I'm using ASP.NET Web Application (.NET Framework).
I have a GridView with auto-generated "Select" button, and an "Approve" button which is outside of the GridView. I want to click on the "Select" link to get the DataKeyName (ViewingRequestID) and use it in the "Approve" button's onClick method.
When I run my code, I click on "Select", it gives the correct ViewingRequestID. But when I click on "Approve" after that, the ViewingRequestID becomes 0.
How do I get the value to remain the same?
HTML
<asp:GridView ID="gvViewingRequests" runat="server" BackColor="White" BorderColor="#E7E7FF" BorderStyle="None" BorderWidth="1px" CellPadding="3" GridLines="Horizontal" AllowPaging="True" AutoGenerateColumns="False" DataKeyNames="ViewingRequestID" PageSize="5" OnRowCommand="gvViewingRequests_RowCommand" AutoGenerateSelectButton="True">
<AlternatingRowStyle BackColor="#F7F7F7" />
<Columns>
<asp:BoundField DataField="ViewingRequestID" HeaderText="Viewing Request ID" />
<asp:BoundField DataField="ParentID" HeaderText="Parent ID" />
<asp:BoundField DataField="StudentName" HeaderText="Student Name" />
<asp:BoundField DataField="StudentID" HeaderText="Student ID" />
<asp:BoundField DataField="Status" HeaderText="Status" />
<asp:BoundField DataField="DateCreated" HeaderText="Date Created" />
</Columns>
<FooterStyle BackColor="#B5C7DE" ForeColor="#4A3C8C" />
<HeaderStyle BackColor="#4A3C8C" Font-Bold="True" ForeColor="#F7F7F7" />
<PagerStyle BackColor="#E7E7FF" ForeColor="#4A3C8C" HorizontalAlign="Center" />
<RowStyle BackColor="#E7E7FF" ForeColor="#4A3C8C" />
<SelectedRowStyle BackColor="#738A9C" Font-Bold="True" ForeColor="#F7F7F7" />
<SortedAscendingCellStyle BackColor="#F4F4FD" />
<SortedAscendingHeaderStyle BackColor="#5A4C9D" />
<SortedDescendingCellStyle BackColor="#D8D8F0" />
<SortedDescendingHeaderStyle BackColor="#3E3277" />
</asp:GridView>
Code-behind
ViewingRequest viewingRequest = new ViewingRequest();
protected void gvViewingRequests_RowCommand(object sender, GridViewCommandEventArgs e)
{
int i = Convert.ToInt32(e.CommandArgument);
viewingRequest.viewingRequestID = Convert.ToInt32(gvViewingRequests.Rows[i].Cells[1].Text);
}
protected void btnApprove_Click(object sender, EventArgs e)
{
int errorCode = viewingRequest.changeStatus(viewingRequest.viewingRequestID, "A");
if (errorCode == 0)
{
displayViewingRequests();
lblMsg.Text = $"Viewing Request {viewingRequest.viewingRequestID} approved.";
}
}
Related
I'm applying edit functionality on grid view with object data source.I want to take previous value when i click edit button that's need for another purpose here i'm trying to write code but it gives current value.how to get previous value.......hope you can help me
protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
GridViewRow row = (GridView1.Rows[e.RowIndex] as GridViewRow);
string totalQuantity = (row.Cells[5].Controls[0] as TextBox).Text;//It gives current value but i want previous value
string totalPurchasePrice = (row.Cells[6].Controls[0] as TextBox).Text; //It gives current value but i want previous value
GridView1.EditIndex = -1;
//value store in session start
Session["totalQuantity"] = totalQuantity;
Session["totalPurchasePrice"] = totalPurchasePrice;
//value store in session end
}
and grid view code
<asp:GridView ID="GridView1" runat="server" CssClass="dataGridTable" AutoGenerateColumns="False" Width="100%" AllowPaging="True" BackColor="White" BorderColor="#CCCCCC" BorderStyle="None" BorderWidth="1px" CellPadding="3" DataSourceID="ObjectDataSource1" HeaderStyle-Height="30" OnRowCreated="GridView1_RowCreated" PageSize="30" DataKeyNames="invoiceNumber,productName,productCategory" OnSelectedIndexChanged="GridView1_SelectedIndexChanged" OnRowUpdating="GridView1_RowUpdating">
<Columns>
<asp:CommandField ShowEditButton="true" ShowSelectButton="True" />
<asp:CommandField ShowDeleteButton="true"/>
