeleting
protected void Gridview1_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
//Here i am not getting
}
private void SetInitialRow()
{
DataTable dt = new DataTable();
DataRow dr = null;
dt.Columns.Add(new DataColumn("RowNumber", typeof(string)));
dt.Columns.Add(new DataColumn("WorkDone", typeof(string)));
dt.Columns.Add(new DataColumn("TimeSpent", typeof(string)));
dr = dt.NewRow();
dr["RowNumber"] = 1;
dr["WorkDone"] = string.Empty;
dr["TimeSpent"] = string.Empty;
dt.Rows.Add(dr);
//Store the DataTable in ViewState
ViewState["CurrentTable"] = dt;
Gridview1.DataSource = dt;
Gridview1.DataBind();
foreach(GridViewRow row in Gridview1.Rows)
{
if(row.RowIndex == 0)
{
//Delete button must be disabled
}
}
}
private void AddNewRowToGrid()
{
int rowIndex = 0;
if (ViewState["CurrentTable"] != null)
{
DataTable dtCurrentTable = (DataTable)ViewState["CurrentTable"];
DataRow drCurrentRow = null;
if (dtCurrentTable.Rows.Count > 0)
{
for (int i = 1; i <= dtCurrentTable.Rows.Count; i++)
{
//extract the TextBox values
TextBox box1 = (TextBox)Gridview1.Rows[rowIndex].Cells[1].FindControl("txtWorkDone");
DropDownList box2 = (DropDownList)Gridview1.Rows[rowIndex].Cells[2].FindControl("ddlHours");
drCurrentRow = dtCurrentTable.NewRow();
drCurrentRow["RowNumber"] = i + 1;
dtCurrentTable.Rows[i - 1]["WorkDone"] = box1.Text;
dtCurrentTable.Rows[i - 1]["TimeSpent"] = box2.SelectedItem.Text;
rowIndex++;
}
dtCurrentTable.Rows.Add(drCurrentRow);
ViewState["CurrentTable"] = dtCurrentTable;
Gridview1.DataSource = dtCurrentTable;
Gridview1.DataBind();
}
}
else
{
Response.Write("ViewState is null");
}
//Set Previous Data on Postbacks
SetPreviousData();
}
private void SetPreviousData()
{
int rowIndex = 0;
if (ViewState["CurrentTable"] != null)
{
DataTable dt = (DataTable)ViewState["CurrentTable"];
if (dt.Rows.Count > 0)
{
for (int i = 0; i < dt.Rows.Count; i++)
{
TextBox box1 = (TextBox)Gridview1.Rows[rowIndex].Cells[1].FindControl("txtWorkDone");
DropDownList box2 = (DropDownList)Gridview1.Rows[rowIndex].Cells[2].FindControl("ddlHours");
box1.Text = dt.Rows[i]["WorkDone"].ToString();
box2.Text = dt.Rows[i]["TimeSpent"].ToString();
rowIndex++;
}
}
}
}
请任何人帮忙!!
答案 0 :(得分：0)
试试这个
#region"VCoupons"
private void SetInitialRow()
{
DataTable dt = new DataTable();
DataRow dr = null;
//dt.Columns.Add(new DataColumn("RowNumber", typeof(string)));
dt.Columns.Add(new DataColumn("Column1", typeof(string)));
dt.Columns.Add(new DataColumn("Column2", typeof(string)));
dt.Columns.Add(new DataColumn("Column3", typeof(string)));
dt.Columns.Add(new DataColumn("Column4", typeof(string)));
dr = dt.NewRow();
// dr["RowNumber"] = 1;
dt.Rows.Add(dr);
dt.TableName = "Coupons";
//Store the DataTable in ViewState
ViewState["dt_CouponData"] = dt;
GridviewCoupon.DataSource = dt;
GridviewCoupon.DataBind();
}
protected void ButtonAdd_Click(object sender, EventArgs e)
{
AddNewRowToGrid();
}
private void AddNewRowToGrid()
{
int rowIndex = 0;
if (ViewState["dt_CouponData"] != null)
{
DataTable dt_CouponData = (DataTable)ViewState["dt_CouponData"];
DataRow drCurrentRow = null;
if (dt_CouponData.Rows.Count > 0)
{
for (int i = 1; i <= dt_CouponData.Rows.Count; i++)
