Default. aspx
Copy codeThe Code is as follows: <% @ Page Language = "C #" AutoEventWireup = "true" CodeFile = "Index. aspx. cs" Inherits = "Index" %><! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<Html xmlns = "http://www.w3.org/1999/xhtml">
<Head runat = "server">
<Title> Supply and Demand Information Network review and release information </title>
</Head>
<Body class = "Font">
<Form id = "form1" runat = "server">
<Div style = "text-align: left" align = "left"> <asp: Panel ID = "Panel2" runat = "server">
<Asp: GridView ID = "GridView1" runat = "server" AutoGenerateColumns = "False"
OnRowDataBound = "GridView1_RowDataBound"
OnSelectedIndexChanging = "GridView1_SelectedIndexChanging" Font-Size = "9pt"
AllowPaging = "True" EmptyDataText = "no relevant data can be displayed! "
OnPageIndexChanging = "GridView1_PageIndexChanging" CellPadding = "4"
ForeColor = "#333333" GridLines = "None" DataKeyNames = "id">
<Columns>
<Asp: TemplateField>
<ItemTemplate>
<Asp: CheckBox ID = "cbSingleOrMore" runat = "server"/>
</ItemTemplate>
</Asp: TemplateField>
<Asp: BoundField DataField = "id" HeaderText = "Information ID"/>
<Asp: BoundField DataField = "name" HeaderText = "info topic"/>
<Asp: BoundField DataField = "type" HeaderText = "Information Classification"/>
<Asp: BoundField DataField = "content" HeaderText = "published content"/>
<Asp: BoundField DataField = "userName" HeaderText = "publisher"/>
<Asp: BoundField DataField = "lineMan" HeaderText = "Contact"/>
<Asp: BoundField DataField = "issueDate" HeaderText = "Release Date"
DataFormatString = "{0: d}"/>
</Columns>
<FooterStyle BackColor = "#990000" Font-Bold = "True" ForeColor = "White"/>
<RowStyle BackColor = "# FFFBD6" ForeColor = "#333333"/>
<SelectedRowStyle BackColor = "# FFCC66" Font-Bold = "True" ForeColor = "Navy"/>
<PagerStyle BackColor = "# FFCC66" ForeColor = "#333333" HorizontalAlign = "Right"/>
<HeaderStyle BackColor = "#990000" Font-Bold = "True" ForeColor = "White"/>
<AlternatingRowStyle BackColor = "White"/>
</Asp: GridView>
</Asp: Panel>
<Asp: CheckBox ID = "cbAll" runat = "server" AutoPostBack = "True"
Font-Size = "9pt" OnCheckedChanged = "cbAll_CheckedChanged"
Text = "select all/reselect"/>
<Asp: Button ID = "btnUpdateTime" runat = "server" onclick = "btnUpdateTime_Click"
Text = "update release time"/>
</Div>
</Form>
</Body>
</Html>
Default. aspx. cs
Copy codeThe Code is as follows:Using System;
Using System. Data;
Using System. Configuration;
Using System. Collections;
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. Text;
Using System. Data. SqlClient;
Public partial class Index: System. Web. UI. Page
{
SqlConnection sqlcon;
String strCon = ConfigurationManager. receivettings ["conStr"];
Protected void Page_Load (object sender, EventArgs e)
{
If (! IsPostBack)
{
This. GV_DataBind ();
}
}
Public void GV_DataBind ()
{
String sqlstr = "select * from tb_inf ";
Sqlcon = new SqlConnection (strCon );
SqlDataAdapter da = new SqlDataAdapter (sqlstr, sqlcon );
DataSet ds = new DataSet ();
Sqlcon. Open ();
Da. Fill (ds, "tb_inf ");
Sqlcon. Close ();
This. GridView1.DataSource = ds;
This. GridView1.DataKeyNames = new string [] {"id "};
This. GridView1.DataBind ();
If (GridView1.Rows. Count> 0)
{
Return; // if there is data, do not process it
}
Else // displays the header with no data prompt
{
StrHelper. GridViewHeader (GridView1 );
}
}
Protected void GridView1_RowDataBound (object sender, GridViewRowEventArgs e)
{
If (e. Row. RowType = DataControlRowType. DataRow)
{
String gIntro = e. Row. Cells [4]. Text;
E. Row. Cells [4]. Text = StrHelper. GetFirstString (gIntro, 12 );
}
}
Protected void gridviewincluselectedindexchanging (object sender, GridViewSelectEventArgs e)
{
String id = this. GridView1.DataKeys [e. NewSelectedIndex]. Value. ToString ();
Sqlcon = new SqlConnection (strCon );
SqlCommand com = new SqlCommand ("select [check] from tb_inf where id = '" + id + "'", sqlcon );
Sqlcon. Open ();
String count = Convert. ToString (com. ExecuteScalar ());
If (count = "False ")
{
Count = "1 ";
}
Else
{
Count = "0 ";
}
Com. CommandText = "update tb_inf set [check] =" + count + "where id =" + id;
Com. ExecuteNonQuery ();
Sqlcon. Close ();
This. GV_DataBind ();
}
Protected void GridView1_PageIndexChanging (object sender, GridViewPageEventArgs e)
{
This. GridView1.PageIndex = e. NewPageIndex;