<asp:BoundField DataField="invoiceNumber" HeaderText="Invoice" ReadOnly="true" SortExpression="invoiceNumber" />
<asp:BoundField DataField="productName" HeaderText="Name" ReadOnly="true" SortExpression="productName" />
<asp:BoundField DataField="productCategory" HeaderText="Category" ReadOnly="true" SortExpression="productCategory" />
<asp:BoundField DataField="totalQuantity" HeaderText="Quantity" SortExpression="totalQuantity" />
<asp:BoundField DataField="totalPurchasePrice" HeaderText="Total Price" SortExpression="totalPurchasePrice" />
<asp:BoundField DataField="salePricePerItem" HeaderText="Sale Price/Item" SortExpression="salePricePerItem" />
<asp:BoundField DataField="comments" HeaderText="Comments" SortExpression="comments" />
<asp:BoundField DataField="date" HeaderText="Date" ReadOnly="true" SortExpression="date" />
<asp:TemplateField>
<ItemTemplate>
<asp:ImageButton ID="ImageButton1" runat="server" Height="24px" ImageUrl="~/Images/detailsInfo.png" Width="24px" OnClick="ImageButton1_Click" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
<FooterStyle BackColor="White" ForeColor="#000066" />
<HeaderStyle BackColor="#006699" Font-Bold="True" ForeColor="White" CssClass="gridHeaderAlignment" />
<PagerStyle BackColor="White" ForeColor="#000066" HorizontalAlign="Left" />
<RowStyle ForeColor="#000066" HorizontalAlign="Center" VerticalAlign="Middle" />
<HeaderStyle HorizontalAlign="Center" VerticalAlign="Middle" />
<SelectedRowStyle BackColor="#669999" Font-Bold="True" ForeColor="White" />
<SortedAscendingCellStyle BackColor="#F1F1F1" />
<SortedAscendingHeaderStyle BackColor="#007DBB" />
<SortedDescendingCellStyle BackColor="#CAC9C9" />
<SortedDescendingHeaderStyle BackColor="#00547E" />
</asp:GridView>
I have a gridview that should split into pages but the issue is that when I change the page the whole gridview is disappearing I tried everything I found in the internet but with no solution here is my code
<asp:GridView ID="ExistContents" runat="server" AutoGenerateColumns="False" CellPadding="4" ForeColor="#333333" GridLines="None"
AllowPaging="true" PageSize="5" OnPageIndexChanging="ExistContents_PageIndexChanging" >
<AlternatingRowStyle BackColor="White" ForeColor="#284775" />
<Columns>
<asp:BoundField DataField="ContentID" HeaderText="id" />
<asp:ImageField DataImageUrlField="TmpFilename" HeaderText="Image">
<ControlStyle Height="64px" Width="96px" />
</asp:ImageField>
<asp:BoundField DataField="Name" HeaderText="Name" />
<asp:BoundField DataField="Description" HeaderText="Description" />
<asp:BoundField DataField="Type" HeaderText="Type" />
<asp:BoundField DataField="ContentID" HeaderText="id" Visible="false" ShowHeader="false" />
<asp:TemplateField HeaderText="Delete">
<ItemTemplate>
<asp:UpdatePanel runat="server">
<ContentTemplate>
<asp:CheckBox runat="server" ID="ChBox1" OnCheckedChanged="ExistContents_CheckedChanged" AutoPostBack="True"/>
</ContentTemplate>
</asp:UpdatePanel>
</ItemTemplate>
</asp:TemplateField>
</Columns>
<EditRowStyle BackColor="#999999" />
<FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" CssClass="header"/>
<PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
<RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
<SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
<SortedAscendingCellStyle BackColor="#E9E7E2" />
<SortedAscendingHeaderStyle BackColor="#506C8C" />
<SortedDescendingCellStyle BackColor="#FFFDF8" />
<SortedDescendingHeaderStyle BackColor="#6F8DAE" />
</asp:GridView>
and here is the event handler
protected void ExistContents_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
ExistContents.PageIndex = e.NewPageIndex;
List<CONTENT> panier;
panier = (List<CONTENT>)Session["PANIER"];
ExistContents.DataSource = panier;
ExistContents.DataBind();
}
You should handle the PageIndexChanged event instead.