{
//extract the TextBox values
TextBox box1 = (TextBox)GridviewCoupon.Rows[rowIndex].Cells[1].FindControl("TextBox1");
TextBox box2 = (TextBox)GridviewCoupon.Rows[rowIndex].Cells[2].FindControl("TextBox2");
TextBox box3 = (TextBox)GridviewCoupon.Rows[rowIndex].Cells[3].FindControl("TextBox3");
TextBox box4 = (TextBox)GridviewCoupon.Rows[rowIndex].Cells[4].FindControl("TextBox4");
drCurrentRow = dt_CouponData.NewRow();
//drCurrentRow["RowNumber"] = i + 1;
drCurrentRow["Column1"] = box1.Text;
drCurrentRow["Column2"] = box2.Text;
drCurrentRow["Column3"] = box3.Text;
drCurrentRow["Column4"] = box4.Text;
rowIndex++;
}
//add new row to DataTable
dt_CouponData.Rows.Add(drCurrentRow);
//Store the current data to ViewState
ViewState["dt_CouponData"] = dt_CouponData;
//Rebind the Grid with the current data
GridviewCoupon.DataSource = dt_CouponData;
GridviewCoupon.DataBind();
}
}
else
{
Response.Write("ViewState is null");
}
DataTable dt = (DataTable)ViewState["dt_CouponData"];
//Set Previous Data on Postbacks
int n = dt.Rows.Count;
if (dt.Rows[0]["Column1"].ToString() == "" && dt.Rows[0]["Column2"].ToString() == "" && dt.Rows[0]["Column3"].ToString() == "" && dt.Rows[0]["Column4"].ToString() == "")
{
SetPreviousData();
}
else
{
SetData();
}
}
private void SetPreviousData()
{
int rowIndex = 0;
if (ViewState["dt_CouponData"] != null)
{
DataTable dt = (DataTable)ViewState["dt_CouponData"];
if (dt.Rows.Count > 0)
{
for (int i = 1; i < dt.Rows.Count; i++)
{
TextBox box1 = (TextBox)GridviewCoupon.Rows[rowIndex].Cells[1].FindControl("TextBox1");
TextBox box2 = (TextBox)GridviewCoupon.Rows[rowIndex].Cells[2].FindControl("TextBox2");
TextBox box3 = (TextBox)GridviewCoupon.Rows[rowIndex].Cells[3].FindControl("TextBox3");
TextBox box4 = (TextBox)GridviewCoupon.Rows[rowIndex].Cells[3].FindControl("TextBox4");
box1.Text = dt.Rows[i]["Column1"].ToString();
box2.Text = dt.Rows[i]["Column2"].ToString();
box3.Text = dt.Rows[i]["Column3"].ToString();
box4.Text = dt.Rows[i]["Column4"].ToString();
rowIndex++;
}
}
}
}
private void SetData()
{
int rowIndex = 0;
if (ViewState["dt_CouponData"] != null)
{
DataTable dt = (DataTable)ViewState["dt_CouponData"];
int n = dt.Rows.Count;
for (int i = 0; i < n - 1; i++)
{
for (int j = 0; j < n - i - 1; j++)
{
if (dt.Rows[j]["Column1"].ToString() == dt.Rows[j + 1]["Column1"].ToString() && dt.Rows[j]["Column2"].ToString() == dt.Rows[j + 1]["Column2"].ToString() && dt.Rows[j]["Column3"].ToString() == dt.Rows[j + 1]["Column3"].ToString() && dt.Rows[j]["Column4"].ToString() == dt.Rows[j + 1]["Column4"].ToString())
{
dt.Rows[j + 1]["Column1"] = "";
dt.Rows[j + 1]["Column2"] = "";
dt.Rows[j + 1]["Column3"] = "";
dt.Rows[j + 1]["Column4"] = "";
}
}
}
if (dt.Rows[n - 2]["Column1"].ToString() == "" && dt.Rows[n - 2]["Column2"].ToString() == "" && dt.Rows[n - 2]["Column3"].ToString() == "" && dt.Rows[n - 2]["Column4"].ToString() == "")
{
dt.Rows[n - 2]["Column1"] = dt.Rows[n - 1]["Column1"];
dt.Rows[n - 2]["Column2"] = dt.Rows[n - 1]["Column2"];
dt.Rows[n - 2]["Column3"] = dt.Rows[n - 1]["Column3"];
dt.Rows[n - 2]["Column4"] = dt.Rows[n - 1]["Column4"];
dt.Rows[n - 1]["Column1"]="";
dt.Rows[n - 1]["Column2"]="";