This. GV_DataBind ();
}
Protected void cbAll_CheckedChanged (object sender, EventArgs e)
{
For (int I = 0; I <= GridView1.Rows. Count-1; I ++) // traverse
{
CheckBox cbox = (CheckBox) GridView1.Rows [I]. FindControl ("cbSingleOrMore ");
If (cbAll. Checked = true)
{
Cbox. Checked = true;
}
Else
{
Cbox. Checked = false;
}
}
}
Protected void btnUpdateTime_Click (object sender, EventArgs e)
{
StringBuilder builder = new StringBuilder ();
Int I = 0;
Foreach (GridViewRow row in this. GridView1.Rows) // cyclically traverses the row IN the GridView control and assembles the in Clause
{
CheckBox cbox = row. FindControl ("cbSingleOrMore") as CheckBox;
If (cbox. Checked) // determines whether the check box is selected
{
// When the check box IN the Data row is selected, put the primary key value recorded IN the row into the IN Clause
Builder. AppendFormat ("'{0}',", this. GridView1.DataKeys [row. RowIndex]. Value. ToString ());
I ++;
Continue;
}
Continue;
}
If (builder. ToString (). Length = 0) // if no data row exists IN the IN clause, a prompt is displayed.
{
StrHelper. Alert ("no data row is selected. Please reselect it! ");
Return;
}
// Remove the last "," in the StringBuilder object
Builder. Remove (builder. ToString (). LastIndexOf (","), 1 );
// Assemble SQL statements
String SqlBuilderCopy = string. format ("Update tb_inf set issueDate = '{0}' WHERE id IN ({1})", DateTime. now. toString (), builder. toString ());
Sqlcon = new SqlConnection (strCon); // create a database connection
SqlCommand sqlcom; // create a command object variable
Int result = 0;
If (sqlcon. State. Equals (ConnectionState. Closed ))
Sqlcon. Open (); // Open the database connection
Sqlcom = new SqlCommand (SqlBuilderCopy, sqlcon );
SqlTransaction tran = sqlcon. BeginTransaction (); // instantiate the transaction. Note that the instantiated transaction must be in the database connection enabled state.
Sqlcom. Transaction = tran; // associate the command object with the connection object
Try
{
Result = sqlcom. ExecuteNonQuery (); // The number of rows affected by the receipt
Tran. Commit (); // submit the transaction
}
Catch (SqlException ex)
{
StrHelper. Alert (string. Format ("an exception occurred in the SQL statement. The exception is as follows: \ n {0}", ex. Message ));
Tran. Rollback (); // an exception occurs, that is, the transaction is rolled back to prevent dirty data.
Return;
}
Finally
{
Sqlcon. Close ();
}
If (result = I) // determine whether the number of affected rows is equal to the selected data rows
{
StrHelper. Alert ("data update successful! ");
}
Else
{
StrHelper. Alert ("data update failed, Transaction rolled back! ");
}
GV_DataBind (); // rebind Control Data
Return;
}
}
StrHelper. cs
Copy codeThe Code is as follows:Using System;
Using System. Data;
Using System. Configuration;
Using System. Linq;
Using System. Web;
Using System. Web. Security;
Using System. Web. UI;
Using System. Web. UI. HtmlControls;
Using System. Web. UI. WebControls;
Using System. Web. UI. WebControls. WebParts;
Using System. Xml. Linq;
// Introduce the following namespace
Using System. Text. RegularExpressions;
Using System. Text;
/// <Summary>
/// Summary of StrHelper
/// </Summary>
Public class StrHelper
{
Public StrHelper (){}
/// <Summary>
/// Truncates string functions
/// </Summary>
/// <Param name = "str"> string to be intercepted </param>
/// <Param name = "num"> extract the length of a string </param>
/// <Returns> </returns>
Static public string GetSubString (string str, int num)
{
# Region
Return (str. Length> num )? Str. Substring (0, num) + "...": str;
# Endregion
}
/// <Summary>
/// Extract the optimized string version
/// </Summary>
/// <Param name = "stringToSub"> string to be intercepted </param>
/// <Param name = "length"> extract the length of a string </param>
/// <Returns> </returns>
Public static string GetFirstString (string stringToSub, int length)
{
# Region
Regex regex = new Regex ("[\ u4e00-\ u9fa5] +", RegexOptions. Compiled );
Char [] stringChar = stringToSub. ToCharArray ();
StringBuilder sb = new StringBuilder ();
Int nLength = 0;
Bool isCut = false;
For (int I = 0; I <stringChar. Length; I ++)
{
If (regex. IsMatch (stringChar [I]). ToString () // regex. IsMatch indicates whether the regular expression matches the string.