The pageIndexChanging is made to give you an option to cancel the paging before it's executed.
here is an answer for this probleme, acctually my datasource was not the session but a linq query so i changed it and it works perfectly
and here is my new code
protected void ExistContents_CheckedChanged(object sender, EventArgs e)
{
CheckBox chk = (CheckBox)sender;
GridViewRow gr = (GridViewRow)chk.Parent.Parent.Parent.Parent;
int id= Convert.ToInt32(gr.Cells[0].Text);
if (chk.Checked)
AddToCaddy(id, "DELETE");
else
DeleteFromCaddy(id);
UpdatePanel.DataBind();
UpdatePanel.Update();
}
just for information if you are making a databind to your gridview in the Page_Load inside the if (!IsPostBack) then you will need to redefind the dataSource but if you'r not then you only need to use these functions
UpdatePanel.DataBind();
UpdatePanel.Update();
i hope this helps
I am designing a search page where if the View/Edit link button is clicked, another page loads with more info on the subject, however; when the button is clicked, it does not throw the Gridview's RowCommand event. The Gridview is built dynamically based on search terms and comparing to a database through an SQLDataSource. Here is the html for the Gridview.
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="RID" DataSourceID="Report_System" CellPadding="4" ForeColor="#333333" GridLines="None" OnDataBound="GridView1_DataBound" Width="739px" OnRowCommand="GridView1_RowCommand">
<AlternatingRowStyle BackColor="White" />
<Columns>
<asp:BoundField DataField="RID" HeaderText="Report ID" InsertVisible="False" ReadOnly="True" SortExpression="RID" />
<asp:BoundField DataField="Rdate" HeaderText="Report Date" SortExpression="Rdate" />
<asp:BoundField DataField="Rtype" HeaderText="Type" SortExpression="Rtype" />
<asp:BoundField DataField="OID" HeaderText="Officer ID" SortExpression="OID" />
<asp:BoundField DataField="Ofirstname" HeaderText="Officer" SortExpression="Ofirstname" />
<asp:BoundField DataField="Pname" HeaderText="Student Reportee" SortExpression="Pname" />
<asp:ButtonField CommandName="View/Edit" Text="View/Edit" />
</Columns>
<EditRowStyle BackColor="#7C6F57" />
<FooterStyle BackColor="#1C5E55" Font-Bold="True" ForeColor="White" />
<HeaderStyle BackColor="#1C5E55" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="#666666" ForeColor="White" HorizontalAlign="Center" />
<RowStyle BackColor="#E3EAEB" />
<SelectedRowStyle BackColor="#C5BBAF" Font-Bold="True" ForeColor="#333333" />
<SortedAscendingCellStyle BackColor="#F8FAFA" />
<SortedAscendingHeaderStyle BackColor="#246B61" />
<SortedDescendingCellStyle BackColor="#D4DFE1" />
<SortedDescendingHeaderStyle BackColor="#15524A" />
</asp:GridView>
Currently, the RowCommand event is SUPPOSED to simply post back to a label for testing purposes.
protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
//get row index
int row = Convert.ToInt32(e.CommandArgument);
errorLabel.Text = row.ToString();
}
I have made sure that ViewState is Enabled, the OnRowCommand is in the right place, and my PageLoad event is empty. I can't find any forum posts to help me beyond this. Any ideas?