dt.Rows[n - 1]["Column3"]="";
dt.Rows[n - 1]["Column4"]="";
}
if (dt.Rows.Count > 0)
{
for (int i = 0; i < dt.Rows.Count - 1; i++)
{
TextBox box1 = (TextBox)GridviewCoupon.Rows[i].Cells[1].FindControl("TextBox1");
TextBox box2 = (TextBox)GridviewCoupon.Rows[i].Cells[2].FindControl("TextBox2");
TextBox box3 = (TextBox)GridviewCoupon.Rows[i].Cells[3].FindControl("TextBox3");
TextBox box4 = (TextBox)GridviewCoupon.Rows[i].Cells[3].FindControl("TextBox4");
box1.Text = dt.Rows[i]["Column1"].ToString();
box2.Text = dt.Rows[i]["Column2"].ToString();
box3.Text = dt.Rows[i]["Column3"].ToString();
box4.Text = dt.Rows[i]["Column4"].ToString();
rowIndex++;
}
}
int b = dt.Rows.Count;
//Rebind the Grid with the current data
}
}
private void SaveCoupons()
{
//int rowIndex = 0;
if (ViewState["dt_CouponData"] != null)
{
DataTable dt_CouponData = (DataTable)ViewState["dt_CouponData"];
DataRow drCurrentRow = null;
if (dt_CouponData.Rows.Count > 0)
{
for (int i = 0; i < dt_CouponData.Rows.Count; i++)
{
//extract the TextBox values
TextBox box1 = (TextBox)GridviewCoupon.Rows[i].Cells[1].FindControl("TextBox1");
TextBox box2 = (TextBox)GridviewCoupon.Rows[i].Cells[2].FindControl("TextBox2");
TextBox box3 = (TextBox)GridviewCoupon.Rows[i].Cells[3].FindControl("TextBox3");
TextBox box4 = (TextBox)GridviewCoupon.Rows[i].Cells[4].FindControl("TextBox4");
drCurrentRow = dt_CouponData.NewRow();
// drCurrentRow["RowNumber"] = i + 1;
drCurrentRow["Column1"] = box1.Text;
drCurrentRow["Column2"] = box2.Text;
drCurrentRow["Column3"] = box3.Text;
drCurrentRow["Column4"] = box4.Text;
// rowIndex++;
}
dt_CouponData.Rows.Add(drCurrentRow);
//add new row to DataTable
//Store the current data to ViewState
ViewState["dt_CouponData"] = dt_CouponData;
}
}
else
{
Response.Write("ViewState is null");
}
}
private void Save()
{
int rowIndex = 0;
if (ViewState["dt_CouponData"] != null)
{
DataTable dt_CouponData = (DataTable)ViewState["dt_CouponData"];
DataRow drCurrentRow = null;
if (dt_CouponData.Rows.Count > 0)
{
for (int i = 0; i < dt_CouponData.Rows.Count; i++)
{
//extract the TextBox values
TextBox box1 = (TextBox)GridviewCoupon.Rows[i].Cells[1].FindControl("TextBox1");
TextBox box2 = (TextBox)GridviewCoupon.Rows[i].Cells[2].FindControl("TextBox2");
TextBox box3 = (TextBox)GridviewCoupon.Rows[i].Cells[3].FindControl("TextBox3");
TextBox box4 = (TextBox)GridviewCoupon.Rows[i].Cells[4].FindControl("TextBox4");
drCurrentRow = dt_CouponData.NewRow();
//drCurrentRow["RowNumber"] = i + 1;
drCurrentRow["Column1"] = box1.Text;
drCurrentRow["Column2"] = box2.Text;
drCurrentRow["Column3"] = box3.Text;
drCurrentRow["Column4"] = box4.Text;
// rowIndex++;
}
//add new row to DataTable
dt_CouponData.Rows.Add(drCurrentRow);
int n = dt_CouponData.Rows.Count;
if (dt_CouponData.Rows[n - 2]["Column1"].ToString() == "" && dt_CouponData.Rows[n - 2]["Column2"].ToString() == "" && dt_CouponData.Rows[n - 2]["Column3"].ToString() == "" && dt_CouponData.Rows[n - 2]["Column4"].ToString() == "")
{
dt_CouponData.Rows[n - 2]["Column1"] = dt_CouponData.Rows[n - 1]["Column1"];
dt_CouponData.Rows[n - 2]["Column2"] = dt_CouponData.Rows[n - 1]["Column2"];
