Forms Data Controls :: Dropdownlist Won't Display Values In Gridview With Use Of Parameter
Jan 31, 2010
My database has 4 colums;
TraditionalID-------------TraditionalName------------Singles-----------Suppers
Singles and suppers are money fields for the price of same item. A bit like the price of a Small, Medium or Large item. What I would like to do is display the 'Singles' price and 'Suppers' price in seperate listitems so the user can choose 1 of them.
GridView:
Traditional Name__________Size
Chicken-------------------[DROPDOWNLIST]
DropDownList:
Price of Single is: £1.50
Price of Supper is: £2.50
My page loads up with the correct items in TraditionalName colum but the DropDownList is completely empty. I'm aware I don't have anything in for DataValueField and DataTextField but I have tried putting things in these attributes, like Suppers and Singles, but nothing works, so I have taken them out below.
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="TraditionalID" DataSourceID="SqlDataSource1">
<Columns>
<asp:BoundField DataField="TraditionalID" HeaderText="TraditionalID" InsertVisible="False" ReadOnly="True" SortExpression="TraditionalID" Visible="False" />
<asp:BoundField DataField="TraditionalName" HeaderText="Meal" SortExpression="TraditionalName" />
<asp:templateField HeaderText="Size">
<ItemTemplate>
<asp:DropDownList ID="DropDownList1" runat="server" DataSourceID="SqlDataSource2">
</asp:DropDownList>
<asp:HiddenField ID="RowTraditionalName" runat="server" Visible="false" Value='<%# Eval("TraditionalName") %>' />
<asp:SqlDataSource ID="SqlDataSource2" runat="server"
ConnectionString="<%$ ConnectionStrings:The CodfatherConnectionString %>"
SelectCommand="SELECT Suppers AS Suppers, Singles AS Singles FROM [Traditional] WHERE TraditionalName = @TraditionalName">
<SelectParameters>
ControlParameter Name="TraditionalName" Type="String" ControlID="RowTraditionalName" PropertyName="Value" />
</SelectParameters>
</asp:SqlDataSource>
</ItemTemplate>
</asp:templateField>
</Columns>
</asp:GridView>
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Jan 23, 2011
I have a gridview with some text-box columns and one dropdownlist-column (Templatefield).
With the dropdownlist i wan't to be able to edit a cell in a row. I have read a lot on the web and i have folowing code. I only get a parameter error now, before i added the dropdownlist everything was ok.
This is my html:
[Code]....
This is my update-command in the class "TransactiesDAO"
[Code]....
Look at the line:
[Code]....
in the aspx code. I don't now what to type in the "Bind(...)" text.
With above i get error: Message=DataBinding: 'System.Data.DataRowView' does not contain a property with the name 'Subrubriek'. when trying to update the row.
When i delete the line "SelectedValue=" then i get folowing error:
It gives me folowing error:
ObjectDataSource
'ObjectDataSource1' could not find a non-generic method 'UpdateTransactie' that
has parameters: Rekening, Omschrijving1, Omschrijving2, Boekdatum, BedragBij,
BedragAf, Subrubriek, @ID_SR, ID
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Nov 5, 2010
during edit mode i populate the drop down in question with data based on a value selected in another drop down also in the gridview, all works find, but the paramater is not being updated with the selected value, i think this is because i do not call any Bind in the aspx side.
<asp:TemplateField HeaderText="Build Types">
<ItemTemplate>
<asp:Label ID="lblBuildTypes runat="server" Text='<%# Bind("BuildType") %>'></asp:Label>
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[Code]....
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I have 2 dropdownlist(ddlCategoryFooter and ddlItemCodeFooter)inside my gridview. I want to set ddlItemCodeFooter 's datasource to my getItemList(decimal categoryID) method. The selecteditem of ddlCategoryFooter will serve as the paramter which will be passed to my getItemList Method. Basically,ddlItemCodeFooter is dependent on ddlCategoryFooter's selectedItem.
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This i what i want to acheive:
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[Code]....
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I got a gridview -CompGrid, having 3 columns - Dept, Employees, Status.
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Apr 3, 2013
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<Columns>
<asp:BoundField DataField="slno" HeaderText="SerialNo"
SortExpression="slno" />
<asp:BoundField DataField="ecode" HeaderText="Employee Code"
SortExpression="empcode" />
<asp:BoundField DataField="ename" HeaderText="Employee Name"
[code]....
