Html 从数据库获取画布的动态高度、宽度和颜色
我有一个MSSQL数据库。如何从该数据库获取和分配高度、宽度和颜色属性。要连接Mysql数据库,请使用PHP 试试这个,我希望这个代码能帮助你Html 从数据库获取画布的动态高度、宽度和颜色,html,css,canvas,Html,Css,Canvas,我有一个MSSQL数据库。如何从该数据库获取和分配高度、宽度和颜色属性。要连接Mysql数据库,请使用PHP 试试这个,我希望这个代码能帮助你 <canvas id="myCanvas" width="900" height="50" style="border:1px solid #d3d3d3;">Your browser does not support the HTML5 canvas tag.</canvas> <script> var c
<canvas id="myCanvas" width="900" height="50" style="border:1px solid #d3d3d3;">Your browser does not support the HTML5 canvas tag.</canvas>
<script>
var c = document.getElementById("myCanvas");
var ctx = c.getContext("2d");
ctx.fillStyle = "#FF0000";
ctx.fillRect(0, 0, 150, 50);
</script>
ASP.NET和C与SQL
C
ASP
你能告诉我们到目前为止你做了什么吗?另外,数据库中的哪些表和字段将用于获取高度、宽度和颜色?我希望在asp.net中连接,我的表的高度、宽度属性为float,颜色属性为varchar50。我希望在asp.net中连接,我的表的高度,宽度属性为float,颜色为varchar50,所以您希望在asp.net和cvar c=document.getElementByIdmyCanvas中完成此程序;var ctx=c.getContext2d;ctx.fillStyle=prod1color;ctx.fillRectprod1tail,0,prod1head,50;prod1color是一个字符串,我正在从数据库中获取它,但该颜色不是var c=document.getElementByIdmyCanvas;var ctx=c.getContext2d;颜色=绿色;ctx.fillStyle=颜色;ctx.20、20、150、100;使用十六进制代码或颜色名称更改颜色值
<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDB";
// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
$sql = "SELECT height, width, color FROM divsize";
$result = $conn->query($sql);
if ($result->num_rows > 0) {
// output data of each row
while($row = $result->fetch_assoc()) {
//create a Canvas
echo '<canvas id="myCanvas" width="'.$row["width"].'" height="'.$row["height"].'" style="border:1px solid '.$row["color"].';">Your browser does not support the HTML5 canvas tag.</canvas><br>';
}
} else {
//create default canvas
echo '<canvas id="myCanvas" width="900" height="50" style="border:1px solid #d3d3d3;">Your browser does not support the HTML5 canvas tag.</canvas>';
}
$conn->close();
?>
try
{
SqlConnection con = new SqlConnection("Connectionstring");
string Query = "SELECT height,width,color FROM divsize";
SqlCommand cmd = new SqlCommand(Query, con);
var Result = cmd.ExecuteReader();
if (Result.HasRows)
{
while (Result.Read())
{
Dynamicdiv.InnerHtml = "<div style='height:" + Result["height"].ToString() + "px;width:" + Result["width"].ToString() + "px;background-color:" + Result["color"].ToString() + ";'></div >";
}
}
else
{
Dynamicdiv.InnerHtml = "<div style='height:100px;width:200px;background-color:red;'></div>";
}
}
catch (Exception ex)
{
Response.Write(ex.Message);
}
<div runat="server" id="Dynamicdiv"></div>