dt_CouponData.Rows[n - 2]["Column3"] = dt_CouponData.Rows[n - 1]["Column3"];
dt_CouponData.Rows[n - 2]["Column4"] = dt_CouponData.Rows[n - 1]["Column4"];
dt_CouponData.Rows[n - 1].Delete();
}
int b = dt_CouponData.Rows.Count;
int a = b - 1;
if (dt_CouponData.Rows[a]["Column1"].ToString() == dt_CouponData.Rows[a - 1]["Column1"].ToString() && dt_CouponData.Rows[a]["Column2"].ToString() == dt_CouponData.Rows[a - 1]["Column2"].ToString() && dt_CouponData.Rows[a]["Column3"].ToString() == dt_CouponData.Rows[a - 1]["Column3"].ToString() && dt_CouponData.Rows[a]["Column4"].ToString() == dt_CouponData.Rows[a - 1]["Column4"].ToString())
{
dt_CouponData.Rows[a].Delete();
}
//Store the current data to ViewState
ViewState["dt_CouponData"] = dt_CouponData;
}
}
else
{
Response.Write("ViewState is null");
}
}
private void SetPrevious()
{
int rowIndex = 0;
if (ViewState["dt_CouponData"] != null)
{
DataTable dt = (DataTable)ViewState["dt_CouponData"];
int o = 1;
int b = dt.Rows.Count;
int a = b - 1;
GridviewCoupon.DataSource = dt;
if (dt.Rows[0]["Column2"].ToString() == "")
{
dt.Rows[0].Delete();
}
//else if (dt.Rows[a]["Column1"].ToString() == dt.Rows[a - 1]["Column1"].ToString() && dt.Rows[a]["Column2"].ToString() == dt.Rows[a - 1]["Column2"].ToString() && dt.Rows[a]["Column3"].ToString() == dt.Rows[a - 1]["Column3"].ToString() && dt.Rows[a]["Column4"].ToString() == dt.Rows[a - 1]["Column4"].ToString())
//{
// dt.Rows[a].Delete();
//}
//if (dt.Rows[o]["Column1"].ToString() == dt.Rows[o - 1]["Column1"].ToString() && dt.Rows[o]["Column2"].ToString() == dt.Rows[o - 1]["Column2"].ToString() && dt.Rows[o]["Column3"].ToString() == dt.Rows[o - 1]["Column3"].ToString() && dt.Rows[o]["Column4"].ToString() == dt.Rows[o - 1]["Column4"].ToString())
//{
// dt.Rows[0].Delete();
//}
GridviewCoupon.DataBind();
if (dt.Rows.Count > 0)
{
int j = dt.Rows.Count;
ViewState["dt_CouponData"] = dt;
for (int i = dt.Rows.Count - 1; i >= 0; i--)
{
TextBox box1 = (TextBox)GridviewCoupon.Rows[i].Cells[1].FindControl("TextBox1");
TextBox box2 = (TextBox)GridviewCoupon.Rows[i].Cells[2].FindControl("TextBox2");
TextBox box3 = (TextBox)GridviewCoupon.Rows[i].Cells[3].FindControl("TextBox3");
TextBox box4 = (TextBox)GridviewCoupon.Rows[i].Cells[4].FindControl("TextBox4");
box1.Text = dt.Rows[i]["Column1"].ToString();
box2.Text = dt.Rows[i]["Column2"].ToString();
box3.Text = dt.Rows[i]["Column3"].ToString();
box4.Text = dt.Rows[i]["Column4"].ToString();
//if (rowIndex<dt.Rows.Count-1)
//{
// rowIndex++;
//}
}
}
}
}
protected void GridviewCoupon_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "More")
{
objENT = new ENT();
DataTable dt = (DataTable)ViewState["dt_CouponData"];
int index = Convert.ToInt32(e.CommandArgument.ToString());
if (dt.Rows[0]["Column1"].ToString() == "" && dt.Rows[0]["Column2"].ToString() == "" && dt.Rows[0]["Column3"].ToString() == "" && dt.Rows[0]["Column4"].ToString() == "")
{
index++;
}
Save();
int count = dt.Rows.Count;
if (count == index)
{
dt.Rows[index - 1].Delete();
}
else
{
dt.Rows[index].Delete();
}
ViewState["dt_CouponData"] = dt;
SetPrevious();
}
}
protected void GridviewCoupon_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