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How to bind two database field in single listbox in display field.
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Jan 8, 2011
I have a problem with keeping the selected values in DropDownLists in rows in GridView while paging. I have this code behind:
private void RememberOldValues()
{
ArrayList LinijaIDList = new ArrayList();
int index = -1;
foreach (GridViewRow row in GridView1.Rows)
{
index = (int)GridView1.DataKeys[row.RowIndex].Value;
if (Session["equal_ITEMS"] != null)
LinijaIDList = (ArrayList)Session["equal_ITEMS"];
if (row.Cells[0].Text == lineTextBox.Text)
{
if (!LinijaIDList.Contains(index))
LinijaIDList.Add(index);
}
else
LinijaIDList.Remove(index);
}
if (LinijaIDList != null && LinijaIDList.Count > 0)
Session["equal_ITEMS"] = LinijaIDList;
}
protected void Button1_Click(object sender, EventArgs e)
{
//Session["equal_ITEMS"] = null;
RememberOldValues();
GridView1.AllowPaging = false;
BindGrid();
//RePopulateValues();
DataTable dt = new DataTable();
dt.Columns.Add(new DataColumn("LinijaID", typeof(int)));
dt.Columns.Add(new DataColumn("Ime", typeof(string)));
ArrayList LinijaIDList = (ArrayList)Session["equal_ITEMS"];
//if (LinijaIDList!=null)
//{
foreach (int LinijaID in LinijaIDList)
{
foreach (GridViewRow row in GridView1.Rows)
{
DropDownList Ime = GridView1.FooterRow.FindControl("ImeDropDownList") as DropDownList;
int rowID = (int)GridView1.DataKeys[row.RowIndex].Value;
//string Name = row.Cells[1].Text;
string Name = Ime.SelectedValue;
if (rowID == LinijaID)
{
DataRow dr = dt.NewRow();
dr["LinijaID"] = LinijaID;
dr["Ime"] = Name;
dt.Rows.Add(dr);
}
}
}
GridView1.AllowPaging = true;
Session["equal1"] = dt;
Response.Redirect("CheckedRowsPage1.aspx");
}
// else
//{
// GridView1.AllowPaging = true;
// Session["equal1"]=null;
// }
}
When I insert a value in the TextBox2 and want to select only the rows from the GridView from different pages which have value in the first column the same as the value in the TextBox2, after clicking on Button1 I get this error:
Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.
Source Error:
[Code]....
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Apr 20, 2010
here is my problem:
Admission no: 1212
Feetyep :College fee
Fee term : annual
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Apr 6, 2010
I have a gridview that calls a stored procedure that allows the user to search a parts list. In the gridview, I added a textox for Quantity and a button to Add to Quote. The idea here is that the user searches for parts, enters a quantity for a selected part, part is added to quote and user searches again for more parts. Here's my gridview code:
[Code]....
I've also created QuoteParts.aspx as follows:
[Code]....
Questions:
1. How do I display the gridview values including textbox Quantity in my listbox?
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I'm new to web dev and c# so please bare with me. I am trying to create a dynamic gridview in a web form for users to to answer questions with (code below).
The dificulty im having is that i am nesting a dropdwonlist in the gridview and want to be able to dynamically set the list values based on parameters (of the row they are on). These values are in the main dataset for the gridview as each row represents a questionid and question text and then a ddl for the criteria...
I just don't know how to set the values for the dropdown all the code so far is below... just need to be able to populate the dropdowns with the relevant values.
