Replace Text Within GridView With Image
Oct 7, 2014
I have a GridView that is populated in code from a MySQL database.The code:
Code:
If con.State = Data.ConnectionState.Open Then
con.ChangeDatabase("EcoWatch")
strSQL = "SELECT DeviceDescription, deviceStatus FROM switchstatus WHERE ClientID='" & ClientID & "' ORDER BY DeviceType"
myDataAdapter = New MySqlDataAdapter(strSQL, con)
[Code]...
What I need to accomplish is :
1). Change the text "ON" or "OFF" with the relevant images:"~/Images/SwON.png" and "~/Images/SwOFF.png"
2). Add an additional ImageButton column to the far right of the GridView that allows the user to perform an action.
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
public partial class UserControls_ProductsList : System.Web.UI.UserControl
{
protected void Page_Load(object sender, EventArgs e)
{
PopulateControls();
}
private void PopulateControls()
{
// Retrieve DepartmentID from the query string
string departmentId = Request.QueryString["DepartmentID"];
// Retrieve CategoryID from the query string
string categoryId = Request.QueryString["CategoryID"];
// Retrieve Page from the query string
string page = Request.QueryString["Page"];
if (page == null) page = "1";
// Retrieve Search string from query string
string searchString = Request.QueryString["Search"];
// How many pages of products?
int howManyPages = 1;
// pager links format
string firstPageUrl = "";
string pagerFormat = "";
// If performing a product search
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{
// Retrieve AllWords from query string
string allWords = Request.QueryString["AllWords"];
// Perform search
list.DataSource = CatalogAccess.Search(searchString, allWords,
page, out howManyPages);
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{
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CatalogAccess.GetProductsInCategory(categoryId, page, out howManyPages);
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{
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(departmentId, page, out howManyPages);
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// Retrieve list of products on catalog promotion
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}
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topPager.Show(int.Parse(page), howManyPages, firstPageUrl, pagerFormat, false);
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}
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protected void list_ItemDataBound(object sender, DataListItemEventArgs e)
{
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DataRowView dataRow = (DataRowView)e.Item.DataItem;
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// temp variables
string prevAttributeName = "";
string attributeName, attributeValue, attributeValueId;
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prevAttributeName = attributeName;
attributeNameLabel = new Label();
attributeNameLabel.Text = attributeName + ": ";
attributeValuesDropDown = new DropDownList();
attrPlaceHolder.Controls.Add(attributeNameLabel);
attrPlaceHolder.Controls.Add(attributeValuesDropDown);
}
// add a new attribute value to the DropDownList
attributeValuesDropDown.Items.Add(new ListItem(attributeValue, attributeValueId));
}
}
}
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Jan 5, 2014
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<asp:ListItem Selected="True">-</asp:ListItem>
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Apr 5, 2010
Failed to load viewstate. The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request. For example, when adding controls dynamically, the controls added during a post-back must match the type and position of the controls added during the initial request.
The above error occurs with gridview control , when used with template field columns with item template / and edit templates etc.
updating a row within gridview, at the time of loadiong it loads perfectly fined, but when tried to modify an existing row within gridview control, then it produces the error. Make sure the grid view control has to be a child control which manages the child table info with in a master form. to reproduce the above problem the grid view must be loading the child records info of a master within the masterform, meaning both master data and gridview data all to be managed in one single form.
I had to replace gridview control with datagrid and then it worked perfectly fine. I wasted almost 4 days of my time., there is no way we could figure out the problem. here is the full info of the problem.
Server Error in '/' Application.
Failed to load viewstate. The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request. For example, when adding controls dynamically, the controls added during a post-back must match the type and position of the controls added during the initial request.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Web.HttpException: Failed to load viewstate. The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request. For example, when adding controls dynamically, the controls added during a post-back must match the type and position of the controls added during the initial request.
Source Error:
[Code]....
Stack Trace:
[HttpException (0x80004005): Failed to load viewstate. The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request. For example, when adding controls dynamically, the controls added during a post-back must match the type and position of the controls added during the initial request.] System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +306 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Page.LoadAllState() +312 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1661
Version Information: Microsoft .NET Framework Version:2.0.50727.3603; ASP.NET Version:2.0.50727.3082
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<b>%THIS CAN BE ANY TEXT%</b>.
[Code]....
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