Button Delete = (Button)e.Row.FindControl("btnDelete");
DataRowView dr = e.Row.DataItem as DataRowView;
int index = e.Row.RowIndex;
if (index == 0)
{
Delete.Visible = false;
}
else
{
Delete.Visible = true;
}
}
}
#endregion
<div class="row" style="margin-top: 2%">
<div class="col-sm-1"></div>
<div class="container-fluid col-sm-10">
<asp:GridView ID="GridviewCoupon" OnRowEditing="GridviewCoupon_RowEditing" OnRowDataBound="GridviewCoupon_RowDataBound" OnRowCommand="GridviewCoupon_RowCommand" runat="server" Enabled="false" Style="text-align: center" ShowFooter="true" Width="99%"
AutoGenerateColumns="false">
<Columns>
<%--<asp:BoundField DataField="RowNumber" HeaderText="Sr No" HeaderStyle-BackColor="#99CCCC" />--%>
<%-- <asp:TemplateField HeaderText="Sr No" HeaderStyle-BackColor="#99CCCC">
<ItemTemplate>
<asp:Label ID="txtbox0" Text='<%# Bind("RowNumber")%>' runat="server"></asp:Label>
</ItemTemplate>
</asp:TemplateField>--%>
<%--<asp:TemplateField HeaderText="Survey Number" HeaderStyle-BackColor="#99CCCC">
<ItemTemplate>
<asp:TextBox ID="TextBoxS" CssClass="form-control" required="required" runat="server"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>--%>
<asp:TemplateField HeaderText="Coupon Code" HeaderStyle-BackColor="#99CCCC">
<ItemTemplate>
<asp:TextBox ID="TextBox1" required="required" CssClass="form-control" runat="server"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Coupon Description" HeaderStyle-BackColor="#99CCCC">
<ItemTemplate>
<asp:TextBox ID="TextBox2" MaxLength="250" required="required" CssClass="form-control" runat="server"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Start Date" HeaderStyle-BackColor="#99CCCC">
<ItemTemplate>
<asp:TextBox ID="TextBox3" required="required" placeholder="DD/MMM/YYYY" CssClass="form-control cal" runat="server"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="End Date" HeaderStyle-BackColor="#99CCCC">
<ItemTemplate>
<asp:TextBox ID="TextBox4" required="required" placeholder="DD/MM/YYYY" CssClass="form-control" runat="server"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="End Date" HeaderStyle-BackColor="#99CCCC">
<ItemTemplate>
<asp:Button ID="btnDelete" Text="Delete"
CommandArgument="<%# ((GridViewRow) Container).RowIndex %>"
CommandName="More" CssClass="btn-primary btn"
Style="padding-top: 1%; padding-bottom: 1%; margin-top: 1px; margin-bottom: 1px" runat="server" />
</ItemTemplate>
<FooterStyle HorizontalAlign="Right" />
<FooterTemplate>
<asp:Button ID="ButtonAdd" Font-Bold="true" runat="server" Text="Add New Row" CssClass="btn-toolbar btn" OnClick="ButtonAdd_Click" />
</FooterTemplate>
</asp:TemplateField>
</Columns>
<%-- <FooterStyle BackColor="#99CCCC" ForeColor="#003399" />--%>
<PagerStyle BackColor="#99CCCC" ForeColor="#003399" HorizontalAlign="Left" />
<RowStyle BackColor="White" ForeColor="#003399" />
<SelectedRowStyle BackColor="#009999" Font-Bold="True" ForeColor="#CCFF99" />
<SortedAscendingCellStyle BackColor="#EDF6F6" />
<SortedAscendingHeaderStyle BackColor="#0D4AC4" />
<SortedDescendingCellStyle BackColor="#D6DFDF" />
<SortedDescendingHeaderStyle BackColor="#002876" />
</asp:GridView>
</div>
这里是整个代码通过，但带我1-2天:) 希望它有所帮助