Forms Data Controls :: How To Use Gridview RowDataBound Just Underline For The First Column

Feb 3, 2010

I would like to ask how can i make the gridview just underline the first column by using the rowdatabound.

Currently my code using as below:

protected void gvResult_RowDataBound(object sender, GridViewRowEventArgs e)

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I have an internal web application which uses a custom encryption class to convert strings to varbinary(50) columns in SQL. When I display the table in a GridView, I want to use the RowDataBound event to decrypt the encrypted column back to a string to display.

Currently I have the following in my RowDataBound event:

[Code]....

This throws an exception when I try to load the page: TransformFinalBlock - Length of the data to decrypt is invalid.

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protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
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[Code]....

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protected void grdMain_RowDataBound(object sender, GridViewRowEventArgs e)
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}
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I'm attempting to change the format of the 2nd column in a gridview during the rowdatabound event. I pulled sample code from various sources and wrote the following, but it's not working. I tried to do a trace, but the rowdatabound event didn't appear in the trace. Here's some code for the gridview:

[Code]....

Here's what I have in the code behind:

[Code]....

I expected the values in the 2nd template column to get written in italics, but nothing happens. I do have a gridview skin that's getting applied.

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I have a gridview and a template column:

<asp:TemplateField HeaderText="Active">
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<ItemTemplate>
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</asp:TemplateField>

The item "Active" is a bit from the database And for the RowDataBound:

Const HeavyCheckMark As Char = ChrW(&H2714)
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[Code]....

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[code]...

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Dim prod= From p In db.products _
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How to get the DataKey value in RowDataBound event for GridView

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I have a very simple asp.net page, just some buttons and one GridView on it. The logic is a user click the QUery button,then the button click event was trigured to populate the gridview with data queried from database via LINQ. for a user friendly interface, in RowDataBound event, I visit every row, change a boolean value into checkbox represention. But it seem that the RowDataBound run twice, because the checkboxs were inserted twice for every row in one cell. so why? the source code snippet as follow:

protected void btnSelect_Click(object sender, EventArgs e)
{
RetiredEmployeeDataContext db = new RetiredEmployeeDataContext();
GridView1.DataSource = db.ENTUserAccountSelectAll();//userAccounts;
GridView1.DataBind();
}
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{
if (e.Row.RowType == DataControlRowType.DataRow)
{
CheckBox chkActive = new CheckBox();
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}
}

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Forms Data Controls :: How To Format E.Row.DataItem In RowDataBound Event Of GridView Using C#

Mar 3, 2010

I am NOT formatting at DECLARATIVE time

The following code works perfectly

[Code]....

Can I directly format e.RowDataItem.

I don't want to format by using e.Row.Cells[4].Text

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Forms Data Controls :: Unbound Gridview Row Modify In Rowdatabound Don't Edit?

Mar 2, 2011

i use a gridview to show data from datasource, but i have some column in this gridview that they're not bound. If i go in edit mode, my unbound control show me the textbox to enter value and its ok, but if i modify value thru rowdatabound, now when i go in edit mode, the textbox are not showing as i expect, its just showing the value i put in rowdatabound, but i don't have the textbox to let me enter a new value and update it after.

And more in the same relation: with the two above condition i wrote, when i dont modify value in rowdatabound, i can modify value in prerender event with this line:

TextBox
box1 = this.GridView1.Rows[this.GridView1.EditIndex].FindControl("TextBox1")
as
TextBox;
box1.Text = "a value"
;
but

when again i modify value in rowdatabound, the line above will not work too, box1 is load with a null value

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Forms Data Controls :: Why Wasn't GridView's RowDataBound Event Fired

Apr 21, 2010

Why wasn't my GridView's RowDataBound event fired? I have a masterpage on whick i have a query button, and I have a content page on which i have a customized GridView(named cgvEmployees,derived from GridView). The logic is when user click the button, the button click event triggered that search the underlying database and populate the GridView.