Try adding a check on CommandName inside GridView1_RowCommand with an if statement, like this
protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
if(e.CommandName == "View/Edit")
{
//get row index
int row = Convert.ToInt32(e.CommandArgument);
errorLabel.Text = row.ToString();
}
}
I am trying to get the selected row data and transfer it to a label on the same page. However I cannot get the Gridview.SelectedRow to work with my CommandName. I have tried everything....
I get the error. Object reference not set to an instance of an object. on Label2.Text
Here is my Code:
protected void GridView1_RowCommand(Object sender, GridViewCommandEventArgs e)
{
// If multiple ButtonField column fields are used, use the
// CommandName property to determine which button was clicked.
if (e.CommandName == "Grab")
{
Label2.Text = GridView1.SelectedRow.Cells[2].Text;
Label3.Text = GridView1.SelectedRow.Cells[3].Text;
Label4.Text = GridView1.SelectedRow.Cells[4].Text;
Label5.Text = GridView1.SelectedRow.Cells[5].Text;
}
}
<asp:GridView ID="GridView1" runat="server" AllowPaging="True" AllowSorting="True" AutoGenerateColumns="False" BackColor="White" BorderColor="#DEDFDE" BorderStyle="None" BorderWidth="1px" CellPadding="4" DataKeyNames="ID" DataSourceID="SqlDataSource1" ForeColor="Black" GridLines="Vertical" CssClass="td" OnSelectedIndexChanged="GridView1_SelectedIndexChanged" Width="574px" onrowcommand="GridView1_RowCommand">
<AlternatingRowStyle BackColor="White" />
<Columns>
<asp:TemplateField HeaderText="Action">
<ItemTemplate>
<asp:ImageButton ID="ImageButton2" runat="server" ImageUrl="~/images/edit.png" OnClick="ImageButton2_Click" />
<asp:ImageButton ID="ImageButton1" runat="server" CommandName="Select" ImageUrl="~/images/delete.png" onclientclick=" return confirm('Are you want to Delete this Vehicle?');" />
<asp:ImageButton ID="ImageButton3" runat="server" ImageUrl="~/images/refre.png" CommandName="Grab" />
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="ID" HeaderText="ID" InsertVisible="False" ReadOnly="True" SortExpression="ID" />
<asp:BoundField DataField="Year" HeaderText="Year" SortExpression="Year" />
<asp:BoundField DataField="Make" HeaderText="Make" SortExpression="Make" />
<asp:BoundField DataField="Model" HeaderText="Model" SortExpression="Model" />
<asp:BoundField DataField="Submodel" HeaderText="Submodel" SortExpression="Submodel" />
<asp:BoundField DataField="ISENABLED" HeaderText="ISENABLED" SortExpression="ISENABLED" />
</Columns>
<FooterStyle BackColor="#CCCC99" />
<HeaderStyle BackColor="#6B696B" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="#F7F7DE" ForeColor="Black" HorizontalAlign="Right" />
<RowStyle BackColor="#F7F7DE" />
<SelectedRowStyle BackColor="#CE5D5A" Font-Bold="True" ForeColor="White" />
<SortedAscendingCellStyle BackColor="#FBFBF2" />
<SortedAscendingHeaderStyle BackColor="#848384" />
<SortedDescendingCellStyle BackColor="#EAEAD3" />
<SortedDescendingHeaderStyle BackColor="#575357" />
</asp:GridView>
Try something like this. Since you're trying to access the values in the command event and not in the OnSelectedIndexChanged event you need to get hold of the row triggering the command event first.
if (e.CommandName == "Grab")
{
GridViewRow row = (GridViewRow)((ImageButton)e.CommandSource).NamingContainer;
if (row != null)
{
Label2.Text = row.Cells[2].Text;
Label3.Text = row.Cells[3].Text;
Label4.Text = row.Cells[4].Text;
Label5.Text = row.Cells[5].Text;
}
}
I have a grid view, if the database is returning null for a particular column I want to insert a drop down list that is populated from a database.