{
Sb. Append (stringChar [I]); // Append the information to the end of the current StringBuilder
NLength + = 2;
}
Else
{
Sb. Append (stringChar [I]);
NLength = nLength + 1;
}
If (nLength> length) // Replace the string
{
IsCut = true;
Break;
}
}
If (isCut)
Return sb. ToString () + "...";
Else
Return sb. ToString ();
# Endregion
}
/// A small JavaScript window is displayed.
/// </Summary>
/// <Param name = "js"> window Information </param>
Public static void Alert (string message)
{
# Region
String js = @ "<Script language = 'javascript '>
Alert ('"+ message +"'); </Script> ";
HttpContext. Current. Response. Write (js );
# Endregion
}
Public static void GridViewHeader (GridView gdv) // display the header and prompt information without data
{
// Set the header
GridViewRow row = new GridViewRow (-1,-1, DataControlRowType. EmptyDataRow, DataControlRowState. Normal );
Foreach (DataControlField field in gdv. Columns)
{
TableCell cell = new TableCell ();
Cell. Text = field. HeaderText;
Cell. Width = field. HeaderStyle. Width;
Cell. Height = field. HeaderStyle. Height;
Cell. ForeColor = field. HeaderStyle. ForeColor;
Cell. Font. Size = field. HeaderStyle. Font. Size;
Cell. Font. Bold = field. HeaderStyle. Font. Bold;
Cell. Font. Name = field. HeaderStyle. Font. Name;
Cell. Font. Strikeout = field. HeaderStyle. Font. Strikeout;
Cell. Font. Underline = field. HeaderStyle. Font. Underline;
Cell. BackColor = field. HeaderStyle. BackColor;
Cell. VerticalAlign = field. HeaderStyle. VerticalAlign;
Cell. HorizontalAlign = field. HeaderStyle. HorizontalAlign;
Cell. CssClass = field. HeaderStyle. CssClass;
Cell. BorderColor = field. HeaderStyle. BorderColor;
Cell. BorderStyle = field. HeaderStyle. BorderStyle;
Cell. BorderWidth = field. HeaderStyle. BorderWidth;
Row. Cells. Add (cell );
}
TableItemStyle headStyle = gdv. HeaderStyle;
TableItemStyle emptyStyle = gdv. EmptyDataRowStyle;
EmptyStyle. Width = headStyle. Width;
EmptyStyle. Height = headStyle. Height;
EmptyStyle. ForeColor = headStyle. ForeColor;
EmptyStyle. Font. Size = headStyle. Font. Size;
EmptyStyle. Font. Bold = headStyle. Font. Bold;
EmptyStyle. Font. Name = headStyle. Font. Name;
EmptyStyle. Font. Strikeout = headStyle. Font. Strikeout;
EmptyStyle. Font. Underline = headStyle. Font. Underline;
EmptyStyle. BackColor = headStyle. BackColor;
EmptyStyle. VerticalAlign = headStyle. VerticalAlign;
EmptyStyle. HorizontalAlign = headStyle. HorizontalAlign;
EmptyStyle. CssClass = headStyle. CssClass;
EmptyStyle. BorderColor = headStyle. BorderColor;
EmptyStyle. BorderStyle = headStyle. BorderStyle;
EmptyStyle. BorderWidth = headStyle. BorderWidth;
// Blank row settings
GridViewRow row1 = new GridViewRow (0,-1, DataControlRowType. EmptyDataRow, DataControlRowState. Normal );
TableCell cell1 = new TableCell ();
Cell1.Text = "no relevant data can be displayed! ";
Cell1.BackColor = System. Drawing. Color. White;
Row1.Cells. Add (cell1 );
Cell1.ColumnSpan = 6; // merge Columns
If (gdv. Controls. Count = 0)
{
Gdv. Page. Response. Write ("<script language = 'javascript '> alert (' The DataBind method must be executed before the table class is initialized and the EmptyDataText attribute is set to not empty! '); </Script> ");
}
Else
{
Gdv. Controls [0]. Controls. Clear ();
Gdv. Controls [0]. Controls. AddAt (0, row );
Gdv. Controls [0]. Controls. AddAt (1, row1 );
}
}
}
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