Everything runs great except that RowDataBound event isn't triggered. Because I have to change some cells' representations in RowDataBound event handler. I have surfed so much pages to find the answer but failed. Below is what i have already done:

1. set the autoeventwireup to true;
2. i have a cgvEmployees.bind() sentence in the button click event handler;
3. i have OnRowDataBound="cgvEmployees_OnRowDataBound" in the content page GridView tag attribute

by the way, the database query is coded by Linq Dynamic Query (please google 'dynamic Linq').

void Master_QueryButton_Click(object sender, EventArgs e)
{
RetiredEmployeeDataContext db = new RetiredEmployeeDataContext();
NameValueCollection nvcQueryKeyValue = getNVCQueryKeyValue();
Expression<Func<RetiredEmployee, bool>> searchPredicate = getLambdaExpr(nvcQueryKeyValue);
IQueryable<RetiredEmployee> retireds = db.RetiredEmployees;
Expression expr = Expression.Call(typeof(Queryable), "Where",
new Type[] { typeof(RetiredEmployee) }, Expression.Constant(retireds), searchPredicate);
IQueryable<RetiredEmployee> query = db.RetiredEmployees.AsQueryable().Provider.CreateQuery<RetiredEmployee>(expr);
List<RetiredEmployee> employeeList = new List<RetiredEmployee>(query);
List<RetiredEmployeeEO> employees = new List<RetiredEmployeeEO>();
foreach (RetiredEmployee employee in employeeList)
{
RetiredEmployeeEO employeeEO = new RetiredEmployeeEO();
employeeEO.MapEntityToProperties(employee);
employees.Add(employeeEO);
}
cgvEmployees1.ListClassName = typeof(RetiredEmployeeEOList).AssemblyQualifiedName;
cgvEmployees1.LoadMethodName = "LoadFromQuery";
cgvEmployees1.LoadMethodParameters.Clear();
cgvEmployees1.LoadMethodParameters.Add(employees);
cgvEmployees1.DataBind();
}
protected void cgvEmployees1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
//Add the edit link to the action column.
HyperLink editLink = new HyperLink();
if (((BasePage)this.Page).ReadOnly)
{
editLink.Text = "View";
}
else
{
editLink.Text = "Edit";
}
editLink.NavigateUrl = "employee.aspx" + EncryptQueryString("id=" + ((RetiredEmployeeEO)e.Row.DataItem).ID.ToString());
if(e.Row.Cells[0].Controls.Count==0)
e.Row.Cells[0].Controls.Add(editLink);
//Add checkbox to display the isactive field.
CheckBox chkActive = new CheckBox();
chkActive.Checked = ((RetiredEmployeeEO)e.Row.DataItem).liveOrDead;
chkActive.Enabled = false;
if(e.Row.Cells[24].Controls.Count==0)
e.Row.Cells[24].Controls.Add(chkActive);
if (((RetiredEmployeeEO)e.Row.DataItem).gender.Equals((byte)1))
e.Row.Cells[2].Text = "Male";
else
e.Row.Cells[2].Text = "Female";
if (((RetiredEmployeeEO)e.Row.DataItem).retiredOr.Equals((byte)1))
e.Row.Cells[14].Text = "Retired1";
else
e.Row.Cells[14].Text = "Retired2";
if (((RetiredEmployeeEO)e.Row.DataItem).birthday.Equals("1753-01-01"))
e.Row.Cells[3].Text = "";
if (((RetiredEmployeeEO)e.Row.DataItem).dayToEmployed.Equals("1753-01-01"))
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if (((RetiredEmployeeEO)e.Row.DataItem).dayRetired.Equals("1753-01-01"))
e.Row.Cells[7].Text = "";
if (((RetiredEmployeeEO)e.Row.DataItem).dayParty.Equals("1753-01-01"))
e.Row.Cells[13].Text = "";
if (((RetiredEmployeeEO)e.Row.DataItem).daytoassign.Equals("1753-01-01"))
e.Row.Cells[17].Text = "";
}
}

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Feb 5, 2011

I have a Gridview with edit and update feature enabled. It displays the data correctly but when I click on the Edit linkbutton(to edit the data), I get the error "Object reference not set to an instance of an object".

I tried debugging and found that the row which I click (say editindex is 1) loses its value. I could identify this while debugging the code, when the code flow moves to the rowdatabound event, the label (or for that matter any control in the rowdatabound event) shows a null value and eventually errors out.

I am unable to figure out as to why the control specified in the rowdatabound event loses its value when editing. Note: The lost valueow data is the one which I tried editing.

I am attaching the code which I have written for the rowdatabound event.

[Code]....

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The GridView is in another UpdatePanel.

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This is slowing the page down when the reset button is clicked. Does anyone know why this is happening and how to stop it. I haven't posted the code and explained it in plain english for ease of reading.

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Can I call a javascript function in the RowDatabound event of the Gridview?

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