I have created a stored proc to return the different criteria based on the questionid and questionGroupid which is the dataset that populates the other fields in the gridview: dbo.usp_QuestionCriteria @QuestionGroupId, @QuestionId
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[CODE
]using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["Sql"].ConnectionString);
con.Open();
SqlCommand com = new SqlCommand("usp_QuestionGroupDS", con);
com.CommandType = CommandType.StoredProcedure;
SqlDataAdapter ada = new SqlDataAdapter(com);
DataSet ds = new DataSet();
ada.Fill(ds);
for (int i = 0; i < ds.Tables.Count; i++)
{
if (ds.Tables[i].Rows.Count > 0)
{
GridView gvDynamicQuestion = new GridView();
gvDynamicQuestion.Width = Unit.Pixel(700);
gvDynamicQuestion.BorderWidth = Unit.Pixel(0);
gvDynamicQuestion.Caption = "<div id="nifty" class="QuestionGroup"> <b class="rtop"><b class="r1"></b><b class="r2"></b><b class="r3"></b><b class="r4"></b></b>" + ds.Tables[i].Rows[0]["Category"].ToString() + " Questions<b class="rbottom"><b
class="r4"></b><b class="r3"></b><b class="r2"></b><b class="r1"></b></b></div>";
gvDynamicQuestion.AutoGenerateColumns = false;
gvDynamicQuestion.ShowFooter = true;
TemplateField tf = null;
tf = new TemplateField();
tf.HeaderTemplate = new DynamicGridViewTextTemplate("QuestionId", DataControlRowType.Header);
tf.ItemTemplate = new DynamicGridViewTextTemplate("QuestionId", DataControlRowType.DataRow);
tf.FooterTemplate = new DynamicGridViewTextTemplate(DataControlRowType.Footer, ds.Tables[i].Rows.Count);
gvDynamicQuestion.Columns.Add(tf);
tf = new TemplateField();
tf.HeaderTemplate = new DynamicGridViewTextTemplate("Question", DataControlRowType.Header);
tf.ItemTemplate = new DynamicGridViewTextTemplate("Question", DataControlRowType.DataRow);
gvDynamicQuestion.Columns.Add(tf);
tf = new TemplateField();
tf.HeaderText = "Criteria";
tf.HeaderTemplate = new DynamicGridViewTextTemplate("Criteria", DataControlRowType.Header);
tf.ItemTemplate = new DynamicGridViewDDLTemplate();
gvDynamicQuestion.Columns.Add(tf);
////tf = new TemplateField();
////tf.HeaderText = "Criteria";
////tf.ItemTemplate = new DynamicGridViewDDLTemplate();
////gvDynamicQuestion.Columns.Add(tf);
gvDynamicQuestion.DataSource = ds.Tables[i];
gvDynamicQuestion.DataBind();
phDynamicGridHolder.Controls.Add(gvDynamicQuestion);
}
}
}
protected void DynamicGrid_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.Footer)
{
//
}
}
}
public class DynamicGridViewTextTemplate : ITemplate
{
string _ColName;
DataControlRowType _rowType;
int _Count;
public DynamicGridViewTextTemplate(string ColName, DataControlRowType RowType)
{
_ColName = ColName;
_rowType = RowType;
}
public DynamicGridViewTextTemplate(DataControlRowType RowType, int QuestionCount)
{
_rowType = RowType;
_Count = QuestionCount;
}
public void InstantiateIn(System.Web.UI.Control container)
{
switch (_rowType)
{
case DataControlRowType.Header:
Literal lc = new Literal();
lc.Text = "<b>" + _ColName + "</b>";
container.Controls.Add(lc);
break;
case DataControlRowType.DataRow:
Label lbl = new Label();
lbl.DataBinding += new EventHandler(this.lbl_DataBind);
container.Controls.Add(lbl);
break;
case DataControlRowType.Footer:
Literal flc = new Literal();
flc.Text = "<b>Total No of Questions:" + _Count + "</b>";
container.Controls.Add(flc);
break;
default:
break;
}
}
private void lbl_DataBind(Object sender, EventArgs e)
{
Label lbl = (Label)sender;
GridViewRow row = (GridViewRow)lbl.NamingContainer;
lbl.Text =DataBinder.Eval(row.DataItem, _ColName).ToString();
}
}
public class DynamicGridViewDDLTemplate : ITemplate
{
// Implementation of ITemplate
public void InstantiateIn(System.Web.UI.Control container)
{
// Create a DDL
DropDownList ddl = new DropDownList();
//Attach method to delegate
ddl.DataBinding += new System.EventHandler(this.ddl_DataBind);
container.Controls.Add(ddl);
}
//Method that responds to the DataBinding event
private void ddl_DataBind(object sender, System.EventArgs e)
{
//DropDownList ddl = (DropDownList)sender;
//DataGridItem container = (DataGridItem)ddl.NamingContainer;
//ddl.Data.Checked = [Data binding expression];
}
}
[/CODE]
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[Code]....
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[Code]....
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[Code]....
Aspx code:
[Code]....
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<script type="text/javascript" src="~/Scripts/jquery-1.10.2.js"></script>
<script type="text/javascript">
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// function Edit() {
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[Code].....
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