Create a Supermap iclient Topic map, associate the External table, and filter by conditions

The previous topic diagram only associates with the External table and does not filter data based on Attribute conditions. There is no better sample program on the Internet, so I have crashed the iServer several times, the following are the key code for success.

:

// Link

VaR joinitem = new Supermap. Rest. joinitem ({
Foreigntablename: "v_region_land ",
Joinfilter: "bbs_parcel.cadastralno = v_region_land.cadastralno ",
Jointype: "innerjoin"
});

// Single-value style

VaR themeuniqueiteme30 = new Supermap. Rest. themeuniqueitem ({
Unique: _ discode, // specific field value of a single value
Style: style1
});

Themeunique2 = new Supermap. Rest. themeunique ({

Uniqueexpression: "v_region_land.fjbm", // single-Value Comparison Field
Items: [themeuniqueiteme30],
Defaultstyle: New Supermap. Rest. serverstyle ({
Fillopaquerate: 0,
Fillforecolor: New Supermap. Rest. servercolor (132,164,232 ),
Linecolor: New Supermap. Rest. servercolor (0,255, 0 ),
Linewidth: 0.1
})
}),
// Topic Map parameter object
Themeparameters = new Supermap. Rest. themeparameters ({
Themes: [themeunique2],
Displayfilters: ["v_region_land.fjbm =" + _ discode], // filter is effective here-core code
Datasourcenames: ["grid_sysdb"],
Datasetnames: ["bbs_parcel"],
Joinitems: [joinitem]

}),

Create a Supermap iclient Topic map, associate the External table, and filter by conditions