Here is the code I have to identify the the column is null and it is working correctly.
protected void viewThemeTypeAssociationsGridView_OnRowDataBound(Object sender, GridViewRowEventArgs e)
{
if (e.Row.Cells[1].Text == " ")
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
//fill current rows cell with a dropdown list
}
}
Here is the gridview:
<asp:GridView ID="viewThemeTypeAssociationsGridView" runat="server"
AutoGenerateColumns="False" BackColor="#DEBA84" BorderColor="#DEBA84"
BorderStyle="None" BorderWidth="1px" CellPadding="3" CellSpacing="2"
DataSourceID="SqlDataSource6" OnRowDataBound="viewThemeTypeAssociationsGridView_OnRowDataBound">
<Columns>
<asp:BoundField DataField="Name" HeaderText="Name" SortExpression="Name" />
<asp:BoundField DataField="Type" HeaderText="Type" SortExpression="Type" />
</Columns>
<FooterStyle BackColor="#F7DFB5" ForeColor="#8C4510" />
<HeaderStyle BackColor="#A55129" Font-Bold="True" ForeColor="White" />
<PagerStyle ForeColor="#8C4510" HorizontalAlign="Center" />
<RowStyle BackColor="#FFF7E7" ForeColor="#8C4510" />
<SelectedRowStyle BackColor="#738A9C" Font-Bold="True" ForeColor="White" />
<SortedAscendingCellStyle BackColor="#FFF1D4" />
<SortedAscendingHeaderStyle BackColor="#B95C30" />
<SortedDescendingCellStyle BackColor="#F1E5CE" />
<SortedDescendingHeaderStyle BackColor="#93451F" />
</asp:GridView>
<asp:SqlDataSource ID="SqlDataSource6" runat="server"
ConnectionString="<%$ ConnectionStrings:ApplicationServices %>" >
</asp:SqlDataSource>
Additionally, once I populate the row, how do I know which drop down list specifically is being used when there are many versions of it?
Design
<asp:GridView ID="viewThemeTypeAssociationsGridView" runat="server" AutoGenerateColumns="False"
BackColor="#DEBA84" BorderColor="#DEBA84" BorderStyle="None" BorderWidth="1px"
CellPadding="3" CellSpacing="2"
OnRowDataBound="viewThemeTypeAssociationsGridView_RowDataBound"
DataSourceID="Sql_New" >
<Columns>
<asp:BoundField DataField="id" HeaderText="id" SortExpression="id"
InsertVisible="False" ReadOnly="True" />
<asp:BoundField DataField="Name" HeaderText="Name" SortExpression="Name" />
<asp:BoundField DataField="Type" HeaderText="Type" SortExpression="Type" />
<asp:TemplateField HeaderText ="New Column" >
<ItemTemplate >
<asp:DropDownList ID="ddlnew" runat ="server" Visible ="false" ></asp:DropDownList>
</ItemTemplate>
</asp:TemplateField>
</Columns>
<FooterStyle BackColor="#F7DFB5" ForeColor="#8C4510" />
<HeaderStyle BackColor="#A55129" Font-Bold="True" ForeColor="White" />
<PagerStyle ForeColor="#8C4510" HorizontalAlign="Center" />
<RowStyle BackColor="#FFF7E7" ForeColor="#8C4510" />
<SelectedRowStyle BackColor="#738A9C" Font-Bold="True" ForeColor="White" />
<SortedAscendingCellStyle BackColor="#FFF1D4" />
<SortedAscendingHeaderStyle BackColor="#B95C30" />
<SortedDescendingCellStyle BackColor="#F1E5CE" />
<SortedDescendingHeaderStyle BackColor="#93451F" />
</asp:GridView>
<asp:SqlDataSource ID="Sql_New" runat="server"
ConnectionString="<%$ ConnectionStrings:EmployeeConnectionString %>"
SelectCommand="SELECT * FROM [tblnew]"></asp:SqlDataSource>
Code
protected void viewThemeTypeAssociationsGridView_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.Cells[2].Text == " ")
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
DropDownList ddlnew = (DropDownList)e.Row.FindControl("ddlnew");
ddlnew.Visible = true;
}
}
}